diffs/34836.patch

diff --git a/docs/source/en/_config.py b/docs/source/en/_config.py
index 4381def017dd..f49e4e473196 100644
--- a/docs/source/en/_config.py
+++ b/docs/source/en/_config.py
@@ -11,4 +11,4 @@
     "{processor_class}": "FakeProcessorClass",
     "{model_class}": "FakeModelClass",
     "{object_class}": "FakeObjectClass",
-}
\ No newline at end of file
+}
diff --git a/docs/source/en/model_doc/pixtral.md b/docs/source/en/model_doc/pixtral.md
index ab604e4521fc..62bdc004c517 100644
--- a/docs/source/en/model_doc/pixtral.md
+++ b/docs/source/en/model_doc/pixtral.md
@@ -88,6 +88,11 @@ output = processor.batch_decode(generate_ids, skip_special_tokens=True, clean_up
 [[autodoc]] PixtralImageProcessor
     - preprocess
 
+## PixtralImageProcessorFast
+
+[[autodoc]] PixtralImageProcessorFast
+    - preprocess
+
 ## PixtralProcessor
 
 [[autodoc]] PixtralProcessor
diff --git a/src/transformers/__init__.py b/src/transformers/__init__.py
index fa54ced6a134..9db2e2c51f6c 100755
--- a/src/transformers/__init__.py
+++ b/src/transformers/__init__.py
@@ -1260,6 +1260,7 @@
     _import_structure["image_processing_utils_fast"] = ["BaseImageProcessorFast"]
     _import_structure["models.deformable_detr"].append("DeformableDetrImageProcessorFast")
     _import_structure["models.detr"].append("DetrImageProcessorFast")
+    _import_structure["models.pixtral"].append("PixtralImageProcessorFast")
     _import_structure["models.rt_detr"].append("RTDetrImageProcessorFast")
     _import_structure["models.vit"].append("ViTImageProcessorFast")
 
@@ -6189,6 +6190,7 @@
         from .image_processing_utils_fast import BaseImageProcessorFast
         from .models.deformable_detr import DeformableDetrImageProcessorFast
         from .models.detr import DetrImageProcessorFast
+        from .models.pixtral import PixtralImageProcessorFast
         from .models.rt_detr import RTDetrImageProcessorFast
         from .models.vit import ViTImageProcessorFast
 
diff --git a/src/transformers/image_utils.py b/src/transformers/image_utils.py
index f59b99b490d3..51199d9f3698 100644
--- a/src/transformers/image_utils.py
+++ b/src/transformers/image_utils.py
@@ -24,6 +24,7 @@
 
 from .utils import (
     ExplicitEnum,
+    TensorType,
     is_jax_tensor,
     is_numpy_array,
     is_tf_tensor,
@@ -447,6 +448,44 @@ def validate_preprocess_arguments(
         raise ValueError("`size` and `resample` must be specified if `do_resize` is `True`.")
 
