Add OWL-ViT model for zero-shot object detection (#17938)

* add owlvit model skeleton

* add class and box predictor heads

* convert modified flax clip to pytorch

* fix box and class predictors

* add OwlViTImageTextEmbedder

* convert class and box head checkpoints

* convert image text embedder checkpoints

* add object detection head

* fix bugs

* update conversion script

* update conversion script

* fix q,v,k,out weight conversion conversion

* add owlvit object detection output

* fix bug in image embedder

* fix bugs in text embedder

* fix positional embeddings

* fix bug in inference mode vision pooling

* update docs, init tokenizer and processor files

* support batch processing

* add OwlViTProcessor

* remove merge conflicts

* readd owlvit imports

* fix bug in OwlViTProcessor imports

* fix bugs in processor

* update docs

* fix bugs in processor

* update owlvit docs

* add OwlViTFeatureExtractor

* style changes, add postprocess method to feature extractor

* add feature extractor and processor tests

* add object detection tests

* update conversion script

* update config paths

* update config paths

* fix configuration paths and bugs

* fix bugs in OwlViT tests

* add import checks to processor

* fix docs and minor issues

* fix docs and minor issues

* fix bugs and issues

* fix bugs and issues

* fix bugs and issues

* fix bugs and issues

* update docs and examples

* fix bugs and issues

* update conversion script, fix positional embeddings

* process 2D input ids, update tests

* fix style and quality issues

* update docs

* update docs and imports

* update OWL-ViT index.md

* fix bug in OwlViT feature ext tests

* fix code examples, return_dict by default

* return_dict by default

* minor fixes, add tests to processor

* small fixes

* add output_attentions arg to main model

* fix bugs

* remove output_hidden_states arg from main model

* update self.config variables

* add option to return last_hidden_states

* fix bug in config variables

* fix copied from statements

* fix small issues and bugs

* fix bugs

* fix bugs, support greyscale images

* run fixup

* update repo name

* merge OwlViTImageTextEmbedder with obj detection head

* fix merge conflict

* fix merge conflict

* make fixup

* fix bugs

* fix bugs

* add additional processor test

README.md

@@ -332,6 +332,7 @@ Current number of checkpoints: ![](https://img.shields.io/endpoint?url=https://h
 1. **[NLLB](https://huggingface.co/docs/transformers/main/model_doc/nllb)** (from Meta) released with the paper [No Language Left Behind: Scaling Human-Centered Machine Translation](https://arxiv.org/abs/2207.04672) by the NLLB team.
 1. **[Nyströmformer](https://huggingface.co/docs/transformers/model_doc/nystromformer)** (from the University of Wisconsin - Madison) released with the paper [Nyströmformer: A Nyström-Based Algorithm for Approximating Self-Attention](https://arxiv.org/abs/2102.03902) by Yunyang Xiong, Zhanpeng Zeng, Rudrasis Chakraborty, Mingxing Tan, Glenn Fung, Yin Li, Vikas Singh.
 1. **[OPT](https://huggingface.co/docs/transformers/master/model_doc/opt)** (from Meta AI) released with the paper [OPT: Open Pre-trained Transformer Language Models](https://arxiv.org/abs/2205.01068) by Susan Zhang, Stephen Roller, Naman Goyal, Mikel Artetxe, Moya Chen, Shuohui Chen et al.
+1. **[OWL-ViT](https://huggingface.co/docs/transformers/main/model_doc/owlvit)** (from Google AI) released with the paper [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby.
 1. **[Pegasus](https://huggingface.co/docs/transformers/model_doc/pegasus)** (from Google) released with the paper [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777) by Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu.
 1. **[Perceiver IO](https://huggingface.co/docs/transformers/model_doc/perceiver)** (from Deepmind) released with the paper [Perceiver IO: A General Architecture for Structured Inputs & Outputs](https://arxiv.org/abs/2107.14795) by Andrew Jaegle, Sebastian Borgeaud, Jean-Baptiste Alayrac, Carl Doersch, Catalin Ionescu, David Ding, Skanda Koppula, Daniel Zoran, Andrew Brock, Evan Shelhamer, Olivier Hénaff, Matthew M. Botvinick, Andrew Zisserman, Oriol Vinyals, João Carreira.
 1. **[PhoBERT](https://huggingface.co/docs/transformers/model_doc/phobert)** (from VinAI Research) released with the paper [PhoBERT: Pre-trained language models for Vietnamese](https://www.aclweb.org/anthology/2020.findings-emnlp.92/) by Dat Quoc Nguyen and Anh Tuan Nguyen.

README_ko.md

@@ -288,6 +288,7 @@ Flax, PyTorch, TensorFlow 설치 페이지에서 이들을 conda로 설치하는
 1. **[NLLB](https://huggingface.co/docs/transformers/main/model_doc/nllb)** (from Meta) released with the paper [No Language Left Behind: Scaling Human-Centered Machine Translation](https://arxiv.org/abs/2207.04672) by the NLLB team.
 1. **[Nyströmformer](https://huggingface.co/docs/transformers/model_doc/nystromformer)** (from the University of Wisconsin - Madison) released with the paper [Nyströmformer: A Nyström-Based Algorithm for Approximating Self-Attention](https://arxiv.org/abs/2102.03902) by Yunyang Xiong, Zhanpeng Zeng, Rudrasis Chakraborty, Mingxing Tan, Glenn Fung, Yin Li, Vikas Singh.
 1. **[OPT](https://huggingface.co/docs/transformers/master/model_doc/opt)** (from Meta AI) released with the paper [OPT: Open Pre-trained Transformer Language Models](https://arxiv.org/abs/2205.01068) by Susan Zhang, Stephen Roller, Naman Goyal, Mikel Artetxe, Moya Chen, Shuohui Chen et al.
+1. **[OWL-ViT](https://huggingface.co/docs/transformers/main/model_doc/owlvit)** (from Google AI) released with the paper [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby.
 1. **[Pegasus](https://huggingface.co/docs/transformers/model_doc/pegasus)** (from Google) released with the paper [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777) by Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu.
 1. **[Perceiver IO](https://huggingface.co/docs/transformers/model_doc/perceiver)** (from Deepmind) released with the paper [Perceiver IO: A General Architecture for Structured Inputs & Outputs](https://arxiv.org/abs/2107.14795) by Andrew Jaegle, Sebastian Borgeaud, Jean-Baptiste Alayrac, Carl Doersch, Catalin Ionescu, David Ding, Skanda Koppula, Daniel Zoran, Andrew Brock, Evan Shelhamer, Olivier Hénaff, Matthew M. Botvinick, Andrew Zisserman, Oriol Vinyals, João Carreira.
 1. **[PhoBERT](https://huggingface.co/docs/transformers/model_doc/phobert)** (from VinAI Research) released with the paper [PhoBERT: Pre-trained language models for Vietnamese](https://www.aclweb.org/anthology/2020.findings-emnlp.92/) by Dat Quoc Nguyen and Anh Tuan Nguyen.

