MaskFormer post_process_instance_segmentation bug fix convert out side of loop (#25497)

Bug fix - convert out side of loop

src/transformers/models/mask2former/image_processing_mask2former.py

@@ -1026,6 +1026,7 @@ class Mask2FormerImageProcessor(BaseImageProcessor):
                     )
                     current_segment_id += 1
                     instance_maps.append(pred_masks[j])
+
             # Return segmentation map in run-length encoding (RLE) format
             if return_coco_annotation:
                 segmentation = convert_segmentation_to_rle(segmentation)

src/transformers/models/maskformer/image_processing_maskformer.py

@@ -1081,6 +1081,7 @@ class MaskFormerImageProcessor(BaseImageProcessor):
                     )
                     current_segment_id += 1
                     instance_maps.append(pred_masks[j])
+
             # Return segmentation map in run-length encoding (RLE) format
             if return_coco_annotation:
                 segmentation = convert_segmentation_to_rle(segmentation)