 
+def validate_fast_preprocess_arguments(
+    do_rescale: Optional[bool] = None,
+    rescale_factor: Optional[float] = None,
+    do_normalize: Optional[bool] = None,
+    image_mean: Optional[Union[float, List[float]]] = None,
+    image_std: Optional[Union[float, List[float]]] = None,
+    do_pad: Optional[bool] = None,
+    size_divisibility: Optional[int] = None,
+    do_center_crop: Optional[bool] = None,
+    crop_size: Optional[Dict[str, int]] = None,
+    do_resize: Optional[bool] = None,
+    size: Optional[Dict[str, int]] = None,
+    resample: Optional["PILImageResampling"] = None,
+    return_tensors: Optional[Union[str, TensorType]] = None,
+    data_format: Optional[ChannelDimension] = ChannelDimension.FIRST,
+):
+    """
+    Checks validity of typically used arguments in an `ImageProcessorFast` `preprocess` method.
+    Raises `ValueError` if arguments incompatibility is caught.
+    """
+    validate_preprocess_arguments(
+        do_rescale=do_rescale,
+        rescale_factor=rescale_factor,
+        do_normalize=do_normalize,
+        image_mean=image_mean,
+        image_std=image_std,
+        do_resize=do_resize,
+        size=size,
+        resample=resample,
+    )
+    # Extra checks for ImageProcessorFast
+    if return_tensors != "pt":
+        raise ValueError("Only returning PyTorch tensors is currently supported.")
+
+    if data_format != ChannelDimension.FIRST:
+        raise ValueError("Only channel first data format is currently supported.")
+
+
 # In the future we can add a TF implementation here when we have TF models.
 class ImageFeatureExtractionMixin:
     """
diff --git a/src/transformers/models/auto/image_processing_auto.py b/src/transformers/models/auto/image_processing_auto.py
index 0b180272bdb0..11ae15ca461e 100644
--- a/src/transformers/models/auto/image_processing_auto.py
+++ b/src/transformers/models/auto/image_processing_auto.py
@@ -117,7 +117,7 @@
             ("paligemma", ("SiglipImageProcessor",)),
             ("perceiver", ("PerceiverImageProcessor",)),
             ("pix2struct", ("Pix2StructImageProcessor",)),
-            ("pixtral", ("PixtralImageProcessor",)),
+            ("pixtral", ("PixtralImageProcessor", "PixtralImageProcessorFast")),
             ("poolformer", ("PoolFormerImageProcessor",)),
             ("pvt", ("PvtImageProcessor",)),
             ("pvt_v2", ("PvtImageProcessor",)),
diff --git a/src/transformers/models/pixtral/__init__.py b/src/transformers/models/pixtral/__init__.py
index 128fd3ebe048..400a52a8adf2 100644
--- a/src/transformers/models/pixtral/__init__.py
+++ b/src/transformers/models/pixtral/__init__.py
@@ -13,7 +13,13 @@
 # limitations under the License.
 from typing import TYPE_CHECKING
 
-from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available
+from ...utils import (
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    is_torch_available,
+    is_torchvision_available,
+    is_vision_available,
+)
 
 
 _import_structure = {
@@ -41,6 +47,14 @@
 else:
     _import_structure["image_processing_pixtral"] = ["PixtralImageProcessor"]
 
+try:
+    if not is_torchvision_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["image_processing_pixtral_fast"] = ["PixtralImageProcessorFast"]
+
 
 if TYPE_CHECKING:
     from .configuration_pixtral import PixtralVisionConfig
@@ -65,6 +79,14 @@
     else:
         from .image_processing_pixtral import PixtralImageProcessor
 
+    try:
+        if not is_torchvision_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .image_processing_pixtral_fast import PixtralImageProcessorFast
+
 else:
     import sys
 
diff --git a/src/transformers/models/pixtral/image_processing_pixtral.py b/src/transformers/models/pixtral/image_processing_pixtral.py
index b4ec0e50c9cc..3f3978e1934f 100644
--- a/src/transformers/models/pixtral/image_processing_pixtral.py
+++ b/src/transformers/models/pixtral/image_processing_pixtral.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 """Image processor class for Pixtral."""
 
+import math
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union
 
 import numpy as np
@@ -179,7 +180,7 @@ def _num_image_tokens(image_size: Tuple[int, int], patch_size: Tuple[int, int])
 
 
 def get_resize_output_image_size(
-    input_image: np.ndarray,
+    input_image: ImageInput,
     size: Union[int, Tuple[int, int], List[int], Tuple[int]],
     patch_size: Union[int, Tuple[int, int], List[int], Tuple[int]],
     input_data_format: Optional[Union[str, ChannelDimension]] = None,
@@ -189,7 +190,7 @@ def get_resize_output_image_size(
     size.
 
     Args:
-        input_image (`np.ndarray`):
+        input_image (`ImageInput`):
             The image to resize.
         size (`int` or `Tuple[int, int]`):
             Max image size an input image can be. Must be a dictionary with the key "longest_edge".
@@ -210,8 +211,8 @@ def get_resize_output_image_size(
 
     if ratio > 1:
         # Orgiginal implementation uses `round` which utilises bankers rounding, which can lead to surprising results
-        height = int(np.ceil(height / ratio))
-        width = int(np.ceil(width / ratio))
+        height = int(math.ceil(height / ratio))
+        width = int(math.ceil(width / ratio))
 