README_zh-hans.md

@@ -312,6 +312,7 @@ conda install -c huggingface transformers
 1. **[NLLB](https://huggingface.co/docs/transformers/main/model_doc/nllb)** (来自 Meta) 伴随论文 [No Language Left Behind: Scaling Human-Centered Machine Translation](https://arxiv.org/abs/2207.04672) 由 the NLLB team 发布。
 1. **[Nyströmformer](https://huggingface.co/docs/transformers/model_doc/nystromformer)** (来自 the University of Wisconsin - Madison) 伴随论文 [Nyströmformer: A Nyström-Based Algorithm for Approximating Self-Attention](https://arxiv.org/abs/2102.03902) 由 Yunyang Xiong, Zhanpeng Zeng, Rudrasis Chakraborty, Mingxing Tan, Glenn Fung, Yin Li, Vikas Singh 发布。
 1. **[OPT](https://huggingface.co/docs/transformers/master/model_doc/opt)** (来自 Meta AI) 伴随论文 [OPT: Open Pre-trained Transformer Language Models](https://arxiv.org/abs/2205.01068) 由 Susan Zhang, Stephen Roller, Naman Goyal, Mikel Artetxe, Moya Chen, Shuohui Chen et al 发布。
+1. **[OWL-ViT](https://huggingface.co/docs/transformers/main/model_doc/owlvit)** (来自 Google AI) 伴随论文 [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) 由 Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby 发布。
 1. **[Pegasus](https://huggingface.co/docs/transformers/model_doc/pegasus)** (来自 Google) 伴随论文 [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777) 由 Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu 发布。
 1. **[Perceiver IO](https://huggingface.co/docs/transformers/model_doc/perceiver)** (来自 Deepmind) 伴随论文 [Perceiver IO: A General Architecture for Structured Inputs & Outputs](https://arxiv.org/abs/2107.14795) 由 Andrew Jaegle, Sebastian Borgeaud, Jean-Baptiste Alayrac, Carl Doersch, Catalin Ionescu, David Ding, Skanda Koppula, Daniel Zoran, Andrew Brock, Evan Shelhamer, Olivier Hénaff, Matthew M. Botvinick, Andrew Zisserman, Oriol Vinyals, João Carreira 发布。
 1. **[PhoBERT](https://huggingface.co/docs/transformers/model_doc/phobert)** (来自 VinAI Research) 伴随论文 [PhoBERT: Pre-trained language models for Vietnamese](https://www.aclweb.org/anthology/2020.findings-emnlp.92/) 由 Dat Quoc Nguyen and Anh Tuan Nguyen 发布。

README_zh-hant.md

@@ -324,6 +324,7 @@ conda install -c huggingface transformers
 1. **[NLLB](https://huggingface.co/docs/transformers/main/model_doc/nllb)** (from Meta) released with the paper [No Language Left Behind: Scaling Human-Centered Machine Translation](https://arxiv.org/abs/2207.04672) by the NLLB team.
 1. **[Nyströmformer](https://huggingface.co/docs/transformers/model_doc/nystromformer)** (from the University of Wisconsin - Madison) released with the paper [Nyströmformer: A Nyström-Based Algorithm for Approximating Self-Attention](https://arxiv.org/abs/2102.03902) by Yunyang Xiong, Zhanpeng Zeng, Rudrasis Chakraborty, Mingxing Tan, Glenn Fung, Yin Li, Vikas Singh.
 1. **[OPT](https://huggingface.co/docs/transformers/master/model_doc/opt)** (from Meta AI) released with the paper [OPT: Open Pre-trained Transformer Language Models](https://arxiv.org/abs/2205.01068) by Susan Zhang, Stephen Roller, Naman Goyal, Mikel Artetxe, Moya Chen, Shuohui Chen et al.
+1. **[OWL-ViT](https://huggingface.co/docs/transformers/main/model_doc/owlvit)** (from Google AI) released with the paper [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby.
 1. **[Pegasus](https://huggingface.co/docs/transformers/model_doc/pegasus)** (from Google) released with the paper [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777) by Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu.
 1. **[Perceiver IO](https://huggingface.co/docs/transformers/model_doc/perceiver)** (from Deepmind) released with the paper [Perceiver IO: A General Architecture for Structured Inputs & Outputs](https://arxiv.org/abs/2107.14795) by Andrew Jaegle, Sebastian Borgeaud, Jean-Baptiste Alayrac, Carl Doersch, Catalin Ionescu, David Ding, Skanda Koppula, Daniel Zoran, Andrew Brock, Evan Shelhamer, Olivier Hénaff, Matthew M. Botvinick, Andrew Zisserman, Oriol Vinyals, João Carreira.
 1. **[PhoBERT](https://huggingface.co/docs/transformers/model_doc/phobert)** (from VinAI Research) released with the paper [PhoBERT: Pre-trained language models for Vietnamese](https://www.aclweb.org/anthology/2020.findings-emnlp.92/) by Dat Quoc Nguyen and Anh Tuan Nguyen.

docs/source/en/_toctree.yml

@@ -326,6 +326,8 @@
       title: Nyströmformer
     - local: model_doc/opt
       title: OPT
+    - local: model_doc/owlvit
+      title: OWL-ViT
     - local: model_doc/pegasus
       title: Pegasus
     - local: model_doc/perceiver

docs/source/en/index.mdx

@@ -130,6 +130,7 @@ The library currently contains JAX, PyTorch and TensorFlow implementations, pret
 1. **[NLLB](model_doc/nllb)** (from Meta) released with the paper [No Language Left Behind: Scaling Human-Centered Machine Translation](https://arxiv.org/abs/2207.04672) by the NLLB team.
 1. **[Nyströmformer](model_doc/nystromformer)** (from the University of Wisconsin - Madison) released with the paper [Nyströmformer: A Nyström-Based Algorithm for Approximating Self-Attention](https://arxiv.org/abs/2102.03902) by Yunyang Xiong, Zhanpeng Zeng, Rudrasis Chakraborty, Mingxing Tan, Glenn Fung, Yin Li, Vikas Singh.
 1. **[OPT](master/model_doc/opt)** (from Meta AI) released with the paper [OPT: Open Pre-trained Transformer Language Models](https://arxiv.org/abs/2205.01068) by Susan Zhang, Stephen Roller, Naman Goyal, Mikel Artetxe, Moya Chen, Shuohui Chen et al.
+1. **[OWL-ViT](model_doc/owlvit)** (from Google AI) released with the paper [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby.
 1. **[Pegasus](model_doc/pegasus)** (from Google) released with the paper [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777) by Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu.
 1. **[Perceiver IO](model_doc/perceiver)** (from Deepmind) released with the paper [Perceiver IO: A General Architecture for Structured Inputs & Outputs](https://arxiv.org/abs/2107.14795) by Andrew Jaegle, Sebastian Borgeaud, Jean-Baptiste Alayrac, Carl Doersch, Catalin Ionescu, David Ding, Skanda Koppula, Daniel Zoran, Andrew Brock, Evan Shelhamer, Olivier Hénaff, Matthew M. Botvinick, Andrew Zisserman, Oriol Vinyals, João Carreira.
 1. **[PhoBERT](model_doc/phobert)** (from VinAI Research) released with the paper [PhoBERT: Pre-trained language models for Vietnamese](https://www.aclweb.org/anthology/2020.findings-emnlp.92/) by Dat Quoc Nguyen and Anh Tuan Nguyen.
@@ -263,6 +264,7 @@ Flax), PyTorch, and/or TensorFlow.
 |         OpenAI GPT          |       ✅       |       ✅       |       ✅        |         ✅         |      ❌      |
 |        OpenAI GPT-2         |       ✅       |       ✅       |       ✅        |         ✅         |      ✅      |
 |             OPT             |       ❌       |       ❌       |       ✅        |         ✅         |      ✅      |
+|           OWL-ViT           |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |           Pegasus           |       ✅       |       ✅       |       ✅        |         ✅         |      ✅      |
 |          Perceiver          |       ✅       |       ❌       |       ✅        |         ❌         |      ❌      |
 |           PLBart            |       ✅       |       ❌       |       ✅        |         ❌         |      ❌      |

