fix vanilla tensor image detection (#5518)

* fix vanilla tensor image detection

* fix naming
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

torchvision/prototype/transforms/_augment.py

@@ -7,7 +7,7 @@ import torch
 from torchvision.prototype import features
 from torchvision.prototype.transforms import Transform, functional as F
 
-from ._utils import query_image, get_image_dimensions, has_all, has_any
+from ._utils import query_image, get_image_dimensions, has_all, has_any, is_simple_tensor
 
 
 class RandomErasing(Transform):
@@ -90,7 +90,7 @@ class RandomErasing(Transform):
         if isinstance(input, features.Image):
             output = F.erase_image_tensor(input, **params)
             return features.Image.new_like(input, output)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return F.erase_image_tensor(input, **params)
         else:
             return input

torchvision/prototype/transforms/_auto_augment.py

@@ -8,7 +8,7 @@ from torchvision.prototype.transforms import Transform, InterpolationMode, AutoA
 from torchvision.prototype.utils._internal import query_recursively
 from torchvision.transforms.functional import pil_to_tensor, to_pil_image
 
-from ._utils import get_image_dimensions
+from ._utils import get_image_dimensions, is_simple_tensor
 
 K = TypeVar("K")
 V = TypeVar("V")
@@ -89,7 +89,7 @@ class _AutoAugmentBase(Transform):
         if isinstance(input, features.Image):
             output = image_tensor_kernel(input, *args, **kwargs)
             return features.Image.new_like(input, output)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return image_tensor_kernel(input, *args, **kwargs)
         else:  # isinstance(input, PIL.Image.Image):
             return image_pil_kernel(input, *args, **kwargs)

torchvision/prototype/transforms/_geometry.py

@@ -8,7 +8,7 @@ from torchvision.prototype import features
 from torchvision.prototype.transforms import Transform, InterpolationMode, functional as F
 from torchvision.transforms.transforms import _setup_size, _interpolation_modes_from_int
 
-from ._utils import query_image, get_image_dimensions, has_any
+from ._utils import query_image, get_image_dimensions, has_any, is_simple_tensor
 
 
 class HorizontalFlip(Transform):
@@ -21,7 +21,7 @@ class HorizontalFlip(Transform):
             return features.BoundingBox.new_like(input, output)
         elif isinstance(input, PIL.Image.Image):
             return F.horizontal_flip_image_pil(input)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return F.horizontal_flip_image_tensor(input)
         else:
             return input
@@ -49,7 +49,7 @@ class Resize(Transform):
             return features.BoundingBox.new_like(input, output, image_size=cast(Tuple[int, int], tuple(self.size)))
         elif isinstance(input, PIL.Image.Image):
             return F.resize_image_pil(input, self.size, interpolation=self.interpolation)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return F.resize_image_tensor(input, self.size, interpolation=self.interpolation)
         else:
             return input
@@ -64,7 +64,7 @@ class CenterCrop(Transform):
         if isinstance(input, features.Image):
             output = F.center_crop_image_tensor(input, self.output_size)
             return features.Image.new_like(input, output)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return F.center_crop_image_tensor(input, self.output_size)
         elif isinstance(input, PIL.Image.Image):
             return F.center_crop_image_pil(input, self.output_size)
@@ -156,7 +156,7 @@ class RandomResizedCrop(Transform):
                 input, **params, size=list(self.size), interpolation=self.interpolation
             )
             return features.Image.new_like(input, output)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             return F.resized_crop_image_tensor(input, **params, size=list(self.size), interpolation=self.interpolation)
         elif isinstance(input, PIL.Image.Image):
             return F.resized_crop_image_pil(input, **params, size=list(self.size), interpolation=self.interpolation)

torchvision/prototype/transforms/_meta.py

@@ -6,6 +6,8 @@ from torchvision.prototype import features
 from torchvision.prototype.transforms import Transform, functional as F
 from torchvision.transforms.functional import convert_image_dtype
 
+from ._utils import is_simple_tensor
+
 
 class ConvertBoundingBoxFormat(Transform):
     def __init__(self, format: Union[str, features.BoundingBoxFormat]) -> None:
@@ -15,7 +17,7 @@ class ConvertBoundingBoxFormat(Transform):
         self.format = format
 
     def _transform(self, input: Any, params: Dict[str, Any]) -> Any:
-        if type(input) is features.BoundingBox:
+        if isinstance(input, features.BoundingBox):
             output = F.convert_bounding_box_format(input, old_format=input.format, new_format=params["format"])
             return features.BoundingBox.new_like(input, output, format=params["format"])
         else:
@@ -28,9 +30,11 @@ class ConvertImageDtype(Transform):
         self.dtype = dtype
 
     def _transform(self, input: Any, params: Dict[str, Any]) -> Any:
-        if type(input) is features.Image:
+        if isinstance(input, features.Image):
             output = convert_image_dtype(input, dtype=self.dtype)
             return features.Image.new_like(input, output, dtype=self.dtype)
+        elif is_simple_tensor(input):
+            return convert_image_dtype(input, dtype=self.dtype)
         else:
             return input
 
@@ -57,7 +61,7 @@ class ConvertImageColorSpace(Transform):
                 input, old_color_space=input.color_space, new_color_space=self.color_space
             )
             return features.Image.new_like(input, output, color_space=self.color_space)
-        elif isinstance(input, torch.Tensor):
+        elif is_simple_tensor(input):
             if self.old_color_space is None:
                 raise RuntimeError(
                     f"In order to convert vanilla tensor images, `{type(self).__name__}(...)` "

torchvision/prototype/transforms/_type_conversion.py

@@ -6,7 +6,7 @@ from torchvision.prototype.transforms import Transform, functional as F
 
 class DecodeImage(Transform):
     def _transform(self, input: Any, params: Dict[str, Any]) -> Any:
-        if type(input) is features.EncodedImage:
+        if isinstance(input, features.EncodedImage):
             output = F.decode_image_with_pil(input)
             return features.Image(output)
         else:
@@ -19,7 +19,7 @@ class LabelToOneHot(Transform):
         self.num_categories = num_categories
 
     def _transform(self, input: Any, params: Dict[str, Any]) -> Any:
-        if type(input) is features.Label:
+        if isinstance(input, features.Label):
             num_categories = self.num_categories
             if num_categories == -1 and input.categories is not None:
                 num_categories = len(input.categories)

torchvision/prototype/transforms/_utils.py

@@ -46,3 +46,7 @@ def has_any(sample: Any, *types: Type) -> bool:
 
 def has_all(sample: Any, *types: Type) -> bool:
     return not bool(set(types) - set(_extract_types(sample)))
+
+
+def is_simple_tensor(input: Any) -> bool:
+    return isinstance(input, torch.Tensor) and not isinstance(input, features._Feature)