     num_height_tokens, num_width_tokens = _num_image_tokens((height, width), (patch_height, patch_width))
     return num_height_tokens * patch_height, num_width_tokens * patch_width
diff --git a/src/transformers/models/pixtral/image_processing_pixtral_fast.py b/src/transformers/models/pixtral/image_processing_pixtral_fast.py
new file mode 100644
index 000000000000..82fbf3b2c094
--- /dev/null
+++ b/src/transformers/models/pixtral/image_processing_pixtral_fast.py
@@ -0,0 +1,349 @@
+# coding=utf-8
+# Copyright 2024 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.
+"""Image processor class for Pixtral."""
+
+from typing import Dict, List, Optional, Union
+
+from ...image_processing_utils import get_size_dict
+from ...image_processing_utils_fast import BaseImageProcessorFast
+from ...image_utils import (
+    ChannelDimension,
+    ImageInput,
+    ImageType,
+    PILImageResampling,
+    get_image_size,
+    get_image_type,
+    infer_channel_dimension_format,
+    validate_fast_preprocess_arguments,
+    validate_kwargs,
+)
+from ...utils import (
+    TensorType,
+    is_torch_available,
+    is_torchvision_available,
+    is_torchvision_v2_available,
+    is_vision_available,
+    logging,
+)
+from .image_processing_pixtral import (
+    BatchMixFeature,
+    convert_to_rgb,
+    get_resize_output_image_size,
+    make_list_of_images,
+)
+
+
+logger = logging.get_logger(__name__)
+
+if is_torch_available():
+    import torch
+
+if is_torchvision_available():
+    if is_vision_available():
+        from ...image_utils import pil_torch_interpolation_mapping
+
+    if is_torchvision_v2_available():
+        from torchvision.transforms.v2 import functional as F
+    else:
+        from torchvision.transforms import functional as F
+
+
+class PixtralImageProcessorFast(BaseImageProcessorFast):
+    r"""
+    Constructs a fast Pixtral image processor that leverages torchvision.
+
+    Args:
+        do_resize (`bool`, *optional*, defaults to `True`):
+            Whether to resize the image's (height, width) dimensions to the specified `size`. Can be overridden by
+            `do_resize` in the `preprocess` method.
+        size (`Dict[str, int]` *optional*, defaults to `{"longest_edge": 1024}`):
+            Size of the maximum dimension of either the height or width dimension of the image. Used to control how
+            images are resized. If either the height or width are greater than `size["longest_edge"]` then both the height and width are rescaled by `height / ratio`, `width /ratio` where `ratio = max(height / longest_edge, width / longest_edge)`
+        patch_size (`Dict[str, int]` *optional*, defaults to `{"height": 16, "width": 16}`):
+            Size of the patches in the model, used to calculate the output image size. Can be overridden by `patch_size` in the `preprocess` method.
+        resample (`PILImageResampling`, *optional*, defaults to `Resampling.BICUBIC`):
+            Resampling filter to use if resizing the image. Can be overridden by `resample` in the `preprocess` method.
+        do_rescale (`bool`, *optional*, defaults to `True`):
+            Whether to rescale the image by the specified scale `rescale_factor`. Can be overridden by `do_rescale` in
+            the `preprocess` method.
+        rescale_factor (`int` or `float`, *optional*, defaults to `1/255`):
+            Scale factor to use if rescaling the image. Can be overridden by `rescale_factor` in the `preprocess`
+            method.
+        do_normalize (`bool`, *optional*, defaults to `True`):
+            Whether to normalize the image. Can be overridden by `do_normalize` in the `preprocess` method.
+        image_mean (`float` or `List[float]`, *optional*, defaults to `[0.48145466, 0.4578275, 0.40821073]`):
+            Mean to use if normalizing the image. This is a float or list of floats the length of the number of
+            channels in the image. Can be overridden by the `image_mean` parameter in the `preprocess` method.
+        image_std (`float` or `List[float]`, *optional*, defaults to `[0.26862954, 0.26130258, 0.27577711]`):
+            Standard deviation to use if normalizing the image. This is a float or list of floats the length of the
+            number of channels in the image. Can be overridden by the `image_std` parameter in the `preprocess` method.
+            Can be overridden by the `image_std` parameter in the `preprocess` method.
+        do_convert_rgb (`bool`, *optional*, defaults to `True`):
+            Whether to convert the image to RGB.
+    """
+
+    model_input_names = ["pixel_values"]
+
+    def __init__(
+        self,
+        do_resize: bool = True,
+        size: Dict[str, int] = None,
+        patch_size: Dict[str, int] = None,
+        resample: Union[PILImageResampling, "F.InterpolationMode"] = PILImageResampling.BICUBIC,
+        do_rescale: bool = True,
+        rescale_factor: Union[int, float] = 1 / 255,
+        do_normalize: bool = True,
+        image_mean: Optional[Union[float, List[float]]] = None,
+        image_std: Optional[Union[float, List[float]]] = None,
+        do_convert_rgb: bool = True,
+        **kwargs,
+    ) -> None:
+        super().__init__(**kwargs)
+        size = size if size is not None else {"longest_edge": 1024}
+        patch_size = patch_size if patch_size is not None else {"height": 16, "width": 16}
+        patch_size = get_size_dict(patch_size, default_to_square=True)
+
+        self.do_resize = do_resize
+        self.size = size
+        self.patch_size = patch_size
+        self.resample = resample
+        self.do_rescale = do_rescale
+        self.rescale_factor = rescale_factor