docs/source/en/model_doc/owlvit.mdx

+<!--Copyright 2022 The HuggingFace Team. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+-->
+
+# OWL-ViT
+
+## Overview
+
+The OWL-ViT (short for Vision Transformer for Open-World Localization) was proposed in [Simple Open-Vocabulary Object Detection with Vision Transformers](https://arxiv.org/abs/2205.06230) by Matthias Minderer, Alexey Gritsenko, Austin Stone, Maxim Neumann, Dirk Weissenborn, Alexey Dosovitskiy, Aravindh Mahendran, Anurag Arnab, Mostafa Dehghani, Zhuoran Shen, Xiao Wang, Xiaohua Zhai, Thomas Kipf, and Neil Houlsby. OWL-ViT is an open-vocabulary object detection network trained on a variety of (image, text) pairs. It can be used to query an image with one or multiple text queries to search for and detect target objects described in text.
+
+The abstract from the paper is the following:
+
+*Combining simple architectures with large-scale pre-training has led to massive improvements in image classification. For object detection, pre-training and scaling approaches are less well established, especially in the long-tailed and open-vocabulary setting, where training data is relatively scarce. In this paper, we propose a strong recipe for transferring image-text models to open-vocabulary object detection. We use a standard Vision Transformer architecture with minimal modifications, contrastive image-text pre-training, and end-to-end detection fine-tuning. Our analysis of the scaling properties of this setup shows that increasing image-level pre-training and model size yield consistent improvements on the downstream detection task. We provide the adaptation strategies and regularizations needed to attain very strong performance on zero-shot text-conditioned and one-shot image-conditioned object detection. Code and models are available on GitHub.*
+
+## Usage
+
+OWL-ViT is a zero-shot text-conditioned object detection model. OWL-ViT uses [CLIP](clip) as its multi-modal backbone, with a ViT-like Transformer to get visual features and a causal language model to get the text features. To use CLIP for detection, OWL-ViT removes the final token pooling layer of the vision model and attaches a lightweight classification and box head to each transformer output token. Open-vocabulary classification is enabled by replacing the fixed classification layer weights with the class-name embeddings obtained from the text model. The authors first train CLIP from scratch and fine-tune it end-to-end with the classification and box heads on standard detection datasets using a bipartite matching loss. One or multiple text queries per image can be used to perform zero-shot text-conditioned object detection. 
+
+[`OwlViTFeatureExtractor`] can be used to resize (or rescale) and normalize images for the model and [`CLIPTokenizer`] is used to encode the text. [`OwlViTProcessor`] wraps [`OwlViTFeatureExtractor`] and [`CLIPTokenizer`] into a single instance to both encode the text and prepare the images. The following example shows how to perform object detection using [`OwlViTProcessor`] and [`OwlViTForObjectDetection`].
+
+
+```python
+>>> import requests
+>>> from PIL import Image
+>>> import torch
+
+>>> from transformers import OwlViTProcessor, OwlViTForObjectDetection
+
+>>> processor = OwlViTProcessor.from_pretrained("google/owlvit-base-patch32")
+>>> model = OwlViTForObjectDetection.from_pretrained("google/owlvit-base-patch32")
+
+>>> url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+>>> image = Image.open(requests.get(url, stream=True).raw)
+
+>>> inputs = processor(text=[["a photo of a cat", "a photo of a dog"]], images=image, return_tensors="pt")
+
+>>> outputs = model(**inputs)
+>>> logits = outputs["logits"]  # Prediction logits of shape [batch_size, num_patches, num_max_text_queries]
+>>> boxes = outputs["pred_boxes"]  # Object box boundaries of shape [batch_size, num_patches, 4]
+
+>>> batch_size = boxes.shape[0]
+>>> for i in range(batch_size):  # Loop over sets of images and text queries
+...     boxes = outputs["pred_boxes"][i]
+...     logits = torch.max(outputs["logits"][i], dim=-1)
+...     scores = torch.sigmoid(logits.values)
+...     labels = logits.indices
+```
+
+This model was contributed by [adirik](https://huggingface.co/adirik). The original code can be found [here](https://github.com/google-research/scenic/tree/main/scenic/projects/owl_vit).
+
+## OwlViTConfig
+
+[[autodoc]] OwlViTConfig
+    - from_text_vision_configs
+
+## OwlViTTextConfig
+
+[[autodoc]] OwlViTTextConfig
+
+## OwlViTVisionConfig
+
+[[autodoc]] OwlViTVisionConfig
+
+## OwlViTFeatureExtractor
+
+[[autodoc]] OwlViTFeatureExtractor
+    - __call__
+
+## OwlViTProcessor
+
+[[autodoc]] OwlViTProcessor
+
+## OwlViTModel
+
+[[autodoc]] OwlViTModel
+    - forward
+    - get_text_features
+    - get_image_features
+
+## OwlViTTextModel
+
+[[autodoc]] OwlViTTextModel
+    - forward
+
+## OwlViTVisionModel
+
+[[autodoc]] OwlViTVisionModel
+    - forward
+
+## OwlViTForObjectDetection
+
+[[autodoc]] OwlViTForObjectDetection
+    - forward

src/transformers/__init__.py

@@ -273,6 +273,13 @@ _import_structure = {
     ],
     "models.openai": ["OPENAI_GPT_PRETRAINED_CONFIG_ARCHIVE_MAP", "OpenAIGPTConfig", "OpenAIGPTTokenizer"],
     "models.opt": ["OPTConfig"],
+    "models.owlvit": [
+        "OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP",
+        "OwlViTConfig",
+        "OwlViTProcessor",
+        "OwlViTTextConfig",
+        "OwlViTVisionConfig",
+    ],
     "models.pegasus": ["PEGASUS_PRETRAINED_CONFIG_ARCHIVE_MAP", "PegasusConfig", "PegasusTokenizer"],
     "models.perceiver": ["PERCEIVER_PRETRAINED_CONFIG_ARCHIVE_MAP", "PerceiverConfig", "PerceiverTokenizer"],
     "models.phobert": ["PhobertTokenizer"],
@@ -641,6 +648,7 @@ else:
     _import_structure["models.levit"].append("LevitFeatureExtractor")
     _import_structure["models.maskformer"].append("MaskFormerFeatureExtractor")
     _import_structure["models.mobilevit"].append("MobileViTFeatureExtractor")
+    _import_structure["models.owlvit"].append("OwlViTFeatureExtractor")
     _import_structure["models.perceiver"].append("PerceiverFeatureExtractor")
     _import_structure["models.poolformer"].append("PoolFormerFeatureExtractor")
     _import_structure["models.segformer"].append("SegformerFeatureExtractor")
@@ -1507,6 +1515,16 @@ else:
             "OPTForSequenceClassification",
         ]
     )
+    _import_structure["models.owlvit"].extend(
+        [
+            "OWLVIT_PRETRAINED_MODEL_ARCHIVE_LIST",
+            "OwlViTModel",
+            "OwlViTPreTrainedModel",
+            "OwlViTTextModel",
+            "OwlViTVisionModel",
+            "OwlViTForObjectDetection",
+        ]
+    )
     _import_structure["models.pegasus"].extend(
         ["PegasusForCausalLM", "PegasusForConditionalGeneration", "PegasusModel", "PegasusPreTrainedModel"]
     )
@@ -3012,6 +3030,13 @@ if TYPE_CHECKING:
     from .models.nystromformer import NYSTROMFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, NystromformerConfig
     from .models.openai import OPENAI_GPT_PRETRAINED_CONFIG_ARCHIVE_MAP, OpenAIGPTConfig, OpenAIGPTTokenizer
     from .models.opt import OPTConfig
+    from .models.owlvit import (
+        OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP,
+        OwlViTConfig,
+        OwlViTProcessor,
+        OwlViTTextConfig,
+        OwlViTVisionConfig,
+    )
     from .models.pegasus import PEGASUS_PRETRAINED_CONFIG_ARCHIVE_MAP, PegasusConfig, PegasusTokenizer
     from .models.perceiver import PERCEIVER_PRETRAINED_CONFIG_ARCHIVE_MAP, PerceiverConfig, PerceiverTokenizer
     from .models.phobert import PhobertTokenizer
@@ -3328,6 +3353,7 @@ if TYPE_CHECKING:
         from .models.levit import LevitFeatureExtractor
         from .models.maskformer import MaskFormerFeatureExtractor
         from .models.mobilevit import MobileViTFeatureExtractor
+        from .models.owlvit import OwlViTFeatureExtractor
         from .models.perceiver import PerceiverFeatureExtractor
         from .models.poolformer import PoolFormerFeatureExtractor
         from .models.segformer import SegformerFeatureExtractor
@@ -4044,6 +4070,14 @@ if TYPE_CHECKING:
             OPTModel,
             OPTPreTrainedModel,
         )
+        from .models.owlvit import (
+            OWLVIT_PRETRAINED_MODEL_ARCHIVE_LIST,
+            OwlViTForObjectDetection,
+            OwlViTModel,
+            OwlViTPreTrainedModel,
+            OwlViTTextModel,
+            OwlViTVisionModel,
+        )
         from .models.pegasus import (
             PegasusForCausalLM,
             PegasusForConditionalGeneration,

src/transformers/models/__init__.py

@@ -101,6 +101,7 @@ from . import (
     nystromformer,
     openai,
     opt,
+    owlvit,
     pegasus,
     perceiver,
     phobert,