+        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]
+        self.do_convert_rgb = do_convert_rgb
+        self._valid_processor_keys = [
+            "images",
+            "do_resize",
+            "size",
+            "patch_size",
+            "resample",
+            "do_rescale",
+            "rescale_factor",
+            "do_normalize",
+            "image_mean",
+            "image_std",
+            "do_convert_rgb",
+            "return_tensors",
+            "data_format",
+            "input_data_format",
+        ]
+
+    def resize(
+        self,
+        image: torch.Tensor,
+        size: Dict[str, int],
+        patch_size: Dict[str, int],
+        interpolation: "F.InterpolationMode" = None,
+        **kwargs,
+    ) -> torch.Tensor:
+        """
+        Resize an image. The shortest edge of the image is resized to size["shortest_edge"], with the longest edge
+        resized to keep the input aspect ratio.
+
+        Args:
+            image (`torch.Tensor`):
+                Image to resize.
+            size (`Dict[str, int]`):
+                Dict containing the longest possible edge of the image.
+            patch_size (`Dict[str, int]`):
+                Patch size used to calculate the size of the output image.
+            interpolation (`InterpolationMode`, *optional*, defaults to `InterpolationMode.BILINEAR`):
+                Resampling filter to use when resiizing the image.
+        """
+        interpolation = interpolation if interpolation is not None else F.InterpolationMode.BILINEAR
+        if "longest_edge" in size:
+            size = (size["longest_edge"], size["longest_edge"])
+        elif "height" in size and "width" in size:
+            size = (size["height"], size["width"])
+        else:
+            raise ValueError("size must contain either 'longest_edge' or 'height' and 'width'.")
+
+        if "height" in patch_size and "width" in patch_size:
+            patch_size = (patch_size["height"], patch_size["width"])
+        else:
+            raise ValueError("patch_size must contain either 'shortest_edge' or 'height' and 'width'.")
+
+        output_size = get_resize_output_image_size(
+            image,
+            size=size,
+            patch_size=patch_size,
+        )
+        return F.resize(
+            image,
+            size=output_size,
+            interpolation=interpolation,
+            **kwargs,
+        )
+
+    def preprocess(
+        self,
+        images: ImageInput,
+        do_resize: bool = None,
+        size: Dict[str, int] = None,
+        patch_size: Dict[str, int] = None,
+        resample: Optional[Union[PILImageResampling, "F.InterpolationMode"]] = None,
+        do_rescale: bool = None,
+        rescale_factor: float = None,
+        do_normalize: bool = None,
+        image_mean: Optional[Union[float, List[float]]] = None,
+        image_std: Optional[Union[float, List[float]]] = None,
+        do_convert_rgb: bool = None,
+        return_tensors: Optional[Union[str, TensorType]] = None,
+        data_format: Optional[ChannelDimension] = ChannelDimension.FIRST,
+        input_data_format: Optional[Union[str, ChannelDimension]] = None,
+        **kwargs,
+    ) -> BatchMixFeature:
+        """
+        Preprocess an image or batch of images.
+
+        Args:
+            images (`ImageInput`):
+                Image to preprocess. Expects a single or batch of images with pixel values ranging from 0 to 255. If
+                passing in images with pixel values between 0 and 1, set `do_rescale=False`.
+            do_resize (`bool`, *optional*, defaults to `self.do_resize`):
+                Whether to resize the image.
+            size (`Dict[str, int]`, *optional*, defaults to `self.size`):
+                Describes the maximum input dimensions to the model.
+            patch_size (`Dict[str, int]`, *optional*, defaults to `self.patch_size`):
+                Patch size in the model. Used to calculate the image after resizing.
+            resample (`PILImageResampling` or `InterpolationMode`, *optional*, defaults to self.resample):
+                Resampling filter to use if resizing the image. This can be one of the enum `PILImageResampling`. Only
+                has an effect if `do_resize` is set to `True`.
+            do_rescale (`bool`, *optional*, defaults to `self.do_rescale`):
+                Whether to rescale the image.
+            rescale_factor (`float`, *optional*, defaults to `self.rescale_factor`):
+                Rescale factor to rescale the image by if `do_rescale` is set to `True`.
+            do_normalize (`bool`, *optional*, defaults to `self.do_normalize`):
+                Whether to normalize the image.
+            image_mean (`float` or `List[float]`, *optional*, defaults to `self.image_mean`):
+                Image mean to use for normalization. Only has an effect if `do_normalize` is set to `True`.
+            image_std (`float` or `List[float]`, *optional*, defaults to `self.image_std`):
+                Image standard deviation to use for normalization. Only has an effect if `do_normalize` is set to
+                `True`.
+            do_convert_rgb (`bool`, *optional*, defaults to `self.do_convert_rgb`):
+                Whether to convert the image to RGB.
+            return_tensors (`str` or `TensorType`, *optional*):
+                The type of tensors to return. Can be one of:
+                - Unset: Return a list of `np.ndarray`.
+                - `TensorType.TENSORFLOW` or `'tf'`: Return a batch of type `tf.Tensor`.
+                - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`.
+                - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.ndarray`.
+                - `TensorType.JAX` or `'jax'`: Return a batch of type `jax.numpy.ndarray`.
+            data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`):
+                The channel dimension format for the output image. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+                - Unset: Use the channel dimension format of the input image.
+            input_data_format (`ChannelDimension` or `str`, *optional*):
+                The channel dimension format for the input image. If unset, the channel dimension format is inferred
+                from the input image. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+                - `"none"` or `ChannelDimension.NONE`: image in (height, width) format.
+        """
+        patch_size = patch_size if patch_size is not None else self.patch_size
+        patch_size = get_size_dict(patch_size, default_to_square=True)
+
+        do_resize = do_resize if do_resize is not None else self.do_resize
+        size = size if size is not None else self.size
+        resample = resample if resample is not None else self.resample
+        do_rescale = do_rescale if do_rescale is not None else self.do_rescale
+        rescale_factor = rescale_factor if rescale_factor is not None else self.rescale_factor
+        do_normalize = do_normalize if do_normalize is not None else self.do_normalize
+        image_mean = image_mean if image_mean is not None else self.image_mean
+        image_std = image_std if image_std is not None else self.image_std
+        do_convert_rgb = do_convert_rgb if do_convert_rgb is not None else self.do_convert_rgb
+        device = kwargs.pop("device", None)
+
+        validate_kwargs(captured_kwargs=kwargs.keys(), valid_processor_keys=self._valid_processor_keys)
+
+        images_list = make_list_of_images(images)
+        image_type = get_image_type(images_list[0][0])
+
+        if image_type not in [ImageType.PIL, ImageType.TORCH, ImageType.NUMPY]:
+            raise ValueError(f"Unsupported input image type {image_type}")
+
+        validate_fast_preprocess_arguments(
+            do_rescale=do_rescale,
+            rescale_factor=rescale_factor,
+            do_normalize=do_normalize,
+            image_mean=image_mean,
+            image_std=image_std,
+            do_resize=do_resize,
+            size=size,
+            resample=resample,
+            return_tensors=return_tensors,
+            data_format=data_format,
+        )
+
+        if do_convert_rgb:
+            images_list = [[convert_to_rgb(image) for image in images] for images in images_list]
+
+        if image_type == ImageType.PIL:
+            images_list = [[F.pil_to_tensor(image) for image in images] for images in images_list]
+        elif image_type == ImageType.NUMPY:
+            # not using F.to_tensor as it doesn't handle (C, H, W) numpy arrays
+            images_list = [[torch.from_numpy(image).contiguous() for image in images] for images in images_list]
+
+        if device is not None:
+            images_list = [[image.to(device) for image in images] for images in images_list]
+
+        # We assume that all images have the same channel dimension format.
+        if input_data_format is None:
+            input_data_format = infer_channel_dimension_format(images_list[0][0])
+        if input_data_format == ChannelDimension.LAST:
+            images_list = [[image.permute(2, 0, 1).contiguous() for image in images] for images in images_list]
+            input_data_format = ChannelDimension.FIRST
+
+        if do_rescale and do_normalize:
+            # fused rescale and normalize
+            new_mean = torch.tensor(image_mean, device=images_list[0][0].device) * (1.0 / rescale_factor)
+            new_std = torch.tensor(image_std, device=images_list[0][0].device) * (1.0 / rescale_factor)
+
+        batch_images = []
+        batch_image_sizes = []
+        for sample_images in images_list:
+            images = []
+            image_sizes = []
+            for image in sample_images:
+                if do_resize:
+                    interpolation = (
+                        pil_torch_interpolation_mapping[resample]
+                        if isinstance(resample, (PILImageResampling, int))
+                        else resample
+                    )
+                    image = self.resize(
+                        image=image,
+                        size=size,
+                        patch_size=patch_size,
+                        interpolation=interpolation,
+                    )
+
+                if do_rescale and do_normalize:
+                    # fused rescale and normalize
+                    image = F.normalize(image.to(dtype=torch.float32), new_mean, new_std)
+                elif do_rescale:
+                    image = image * rescale_factor
+                elif do_normalize:
+                    image = F.normalize(image, image_mean, image_std)
+
+                images.append(image)
+                image_sizes.append(get_image_size(image, input_data_format))
+            batch_images.append(images)
+            batch_image_sizes.append(image_sizes)
+
+        return BatchMixFeature(data={"pixel_values": batch_images, "image_sizes": batch_image_sizes}, tensor_type=None)
diff --git a/src/transformers/utils/dummy_torchvision_objects.py b/src/transformers/utils/dummy_torchvision_objects.py
index 343eda601356..747f75386490 100644
--- a/src/transformers/utils/dummy_torchvision_objects.py
+++ b/src/transformers/utils/dummy_torchvision_objects.py
@@ -23,6 +23,13 @@ def __init__(self, *args, **kwargs):
         requires_backends(self, ["torchvision"])
 