src/transformers/models/auto/configuration_auto.py

@@ -98,6 +98,7 @@ CONFIG_MAPPING_NAMES = OrderedDict(
         ("nystromformer", "NystromformerConfig"),
         ("openai-gpt", "OpenAIGPTConfig"),
         ("opt", "OPTConfig"),
+        ("owlvit", "OwlViTConfig"),
         ("pegasus", "PegasusConfig"),
         ("perceiver", "PerceiverConfig"),
         ("plbart", "PLBartConfig"),
@@ -216,6 +217,7 @@ CONFIG_ARCHIVE_MAP_MAPPING_NAMES = OrderedDict(
         ("nystromformer", "NYSTROMFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("openai-gpt", "OPENAI_GPT_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("opt", "OPT_PRETRAINED_CONFIG_ARCHIVE_MAP"),
+        ("owlvit", "OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("pegasus", "PEGASUS_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("perceiver", "PERCEIVER_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("plbart", "PLBART_PRETRAINED_CONFIG_ARCHIVE_MAP"),
@@ -346,6 +348,7 @@ MODEL_NAMES_MAPPING = OrderedDict(
         ("nystromformer", "Nyströmformer"),
         ("openai-gpt", "OpenAI GPT"),
         ("opt", "OPT"),
+        ("owlvit", "OWL-ViT"),
         ("pegasus", "Pegasus"),
         ("perceiver", "Perceiver"),
         ("phobert", "PhoBERT"),

src/transformers/models/auto/feature_extraction_auto.py

@@ -58,6 +58,7 @@ FEATURE_EXTRACTOR_MAPPING_NAMES = OrderedDict(
         ("maskformer", "MaskFormerFeatureExtractor"),
         ("mctct", "MCTCTFeatureExtractor"),
         ("mobilevit", "MobileViTFeatureExtractor"),
+        ("owlvit", "OwlViTFeatureExtractor"),
         ("perceiver", "PerceiverFeatureExtractor"),
         ("poolformer", "PoolFormerFeatureExtractor"),
         ("regnet", "ConvNextFeatureExtractor"),

src/transformers/models/auto/modeling_auto.py

@@ -98,6 +98,7 @@ MODEL_MAPPING_NAMES = OrderedDict(
         ("nystromformer", "NystromformerModel"),
         ("openai-gpt", "OpenAIGPTModel"),
         ("opt", "OPTModel"),
+        ("owlvit", "OwlViTModel"),
         ("pegasus", "PegasusModel"),
         ("perceiver", "PerceiverModel"),
         ("plbart", "PLBartModel"),

src/transformers/models/auto/processing_auto.py

@@ -43,6 +43,7 @@ PROCESSOR_MAPPING_NAMES = OrderedDict(
         ("layoutlmv2", "LayoutLMv2Processor"),
         ("layoutlmv3", "LayoutLMv3Processor"),
         ("layoutxlm", "LayoutXLMProcessor"),
+        ("owlvit", "OwlViTProcessor"),
         ("sew", "Wav2Vec2Processor"),
         ("sew-d", "Wav2Vec2Processor"),
         ("speech_to_text", "Speech2TextProcessor"),

src/transformers/models/auto/tokenization_auto.py

@@ -193,6 +193,7 @@ else:
             ),
             ("openai-gpt", ("OpenAIGPTTokenizer", "OpenAIGPTTokenizerFast" if is_tokenizers_available() else None)),
             ("opt", ("GPT2Tokenizer", None)),
+            ("owlvit", ("CLIPTokenizer", "CLIPTokenizerFast" if is_tokenizers_available() else None)),
             (
                 "pegasus",
                 (

src/transformers/models/clip/configuration_clip.py

@@ -199,6 +199,7 @@ class CLIPVisionConfig(PretrainedConfig):
         intermediate_size=3072,
         num_hidden_layers=12,
         num_attention_heads=12,
+        num_channels=3,
         image_size=224,
         patch_size=32,
         hidden_act="quick_gelu",
@@ -216,6 +217,7 @@ class CLIPVisionConfig(PretrainedConfig):
         self.dropout = dropout
         self.num_hidden_layers = num_hidden_layers
         self.num_attention_heads = num_attention_heads
+        self.num_channels = num_channels
         self.patch_size = patch_size
         self.image_size = image_size
         self.initializer_range = initializer_range

src/transformers/models/owlvit/__init__.py

+# flake8: noqa
+# There's no way to ignore "F401 '...' imported but unused" warnings in this
+# module, but to preserve other warnings. So, don't check this module at all.
+
+# Copyright 2022 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from typing import TYPE_CHECKING
+
+from ...utils import (
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    is_flax_available,
+    is_tf_available,
+    is_tokenizers_available,
+    is_torch_available,
+    is_vision_available,
+)
+
+
+_import_structure = {
+    "configuration_owlvit": [
+        "OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP",
+        "OwlViTConfig",
+        "OwlViTTextConfig",
+        "OwlViTVisionConfig",
+    ],
+    "processing_owlvit": ["OwlViTProcessor"],
+}
+
+
+try:
+    if not is_vision_available() or not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["feature_extraction_owlvit"] = ["OwlViTFeatureExtractor"]
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_owlvit"] = [
+        "OWLVIT_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "OwlViTModel",
+        "OwlViTPreTrainedModel",
+        "OwlViTTextModel",
+        "OwlViTVisionModel",
+        "OwlViTForObjectDetection",
+    ]
+
+if TYPE_CHECKING:
+    from .configuration_owlvit import (
+        OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP,
+        OwlViTConfig,
+        OwlViTTextConfig,
+        OwlViTVisionConfig,
+    )
+    from .processing_owlvit import OwlViTProcessor
+
+    try:
+        if not is_vision_available() or not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .feature_extraction_owlvit import OwlViTFeatureExtractor
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_owlvit import (
+            OWLVIT_PRETRAINED_MODEL_ARCHIVE_LIST,
+            OwlViTForObjectDetection,
+            OwlViTModel,
+            OwlViTPreTrainedModel,
+            OwlViTTextModel,
+            OwlViTVisionModel,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/owlvit/configuration_owlvit.py