 
+class PixtralImageProcessorFast(metaclass=DummyObject):
+    _backends = ["torchvision"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torchvision"])
+
+
 class RTDetrImageProcessorFast(metaclass=DummyObject):
     _backends = ["torchvision"]
 
diff --git a/tests/models/pixtral/test_image_processing_pixtral.py b/tests/models/pixtral/test_image_processing_pixtral.py
index 3994201c065c..8b49b5aa60b9 100644
--- a/tests/models/pixtral/test_image_processing_pixtral.py
+++ b/tests/models/pixtral/test_image_processing_pixtral.py
@@ -14,12 +14,14 @@
 # limitations under the License.
 
 import random
+import time
 import unittest
 
 import numpy as np
+import requests
 
 from transformers.testing_utils import require_torch, require_vision
-from transformers.utils import is_torch_available, is_vision_available
+from transformers.utils import is_torch_available, is_torchvision_available, is_vision_available
 
 from ...test_image_processing_common import ImageProcessingTestMixin, prepare_image_inputs
 
@@ -32,6 +34,9 @@
 
     from transformers import PixtralImageProcessor
 
+    if is_torchvision_available():
+        from transformers import PixtralImageProcessorFast
+
 
 class PixtralImageProcessingTester(unittest.TestCase):
     def __init__(
@@ -51,6 +56,7 @@ def __init__(
         image_std=[0.26862954, 0.26130258, 0.27577711],
         do_convert_rgb=True,
     ):
+        super().__init__()
         size = size if size is not None else {"longest_edge": 24}
         patch_size = patch_size if patch_size is not None else {"height": 8, "width": 8}
         self.parent = parent
@@ -128,6 +134,7 @@ def prepare_image_inputs(self, equal_resolution=False, numpify=False, torchify=F
 @require_vision
 class PixtralImageProcessingTest(ImageProcessingTestMixin, unittest.TestCase):
     image_processing_class = PixtralImageProcessor if is_vision_available() else None
+    fast_image_processing_class = PixtralImageProcessorFast if is_torchvision_available() else None
 