+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" OWL-ViT model configuration"""
+
+import copy
+import os
+from typing import Dict, Union
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+OWLVIT_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "google/owlvit-base-patch32": "https://huggingface.co/google/owlvit-base-patch32/resolve/main/config.json",
+    "google/owlvit-base-patch16": "https://huggingface.co/google/owlvit-base-patch16/resolve/main/config.json",
+    "google/owlvit-large-patch14": "https://huggingface.co/google/owlvit-large-patch14/resolve/main/config.json",
+}
+
+
+class OwlViTTextConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of an [`OwlViTTextModel`]. It is used to instantiate an
+    OwlViT text encoder according to the specified arguments, defining the model architecture. Instantiating a
+    configuration with the defaults will yield a similar configuration to that of the OwlViT
+    [google/owlvit-base-patch32](https://huggingface.co/google/owlvit-base-patch32) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 49408):
+            Vocabulary size of the OWL-ViT text model. Defines the number of different tokens that can be represented
+            by the `inputs_ids` passed when calling [`OwlViTTextModel`].
+        hidden_size (`int`, *optional*, defaults to 512):
+            Dimensionality of the encoder layers and the pooler layer.
+        intermediate_size (`int`, *optional*, defaults to 2048):
+            Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder.
+        num_hidden_layers (`int`, *optional*, defaults to 12):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 8):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        max_position_embeddings (`int`, *optional*, defaults to 16):
+            The maximum sequence length that this model might ever be used with. Typically set this to something large
+            just in case (e.g., 512 or 1024 or 2048).
+        hidden_act (`str` or `function`, *optional*, defaults to `"quick_gelu"`):
+            The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
+            `"relu"`, `"selu"` and `"gelu_new"` ``"quick_gelu"` are supported. layer_norm_eps (`float`, *optional*,
+            defaults to 1e-5): The epsilon used by the layer normalization layers.
+        attention_dropout (`float`, *optional*, defaults to 0.0):
+            The dropout ratio for the attention probabilities.
+        dropout (`float`, *optional*, defaults to 0.0):
+            The dropout probabilitiy for all fully connected layers in the embeddings, encoder, and pooler.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        initializer_factor (`float`, *optional*, defaults to 1):
+            A factor for initializing all weight matrices (should be kept to 1, used internally for initialization
+            testing).
+
+    Example:
+
+    ```python
+    >>> from transformers import OwlViTTextConfig, OwlViTTextModel
+
+    >>> # Initializing a OwlViTTextModel with google/owlvit-base-patch32 style configuration
+    >>> configuration = OwlViTTextConfig()
+
+    >>> # Initializing a OwlViTTextConfig from the google/owlvit-base-patch32 style configuration
+    >>> model = OwlViTTextModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+    model_type = "owlvit_text_model"
+
+    def __init__(
+        self,
+        vocab_size=49408,
+        hidden_size=512,
+        intermediate_size=2048,
+        num_hidden_layers=12,
+        num_attention_heads=8,
+        max_position_embeddings=16,
+        hidden_act="quick_gelu",
+        layer_norm_eps=0.00001,
+        dropout=0.0,
+        attention_dropout=0.0,
+        initializer_range=0.02,
+        initializer_factor=1.0,
+        pad_token_id=0,
+        bos_token_id=49406,
+        eos_token_id=49407,
+        **kwargs
+    ):
+        super().__init__(pad_token_id=pad_token_id, bos_token_id=bos_token_id, eos_token_id=eos_token_id, **kwargs)
+
+        self.vocab_size = vocab_size
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.max_position_embeddings = max_position_embeddings
+        self.hidden_act = hidden_act
+        self.layer_norm_eps = layer_norm_eps
+        self.dropout = dropout
+        self.attention_dropout = attention_dropout
+        self.initializer_range = initializer_range
+        self.initializer_factor = initializer_factor
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig":
+
+        config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
+
+        # get the text config dict if we are loading from OwlViTConfig
+        if config_dict.get("model_type") == "owlvit":
+            config_dict = config_dict["text_config"]
+
+        if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type:
+            logger.warning(
+                f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
+                f"{cls.model_type}. This is not supported for all configurations of models and can yield errors."
+            )
+
+        return cls.from_dict(config_dict, **kwargs)
+
+
+class OwlViTVisionConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of an [`OwlViTVisionModel`]. It is used to instantiate
+    an OWL-ViT image encoder according to the specified arguments, defining the model architecture. Instantiating a
+    configuration with the defaults will yield a similar configuration to that of the OWL-ViT
+    [google/owlvit-base-patch32](https://huggingface.co/google/owlvit-base-patch32) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        hidden_size (`int`, *optional*, defaults to 768):
+            Dimensionality of the encoder layers and the pooler layer.
+        intermediate_size (`int`, *optional*, defaults to 3072):
+            Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder.
+        num_hidden_layers (`int`, *optional*, defaults to 12):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 12):
+            Number of attention heads for each attention layer in the Transformer encoder.
+        image_size (`int`, *optional*, defaults to 768):
+            The size (resolution) of each image.
+        patch_size (`int`, *optional*, defaults to 32):
+            The size (resolution) of each patch.
+        hidden_act (`str` or `function`, *optional*, defaults to `"quick_gelu"`):
+            The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
+            `"relu"`, `"selu"` and `"gelu_new"` ``"quick_gelu"` are supported. layer_norm_eps (`float`, *optional*,
+            defaults to 1e-5): The epsilon used by the layer normalization layers.
+        dropout (`float`, *optional*, defaults to 0.0):
+            The dropout probabilitiy for all fully connected layers in the embeddings, encoder, and pooler.
+        attention_dropout (`float`, *optional*, defaults to 0.0):
+            The dropout ratio for the attention probabilities.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        initializer_factor (`float``, *optional*, defaults to 1):
+            A factor for initializing all weight matrices (should be kept to 1, used internally for initialization
+            testing).
+
+    Example:
+
+    ```python
+    >>> from transformers import OwlViTVisionConfig, OwlViTVisionModel
+
+    >>> # Initializing a OwlViTVisionModel with google/owlvit-base-patch32 style configuration
+    >>> configuration = OwlViTVisionConfig()
+
+    >>> # Initializing a OwlViTVisionModel model from the google/owlvit-base-patch32 style configuration
+    >>> model = OwlViTVisionModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "owlvit_vision_model"
+
+    def __init__(
+        self,
+        hidden_size=768,
+        intermediate_size=3072,
+        num_hidden_layers=12,
+        num_attention_heads=12,
+        image_size=768,
+        patch_size=32,
+        hidden_act="quick_gelu",
+        layer_norm_eps=0.00001,
+        dropout=0.0,
+        attention_dropout=0.0,
+        initializer_range=0.02,
+        initializer_factor=1.0,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.image_size = image_size
+        self.patch_size = patch_size
+        self.hidden_act = hidden_act
+        self.layer_norm_eps = layer_norm_eps
+        self.dropout = dropout
+        self.attention_dropout = attention_dropout
+        self.initializer_range = initializer_range
+        self.initializer_factor = initializer_factor
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig":
+
+        config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
+
+        # get the vision config dict if we are loading from OwlViTConfig
+        if config_dict.get("model_type") == "owlvit":
+            config_dict = config_dict["vision_config"]
+
+        if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type:
+            logger.warning(
+                f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
+                f"{cls.model_type}. This is not supported for all configurations of models and can yield errors."
+            )
+
+        return cls.from_dict(config_dict, **kwargs)
+
+
+class OwlViTConfig(PretrainedConfig):
+    r"""
+    [`OwlViTConfig`] is the configuration class to store the configuration of an [`OwlViTModel`]. It is used to
+    instantiate an OWL-ViT model according to the specified arguments, defining the text model and vision model
+    configs.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        text_config_dict (`dict`, *optional*):
+            Dictionary of configuration options used to initialize [`OwlViTTextConfig`].
+        vision_config_dict (`dict`, *optional*):
+            Dictionary of configuration options used to initialize [`OwlViTVisionConfig`].
+        projection_dim (`int`, *optional*, defaults to 512):
+            Dimensionality of text and vision projection layers.
+        logit_scale_init_value (`float`, *optional*, defaults to 2.6592):
+            The inital value of the *logit_scale* parameter. Default is used as per the original OWL-ViT
+            implementation.
+        kwargs (*optional*):
+            Dictionary of keyword arguments.
+    """
+
+    model_type = "owlvit"
+    is_composition = True
+
+    def __init__(
+        self,
+        text_config=None,
+        vision_config=None,
+        projection_dim=512,
+        logit_scale_init_value=2.6592,
+        return_dict=True,
+        **kwargs
+    ):
+        super().__init__(text_config=text_config, vision_config=vision_config, **kwargs)
+
+        if text_config is None:
+            text_config = {}
+            logger.info("text_config_dict is None. Initializing the OwlViTTextConfig with default values.")
+
+        if vision_config is None:
+            vision_config = {}
+            logger.info("vision_config_dict is None. initializing the OwlViTVisionConfig with default values.")
+
+        self.text_config = OwlViTTextConfig(**text_config)
+        self.vision_config = OwlViTVisionConfig(**vision_config)
+
+        self.projection_dim = projection_dim
+        self.logit_scale_init_value = logit_scale_init_value
+        self.return_dict = return_dict
+        self.initializer_factor = 1.0
+
+    @classmethod
+    def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> "PretrainedConfig":
+        config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
+
+        if "model_type" in config_dict and hasattr(cls, "model_type") and config_dict["model_type"] != cls.model_type:
+            logger.warning(
+                f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
+                f"{cls.model_type}. This is not supported for all configurations of models and can yield errors."
+            )
+
+        return cls.from_dict(config_dict, **kwargs)
+
+    @classmethod
+    def from_text_vision_configs(cls, text_config: Dict, vision_config: Dict, **kwargs):
+        r"""
+        Instantiate a [`OwlViTConfig`] (or a derived class) from owlvit text model configuration and owlvit vision
+        model configuration.
+
+        Returns:
+            [`OwlViTConfig`]: An instance of a configuration object
+        """
+        config_dict = {}
+        config_dict["text_config"] = text_config
+        config_dict["vision_config"] = vision_config
+
+        return cls.from_dict(config_dict, **kwargs)
+
+    def to_dict(self):
+        """
+        Serializes this instance to a Python dictionary. Override the default [`~PretrainedConfig.to_dict`].
+
+        Returns:
+            `Dict[str, any]`: Dictionary of all the attributes that make up this configuration instance,
+        """
+        output = copy.deepcopy(self.__dict__)
+        output["text_config"] = self.text_config.to_dict()
+        output["vision_config"] = self.vision_config.to_dict()
+        output["model_type"] = self.__class__.model_type
+        return output

src/transformers/models/owlvit/convert_owlvit_original_flax_to_hf.py

+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Convert OWL-ViT checkpoints from the original repository. URL:
+https://github.com/google-research/scenic/tree/main/scenic/projects/owl_vit"""
+
+import argparse
+import collections
+
+import torch
+import torch.nn as nn
+
+import jax
+import jax.numpy as jnp
+from clip.model import CLIP
+from flax.training import checkpoints
+from huggingface_hub import Repository
+from transformers import (
+    CLIPTokenizer,
+    OwlViTConfig,
+    OwlViTFeatureExtractor,
+    OwlViTForObjectDetection,
+    OwlViTModel,
+    OwlViTProcessor,
+)
+
+
+CONFIGS = {
+    "vit_b32": dict(
+        embed_dim=512,
+        image_resolution=768,
+        context_length=16,
+        vocab_size=49408,
+        vision_layers=12,
+        vision_width=768,
+        vision_patch_size=32,
+        transformer_width=512,
+        transformer_heads=8,
+        transformer_layers=12,
+    ),
+    "vit_b16": dict(
+        embed_dim=512,
+        image_resolution=768,
+        context_length=16,
+        vocab_size=49408,
+        vision_layers=12,
+        vision_width=768,
+        vision_patch_size=16,
+        transformer_width=512,
+        transformer_heads=8,
+        transformer_layers=12,
+    ),
+    "vit_l14": dict(
+        embed_dim=768,
+        image_resolution=840,
+        context_length=16,
+        vocab_size=49408,
+        vision_layers=24,
+        vision_width=1024,
+        vision_patch_size=14,
+        transformer_width=768,
+        transformer_heads=12,
+        transformer_layers=12,
+    ),
+}
+
+
+def flatten_nested_dict(params, parent_key="", sep="/"):
+    items = []
+
+    for k, v in params.items():
+        new_key = parent_key + sep + k if parent_key else k
+
+        if isinstance(v, collections.MutableMapping):
+            items.extend(flatten_nested_dict(v, new_key, sep=sep).items())
+        else:
+            items.append((new_key, v))
+    return dict(items)
+
+
+def to_f32(params):
+    return jax.tree_map(lambda x: x.astype(jnp.float32) if x.dtype == jnp.bfloat16 else x, params)
+
+
+def copy_attn_layer(hf_attn_layer, pt_attn_layer):
+    q_proj, k_proj, v_proj = pt_attn_layer.in_proj_weight.chunk(3, dim=0)
+    q_proj_bias, k_proj_bias, v_proj_bias = pt_attn_layer.in_proj_bias.chunk(3, dim=0)
+
+    out_proj_weights = pt_attn_layer.out_proj.weight
+    out_proj_bias = pt_attn_layer.out_proj.bias
+
+    hf_attn_layer.q_proj.weight.data = q_proj
+    hf_attn_layer.q_proj.bias.data = q_proj_bias
+
+    hf_attn_layer.k_proj.weight.data = k_proj
+    hf_attn_layer.k_proj.bias.data = k_proj_bias
+
+    hf_attn_layer.v_proj.weight.data = v_proj
+    hf_attn_layer.v_proj.bias.data = v_proj_bias
+
+    hf_attn_layer.out_proj.weight = out_proj_weights
+    hf_attn_layer.out_proj.bias = out_proj_bias
+
+
+def copy_mlp(hf_mlp, pt_mlp):
+    copy_linear(hf_mlp.fc1, pt_mlp.c_fc)
+    copy_linear(hf_mlp.fc2, pt_mlp.c_proj)
+
+
+def copy_linear(hf_linear, pt_linear):
+    hf_linear.weight = pt_linear.weight
+    hf_linear.bias = pt_linear.bias
+
+
+def copy_layer(hf_layer, pt_layer):
+    # copy layer norms
+    copy_linear(hf_layer.layer_norm1, pt_layer.ln_1)
+    copy_linear(hf_layer.layer_norm2, pt_layer.ln_2)
+
+    # copy MLP
+    copy_mlp(hf_layer.mlp, pt_layer.mlp)
+
+    # copy attn
+    copy_attn_layer(hf_layer.self_attn, pt_layer.attn)
+
+
+def copy_layers(hf_layers, pt_layers):
+    for hf_layer, pt_layer in zip(hf_layers, pt_layers):
+        copy_layer(hf_layer, pt_layer)
+
+
+def copy_encoder(hf_encoder, pt_model):
+    # copy  embeds
+    hf_encoder.embeddings.token_embedding.weight = pt_model.token_embedding.weight
+    hf_encoder.embeddings.position_embedding.weight.data = pt_model.positional_embedding
+
+    # copy layer norm
+    copy_linear(hf_encoder.final_layer_norm, pt_model.ln_final)
+
+    # copy hidden layers
+    copy_layers(hf_encoder.encoder.layers, pt_model.transformer.resblocks)
+
+
+def copy_text_model_and_projection(hf_model, pt_model):
+    # copy projection
+    hf_model.text_projection.weight.data = pt_model.text_projection.data.T
+
+    # copy text encoder
+    copy_encoder(hf_model.text_model, pt_model)
+
+
+def copy_vision_model_and_projection(hf_model, pt_model):
+    # copy projection
+    hf_model.visual_projection.weight.data = pt_model.visual.proj.data.T
+
+    # copy layer norms
+    copy_linear(hf_model.vision_model.pre_layernorm, pt_model.visual.ln_pre)
+    copy_linear(hf_model.vision_model.post_layernorm, pt_model.visual.ln_post)
+
+    # copy embeds
+    hf_model.vision_model.embeddings.patch_embedding.weight.data = pt_model.visual.conv1.weight.data
+    hf_model.vision_model.embeddings.class_embedding = pt_model.visual.class_embedding
+    hf_model.vision_model.embeddings.position_embedding.weight.data = pt_model.visual.positional_embedding.data
+
+    # copy encoder
+    copy_layers(hf_model.vision_model.encoder.layers, pt_model.visual.transformer.resblocks)
+
+
+def copy_class_merge_token(hf_model, flax_params):
+    flax_class_token_params = flatten_nested_dict(flax_params["backbone"]["merged_class_token"])
+
+    weight = torch.from_numpy(flax_class_token_params["scale"])
+    bias = torch.from_numpy(flax_class_token_params["bias"])
+    hf_model.layer_norm.weight = nn.Parameter(weight)
+    hf_model.layer_norm.bias = nn.Parameter(bias)
+
+
+def copy_class_box_heads(hf_model, flax_params):
+    pt_params = hf_model.state_dict()
+    new_params = {}
+
+    # Rename class prediction head flax params to pytorch HF
+    flax_class_params = flatten_nested_dict(flax_params["class_head"])
+
+    for flax_key, v in flax_class_params.items():
+        torch_key = flax_key.replace("/", ".")
+        torch_key = torch_key.replace(".kernel", ".weight")
+        torch_key = torch_key.replace("Dense_0", "dense0")
+        torch_key = "class_head." + torch_key
+
+        if "weight" in torch_key and v.ndim == 2:
+            v = v.T
+
+        new_params[torch_key] = nn.Parameter(torch.from_numpy(v))
+
+    # Rename box prediction box flax params to pytorch HF
+    flax_box_params = flatten_nested_dict(flax_params["obj_box_head"])
+
+    for flax_key, v in flax_box_params.items():
+        torch_key = flax_key.replace("/", ".")
+        torch_key = torch_key.replace(".kernel", ".weight")
+        torch_key = torch_key.replace("_", "").lower()
+        torch_key = "box_head." + torch_key
+
+        if "weight" in torch_key and v.ndim == 2:
+            v = v.T
+
+        new_params[torch_key] = nn.Parameter(torch.from_numpy(v))
+
+    # Copy flax params to PyTorch params
+    for name, param in new_params.items():
+        if name in pt_params.keys():
+            pt_params[name].copy_(param)
+
+
+def copy_flax_attn_params(hf_backbone, flax_attn_params):
+    for k, v in flax_attn_params.items():