     def setUp(self):
         super().setUp()
@@ -138,79 +145,133 @@ def image_processor_dict(self):
         return self.image_processor_tester.prepare_image_processor_dict()
 
     def test_image_processor_properties(self):
-        image_processing = self.image_processing_class(**self.image_processor_dict)
-        self.assertTrue(hasattr(image_processing, "do_resize"))
-        self.assertTrue(hasattr(image_processing, "size"))
-        self.assertTrue(hasattr(image_processing, "patch_size"))
-        self.assertTrue(hasattr(image_processing, "do_rescale"))
-        self.assertTrue(hasattr(image_processing, "rescale_factor"))
-        self.assertTrue(hasattr(image_processing, "do_normalize"))
-        self.assertTrue(hasattr(image_processing, "image_mean"))
-        self.assertTrue(hasattr(image_processing, "image_std"))
-        self.assertTrue(hasattr(image_processing, "do_convert_rgb"))
+        for image_processing_class in self.image_processor_list:
+            image_processing = image_processing_class(**self.image_processor_dict)
+            self.assertTrue(hasattr(image_processing, "do_resize"))
+            self.assertTrue(hasattr(image_processing, "size"))
+            self.assertTrue(hasattr(image_processing, "patch_size"))
+            self.assertTrue(hasattr(image_processing, "do_rescale"))
+            self.assertTrue(hasattr(image_processing, "rescale_factor"))
+            self.assertTrue(hasattr(image_processing, "do_normalize"))
+            self.assertTrue(hasattr(image_processing, "image_mean"))
+            self.assertTrue(hasattr(image_processing, "image_std"))
+            self.assertTrue(hasattr(image_processing, "do_convert_rgb"))
 
     def test_call_pil(self):
-        # Initialize image_processing
-        image_processing = self.image_processing_class(**self.image_processor_dict)
-        # create random PIL images
-        image_inputs_list = self.image_processor_tester.prepare_image_inputs()
-        for image_inputs in image_inputs_list:
-            for image in image_inputs:
-                self.assertIsInstance(image, Image.Image)
-
-        # Test not batched input
-        encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
-        expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image_inputs_list[0][0])
-        self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
-
-        # Test batched
-        batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
-        for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
-            for encoded_image, image in zip(encoded_images, images):
-                expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
-                self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
+        for image_processing_class in self.image_processor_list:
+            # Initialize image_processing
+            image_processing = image_processing_class(**self.image_processor_dict)
+            # create random PIL images
+            image_inputs_list = self.image_processor_tester.prepare_image_inputs()
+            for image_inputs in image_inputs_list:
+                for image in image_inputs:
+                    self.assertIsInstance(image, Image.Image)
+
+            # Test not batched input
+            encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
+            expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(
+                image_inputs_list[0][0]
+            )
+            self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
+
+            # Test batched
+            batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
+            for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
+                for encoded_image, image in zip(encoded_images, images):
+                    expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
+                    self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
 
     def test_call_numpy(self):
-        # Initialize image_processing
-        image_processing = self.image_processing_class(**self.image_processor_dict)
-        # create random numpy tensors
-        image_inputs_list = self.image_processor_tester.prepare_image_inputs(numpify=True)
-        for image_inputs in image_inputs_list:
-            for image in image_inputs:
-                self.assertIsInstance(image, np.ndarray)
-
-        # Test not batched input
-        encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
-        expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image_inputs_list[0][0])
-        self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
-
-        # Test batched
-        batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
-        for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
-            for encoded_image, image in zip(encoded_images, images):
-                expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
-                self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
+        for image_processing_class in self.image_processor_list:
+            # Initialize image_processing
+            image_processing = image_processing_class(**self.image_processor_dict)
+            # create random numpy tensors
+            image_inputs_list = self.image_processor_tester.prepare_image_inputs(numpify=True)
+            for image_inputs in image_inputs_list:
+                for image in image_inputs:
+                    self.assertIsInstance(image, np.ndarray)
+
+            # Test not batched input
+            encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
+            expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(
+                image_inputs_list[0][0]
+            )
+            self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
+
+            # Test batched
+            batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
+            for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
+                for encoded_image, image in zip(encoded_images, images):
+                    expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
+                    self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
 