+        if k.startswith("transformer"):
+            torch_key = k.replace("transformer.resblocks", "text_model.encoder.layers")
+        else:
+            torch_key = k.replace("visual.transformer.resblocks", "vision_model.encoder.layers")
+
+        torch_key = torch_key.replace("attn", "self_attn")
+        torch_key = torch_key.replace("key", "k_proj")
+        torch_key = torch_key.replace("value", "v_proj")
+        torch_key = torch_key.replace("query", "q_proj")
+        torch_key = torch_key.replace("out", "out_proj")
+
+        if "bias" in torch_key and v.ndim == 2:
+            shape = v.shape[0] * v.shape[1]
+            v = v.reshape(shape)
+
+        if "weight" in torch_key and "out" in torch_key:
+            shape = (v.shape[0] * v.shape[1], v.shape[2])
+            v = v.reshape(shape).T
+
+        if "weight" in torch_key and "out" not in torch_key:
+            shape = (v.shape[0], v.shape[1] * v.shape[2])
+            v = v.reshape(shape).T
+
+        # Copy flax CLIP attn params to HF PyTorch params
+        v = torch.from_numpy(v)
+        hf_backbone.state_dict()[torch_key].copy_(v)
+
+
+def _convert_attn_layers(params):
+    new_params = {}
+    processed_attn_layers = []
+
+    for k, v in params.items():
+        if "attn." in k:
+            base = k[: k.rindex("attn.") + 5]
+            if base in processed_attn_layers:
+                continue
+
+            processed_attn_layers.append(base)
+            dim = params[base + "out.weight"].shape[-1]
+            new_params[base + "out_proj.weight"] = params[base + "out.weight"].reshape(dim, dim).T
+            new_params[base + "out_proj.bias"] = params[base + "out.bias"]
+        else:
+            new_params[k] = v
+    return new_params
+
+
+def convert_clip_backbone(flax_params, torch_config):
+    torch_model = CLIP(**torch_config)
+    torch_model.eval()
+    torch_clip_params = torch_model.state_dict()
+
+    flax_clip_params = flatten_nested_dict(flax_params["backbone"]["clip"])
+    new_torch_params = {}
+
+    for flax_key, v in flax_clip_params.items():
+        torch_key = flax_key.replace("/", ".")
+        torch_key = torch_key.replace("text.token_embedding.embedding", "token_embedding.kernel")
+
+        if (
+            torch_key.startswith("text.transformer")
+            or torch_key.startswith("text.text_projection")
+            or torch_key.startswith("text.ln_final")
+            or torch_key.startswith("text.positional_embedding")
+        ):
+            torch_key = torch_key[5:]
+
+        torch_key = torch_key.replace("text_projection.kernel", "text_projection")
+        torch_key = torch_key.replace("visual.proj.kernel", "visual.proj")
+        torch_key = torch_key.replace(".scale", ".weight")
+        torch_key = torch_key.replace(".kernel", ".weight")
+
+        if "conv" in torch_key or "downsample.0.weight" in torch_key:
+            v = v.transpose(3, 2, 0, 1)
+
+        elif "weight" in torch_key and v.ndim == 2 and "embedding" not in torch_key:
+            # Fully connected layers are transposed, embeddings are not
+            v = v.T
+
+        new_torch_params[torch_key] = v
+
+    attn_params = _convert_attn_layers(new_torch_params)
+    new_torch_params.update(attn_params)
+    attn_params = {}
+
+    # Copy flax CLIP backbone params to PyTorch params
+    for name, param in new_torch_params.items():
+        if name in torch_clip_params.keys():
+
+            new_param = torch.from_numpy(new_torch_params[name])
+            torch_clip_params[name].copy_(new_param)
+        else:
+            attn_params[name] = param
+
+    return torch_clip_params, torch_model, attn_params
+
+
+@torch.no_grad()
+def convert_owlvit_checkpoint(pt_backbone, flax_params, attn_params, pytorch_dump_folder_path, config_path=None):
+    """
+    Copy/paste/tweak model's weights to transformers design.
+    """
+    repo = Repository(pytorch_dump_folder_path, clone_from=f"google/{pytorch_dump_folder_path}")
+    repo.git_pull()
+
+    if config_path is not None:
+        config = OwlViTConfig.from_pretrained(config_path)
+    else:
+        config = OwlViTConfig()
+
+    hf_backbone = OwlViTModel(config).eval()
+    hf_model = OwlViTForObjectDetection(config).eval()
+
+    copy_text_model_and_projection(hf_backbone, pt_backbone)
+    copy_vision_model_and_projection(hf_backbone, pt_backbone)
+    hf_backbone.logit_scale = pt_backbone.logit_scale
+    copy_flax_attn_params(hf_backbone, attn_params)
+
+    hf_model.owlvit = hf_backbone
+    copy_class_merge_token(hf_model, flax_params)
+    copy_class_box_heads(hf_model, flax_params)
+
+    # Save HF model
+    hf_model.save_pretrained(repo.local_dir)
+
+    # Initialize feature extractor
+    feature_extractor = OwlViTFeatureExtractor(
+        size=config.vision_config.image_size, crop_size=config.vision_config.image_size
+    )
+    # Initialize tokenizer
+    tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-base-patch32", pad_token="!", model_max_length=16)
+
+    # Initialize processor
+    processor = OwlViTProcessor(feature_extractor=feature_extractor, tokenizer=tokenizer)
+    feature_extractor.save_pretrained(repo.local_dir)
+    processor.save_pretrained(repo.local_dir)
+
+    repo.git_add()
+    repo.git_commit("Upload model and processor")
+    repo.git_push()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    # Required parameters
+    parser.add_argument(
+        "--owlvit_version",
+        default=None,
+        type=str,
+        required=True,
+        help="OWL-ViT model name [clip_b16, clip_b32, clip_l14].",
+    )
+    parser.add_argument(
+        "--owlvit_checkpoint", default=None, type=str, required=True, help="Path to flax model checkpoint."
+    )
+    parser.add_argument("--hf_config", default=None, type=str, required=True, help="Path to HF model config.")
+    parser.add_argument(
+        "--pytorch_dump_folder_path", default="hf_model", type=str, help="Path to the output PyTorch model."
+    )
+    args = parser.parse_args()
+
+    # Initialize PyToch clip model
+    model_name = args.owlvit_version
+    if model_name == "clip_b16":
+        torch_config = CONFIGS["vit_b16"]
+    elif model_name == "clip_b32":
+        torch_config = CONFIGS["vit_b32"]
+    elif model_name == "clip_l14":
+        torch_config = CONFIGS["vit_l14"]
+
+    # Load from checkpoint and convert params to float-32
+    variables = checkpoints.restore_checkpoint(args.owlvit_checkpoint, target=None)["optimizer"]["target"]
+    flax_params = jax.tree_map(lambda x: x.astype(jnp.float32) if x.dtype == jnp.bfloat16 else x, variables)
+    del variables
+
+    # Convert CLIP backbone
+    pt_backbone_params, clip_pt, attn_params = convert_clip_backbone(flax_params, torch_config)
+
+    convert_owlvit_checkpoint(clip_pt, flax_params, attn_params, args.pytorch_dump_folder_path, args.hf_config)

src/transformers/models/owlvit/feature_extraction_owlvit.py

+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Feature extractor class for OwlViT."""
+
+from typing import List, Optional, Union
+
+import numpy as np
+from PIL import Image
+
+from ...feature_extraction_utils import BatchFeature, FeatureExtractionMixin
+from ...image_utils import ImageFeatureExtractionMixin, is_torch_tensor
+from ...utils import TensorType, is_torch_available, logging
+
+
+if is_torch_available():
+    import torch
+    from torch import nn
+
+logger = logging.get_logger(__name__)
+
+
+def center_to_corners_format(x):
+    """
+    Converts a PyTorch tensor of bounding boxes of center format (center_x, center_y, width, height) to corners format
+    (left, top, right, bottom).
+    """
+    x_center, y_center, width, height = x.unbind(-1)
+    boxes = [(x_center - 0.5 * width), (y_center - 0.5 * height), (x_center + 0.5 * width), (y_center + 0.5 * height)]
+    return torch.stack(boxes, dim=-1)
+
+
+class OwlViTFeatureExtractor(FeatureExtractionMixin, ImageFeatureExtractionMixin):
+    r"""
+    Constructs an OWL-ViT feature extractor.
+
+    This feature extractor inherits from [`FeatureExtractionMixin`] which contains most of the main methods. Users
+    should refer to this superclass for more information regarding those methods.
+
+    Args:
+        do_resize (`bool`, *optional*, defaults to `True`):
+            Whether to resize the shorter edge of the input to a certain `size`.
+        size (`int`, *optional*, defaults to 768):
+            Resize the shorter edge of the input to the given size. Only has an effect if `do_resize` is set to `True`.
+        resample (`int`, *optional*, defaults to `PIL.Image.BICUBIC`):
+            An optional resampling filter. This can be one of `PIL.Image.NEAREST`, `PIL.Image.BOX`,
+            `PIL.Image.BILINEAR`, `PIL.Image.HAMMING`, `PIL.Image.BICUBIC` or `PIL.Image.LANCZOS`. Only has an effect
+            if `do_resize` is set to `True`.
+        do_center_crop (`bool`, *optional*, defaults to `True`):
+            Whether to crop the input at the center. If the input size is smaller than `crop_size` along any edge, the
+            image is padded with 0's and then center cropped.
+        crop_size (`int`, *optional*, defaults to 768):
+        do_normalize (`bool`, *optional*, defaults to `True`):
+            Whether or not to normalize the input with `image_mean` and `image_std`. Desired output size when applying
+            center-cropping. Only has an effect if `do_center_crop` is set to `True`.
+        image_mean (`List[int]`, *optional*, defaults to `[0.48145466, 0.4578275, 0.40821073]`):
+            The sequence of means for each channel, to be used when normalizing images.
+        image_std (`List[int]`, *optional*, defaults to `[0.26862954, 0.26130258, 0.27577711]`):
+            The sequence of standard deviations for each channel, to be used when normalizing images.
+    """
+
+    model_input_names = ["pixel_values"]
+
+    def __init__(
+        self,
+        do_resize=True,
+        size=768,
+        resample=Image.BICUBIC,
+        crop_size=768,
+        do_center_crop=True,
+        do_normalize=True,
+        image_mean=None,
+        image_std=None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        self.size = size
+        self.resample = resample
+        self.crop_size = crop_size
+        self.do_resize = do_resize
+        self.do_center_crop = do_center_crop
+        self.do_normalize = do_normalize
+        self.image_mean = image_mean if image_mean is not None else [0.48145466, 0.4578275, 0.40821073]
+        self.image_std = image_std if image_std is not None else [0.26862954, 0.26130258, 0.27577711]
+
+    def post_process(self, outputs, target_sizes):
+        """
+        Converts the output of [`OwlViTForObjectDetection`] into the format expected by the COCO api.
+
+        Args:
+            outputs ([`OwlViTObjectDetectionOutput`]):
+                Raw outputs of the model.
+            target_sizes (`torch.Tensor` of shape `(batch_size, 2)`):
+                Tensor containing the size (h, w) of each image of the batch. For evaluation, this must be the original
+                image size (before any data augmentation). For visualization, this should be the image size after data
+                augment, but before padding.
+        Returns:
+            `List[Dict]`: A list of dictionaries, each dictionary containing the scores, labels and boxes for an image
+            in the batch as predicted by the model.
+        """
+        out_logits, out_bbox = outputs.logits, outputs.pred_boxes
+
+        if len(out_logits) != len(target_sizes):
+            raise ValueError("Make sure that you pass in as many target sizes as the batch dimension of the logits")
+        if target_sizes.shape[1] != 2:
+            raise ValueError("Each element of target_sizes must contain the size (h, w) of each image of the batch")
+
+        prob = nn.functional.softmax(out_logits, -1)
+        scores, labels = prob[..., :-1].max(-1)
+
+        # Convert to [x0, y0, x1, y1] format
+        boxes = center_to_corners_format(out_bbox)
+
+        # Convert from relative [0, 1] to absolute [0, height] coordinates
+        img_h, img_w = target_sizes.unbind(1)
+        scale_fct = torch.stack([img_w, img_h, img_w, img_h], dim=1)
+        boxes = boxes * scale_fct[:, None, :]
+
+        results = [{"scores": s, "labels": l, "boxes": b} for s, l, b in zip(scores, labels, boxes)]
+
+        return results
+
+    def __call__(
+        self,
+        images: Union[
+            Image.Image, np.ndarray, "torch.Tensor", List[Image.Image], List[np.ndarray], List["torch.Tensor"]  # noqa
+        ],
+        return_tensors: Optional[Union[str, TensorType]] = None,
+        **kwargs
+    ) -> BatchFeature:
+        """
+        Main method to prepare for the model one or several image(s).
+
+        <Tip warning={true}>
+
+        NumPy arrays and PyTorch tensors are converted to PIL images when resizing, so the most efficient is to pass
+        PIL images.
+
+        </Tip>
+
+        Args:
+            images (`PIL.Image.Image`, `np.ndarray`, `torch.Tensor`, `List[PIL.Image.Image]`, `List[np.ndarray]`, `List[torch.Tensor]`):
+                The image or batch of images to be prepared. Each image can be a PIL image, NumPy array or PyTorch
+                tensor. In case of a NumPy array/PyTorch tensor, each image should be of shape (C, H, W) or (H, W, C),
+                where C is a number of channels, H and W are image height and width.
+
+            return_tensors (`str` or [`~utils.TensorType`], *optional*, defaults to `'np'`):
+                If set, will return tensors of a particular framework. Acceptable values are:
+
+                - `'tf'`: Return TensorFlow `tf.constant` objects.
+                - `'pt'`: Return PyTorch `torch.Tensor` objects.
+                - `'np'`: Return NumPy `np.ndarray` objects.
+                - `'jax'`: Return JAX `jnp.ndarray` objects.
+
+        Returns:
+            [`BatchFeature`]: A [`BatchFeature`] with the following fields:
+
+            - **pixel_values** -- Pixel values to be fed to a model.
+        """
+        # Input type checking for clearer error
+        valid_images = False
+
+        # Check that images has a valid type
+        if isinstance(images, (Image.Image, np.ndarray)) or is_torch_tensor(images):
+            valid_images = True
+        elif isinstance(images, (list, tuple)):
+            if isinstance(images[0], (Image.Image, np.ndarray)) or is_torch_tensor(images[0]):
+                valid_images = True
+
+        if not valid_images:
+            raise ValueError(
+                "Images must of type `PIL.Image.Image`, `np.ndarray` or `torch.Tensor` (single example), "
+                "`List[PIL.Image.Image]`, `List[np.ndarray]` or `List[torch.Tensor]` (batch of examples)."
+            )
+
+        is_batched = bool(
+            isinstance(images, (list, tuple))
+            and (isinstance(images[0], (Image.Image, np.ndarray)) or is_torch_tensor(images[0]))
+        )
+
+        if not is_batched:
+            images = [images]
+
+        # transformations (resizing + center cropping + normalization)
+        if self.do_resize and self.size is not None and self.resample is not None:
+            images = [
+                self.resize(image=image, size=self.size, resample=self.resample, default_to_square=False)
+                for image in images
+            ]
+        if self.do_center_crop and self.crop_size is not None:
+            images = [self.center_crop(image, self.crop_size) for image in images]
+        if self.do_normalize:
+            images = [self.normalize(image=image, mean=self.image_mean, std=self.image_std) for image in images]
+
+        # return as BatchFeature
+        data = {"pixel_values": images}
+        encoded_inputs = BatchFeature(data=data, tensor_type=return_tensors)
+
+        return encoded_inputs