     def test_call_pytorch(self):
-        # Initialize image_processing
-        image_processing = self.image_processing_class(**self.image_processor_dict)
-        # create random PyTorch tensors
+        for image_processing_class in self.image_processor_list:
+            # Initialize image_processing
+            image_processing = image_processing_class(**self.image_processor_dict)
+            # create random PyTorch tensors
+            image_inputs_list = self.image_processor_tester.prepare_image_inputs(torchify=True)
+            for image_inputs in image_inputs_list:
+                for image in image_inputs:
+                    self.assertIsInstance(image, torch.Tensor)
+
+            # Test not batched input
+            encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
+            expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(
+                image_inputs_list[0][0]
+            )
+            self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
+
+            # Test batched
+            batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
+            for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
+                for encoded_image, image in zip(encoded_images, images):
+                    expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
+                    self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
+
+    @require_vision
+    @require_torch
+    def test_fast_is_faster_than_slow(self):
+        if not self.test_slow_image_processor or not self.test_fast_image_processor:
+            self.skipTest(reason="Skipping speed test")
+
+        if self.image_processing_class is None or self.fast_image_processing_class is None:
+            self.skipTest(reason="Skipping speed test as one of the image processors is not defined")
+
+        def measure_time(image_processor, image):
+            start = time.time()
+            _ = image_processor(image, return_tensors="pt")
+            return time.time() - start
+
         image_inputs_list = self.image_processor_tester.prepare_image_inputs(torchify=True)
-        for image_inputs in image_inputs_list:
-            for image in image_inputs:
-                self.assertIsInstance(image, torch.Tensor)
-
-        # Test not batched input
-        encoded_images = image_processing(image_inputs_list[0][0], return_tensors="pt").pixel_values
-        expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image_inputs_list[0][0])
-        self.assertEqual(tuple(encoded_images[0][0].shape), expected_output_image_shape)
-
-        # Test batched
-        batch_encoded_images = image_processing(image_inputs_list, return_tensors="pt").pixel_values
-        for encoded_images, images in zip(batch_encoded_images, image_inputs_list):
-            for encoded_image, image in zip(encoded_images, images):
-                expected_output_image_shape = self.image_processor_tester.expected_output_image_shape(image)
-                self.assertEqual(tuple(encoded_image.shape), expected_output_image_shape)
+        image_processor_slow = self.image_processing_class(**self.image_processor_dict)
+        image_processor_fast = self.fast_image_processing_class(**self.image_processor_dict)
+
+        fast_time = measure_time(image_processor_fast, image_inputs_list)
+        slow_time = measure_time(image_processor_slow, image_inputs_list)
+
+        self.assertLessEqual(fast_time, slow_time)
+
+    @require_vision
+    @require_torch
+    def test_slow_fast_equivalence(self):
+        dummy_image = Image.open(
+            requests.get("http://images.cocodataset.org/val2017/000000039769.jpg", stream=True).raw
+        )
+
+        if not self.test_slow_image_processor or not self.test_fast_image_processor:
+            self.skipTest(reason="Skipping slow/fast equivalence test")
+
+        if self.image_processing_class is None or self.fast_image_processing_class is None:
+            self.skipTest(reason="Skipping slow/fast equivalence test as one of the image processors is not defined")
+
+        image_processor_slow = self.image_processing_class(**self.image_processor_dict)
+        image_processor_fast = self.fast_image_processing_class(**self.image_processor_dict)
+
+        encoding_slow = image_processor_slow(dummy_image, return_tensors="pt")
+        encoding_fast = image_processor_fast(dummy_image, return_tensors="pt")
+
+        self.assertTrue(torch.allclose(encoding_slow.pixel_values[0][0], encoding_fast.pixel_values[0][0], atol=1e-2))
 
     @unittest.skip(reason="PixtralImageProcessor doesn't treat 4 channel PIL and numpy consistently yet")  # FIXME Amy
     def test_call_numpy_4_channels(self):