# MobileNet V2 [MobileNet V2](https://huggingface.co/papers/1801.04381) improves performance on mobile devices with a more efficient architecture. It uses inverted residual blocks and linear bottlenecks to start with a smaller representation of the data, expands it for processing, and shrinks it again to reduce the number of computations. The model also removes non-linearities to maintain accuracy despite its simplified design. Like [MobileNet V1](./mobilenet_v1), it uses depthwise separable convolutions for efficiency. You can all the original MobileNet checkpoints under the [Google](https://huggingface.co/google?search_models=mobilenet) organization. > [!TIP] > Click on the MobileNet V2 models in the right sidebar for more examples of how to apply MobileNet to different vision tasks. The examples below demonstrate how to classify an image with [Pipeline](/docs/transformers/v5.0.0rc2/en/main_classes/pipelines#transformers.Pipeline) or the [AutoModel](/docs/transformers/v5.0.0rc2/en/model_doc/auto#transformers.AutoModel) class. ```python import torch from transformers import pipeline pipeline = pipeline( task="image-classification", model="google/mobilenet_v2_1.4_224", dtype=torch.float16, device=0 ) pipeline("https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg") ``` ```python import torch import requests from PIL import Image from transformers import AutoModelForImageClassification, AutoImageProcessor image_processor = AutoImageProcessor.from_pretrained( "google/mobilenet_v2_1.4_224", ) model = AutoModelForImageClassification.from_pretrained( "google/mobilenet_v2_1.4_224", ) url = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg" image = Image.open(requests.get(url, stream=True).raw) inputs = image_processor(image, return_tensors="pt") with torch.no_grad(): logits = model(**inputs).logits predicted_class_id = logits.argmax(dim=-1).item() class_labels = model.config.id2label predicted_class_label = class_labels[predicted_class_id] print(f"The predicted class label is: {predicted_class_label}") ``` ## Notes - Classification checkpoint names follow the pattern `mobilenet_v2_{depth_multiplier}_{resolution}`, like `mobilenet_v2_1.4_224`. `1.4` is the depth multiplier and `224` is the image resolution. Segmentation checkpoint names follow the pattern `deeplabv3_mobilenet_v2_{depth_multiplier}_{resolution}`. - While trained on images of a specific sizes, the model architecture works with images of different sizes (minimum 32x32). The [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor) handles the necessary preprocessing. - MobileNet is pretrained on [ImageNet-1k](https://huggingface.co/datasets/ILSVRC/imagenet-1k), a dataset with 1000 classes. However, the model actually predicts 1001 classes. The additional class is an extra "background" class (index 0). - The segmentation models use a [DeepLabV3+](https://huggingface.co/papers/1802.02611) head which is often pretrained on datasets like [PASCAL VOC](https://huggingface.co/datasets/merve/pascal-voc). - The original TensorFlow checkpoints determines the padding amount at inference because it depends on the input image size. To use the native PyTorch padding behavior, set `tf_padding=False` in [MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config). ```python from transformers import MobileNetV2Config config = MobileNetV2Config.from_pretrained("google/mobilenet_v2_1.4_224", tf_padding=True) ``` - The Transformers implementation does not support the following features. - Uses global average pooling instead of the optional 7x7 average pooling with stride 2. For larger inputs, this gives a pooled output that is larger than a 1x1 pixel. - `output_hidden_states=True` returns *all* intermediate hidden states. It is not possible to extract the output from specific layers for other downstream purposes. - Does not include the quantized models from the original checkpoints because they include "FakeQuantization" operations to unquantize the weights. - For segmentation models, the final convolution layer of the backbone is computed even though the DeepLabV3+ head doesn't use it. ## MobileNetV2Config[[transformers.MobileNetV2Config]] #### transformers.MobileNetV2Config[[transformers.MobileNetV2Config]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/configuration_mobilenet_v2.py#L24) This is the configuration class to store the configuration of a [MobileNetV2Model](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Model). It is used to instantiate a MobileNetV2 model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the MobileNetV2 [google/mobilenet_v2_1.0_224](https://huggingface.co/google/mobilenet_v2_1.0_224) architecture. Configuration objects inherit from [PreTrainedConfig](/docs/transformers/v5.0.0rc2/en/main_classes/configuration#transformers.PreTrainedConfig) and can be used to control the model outputs. Read the documentation from [PreTrainedConfig](/docs/transformers/v5.0.0rc2/en/main_classes/configuration#transformers.PreTrainedConfig) for more information. Example: ```python >>> from transformers import MobileNetV2Config, MobileNetV2Model >>> # Initializing a "mobilenet_v2_1.0_224" style configuration >>> configuration = MobileNetV2Config() >>> # Initializing a model from the "mobilenet_v2_1.0_224" style configuration >>> model = MobileNetV2Model(configuration) >>> # Accessing the model configuration >>> configuration = model.config ``` **Parameters:** num_channels (`int`, *optional*, defaults to 3) : The number of input channels. image_size (`int`, *optional*, defaults to 224) : The size (resolution) of each image. depth_multiplier (`float`, *optional*, defaults to 1.0) : Shrinks or expands the number of channels in each layer. Default is 1.0, which starts the network with 32 channels. This is sometimes also called "alpha" or "width multiplier". depth_divisible_by (`int`, *optional*, defaults to 8) : The number of channels in each layer will always be a multiple of this number. min_depth (`int`, *optional*, defaults to 8) : All layers will have at least this many channels. expand_ratio (`float`, *optional*, defaults to 6.0) : The number of output channels of the first layer in each block is input channels times expansion ratio. output_stride (`int`, *optional*, defaults to 32) : The ratio between the spatial resolution of the input and output feature maps. By default the model reduces the input dimensions by a factor of 32. If `output_stride` is 8 or 16, the model uses dilated convolutions on the depthwise layers instead of regular convolutions, so that the feature maps never become more than 8x or 16x smaller than the input image. first_layer_is_expansion (`bool`, *optional*, defaults to `True`) : True if the very first convolution layer is also the expansion layer for the first expansion block. finegrained_output (`bool`, *optional*, defaults to `True`) : If true, the number of output channels in the final convolution layer will stay large (1280) even if `depth_multiplier` is less than 1. hidden_act (`str` or `function`, *optional*, defaults to `"relu6"`) : The non-linear activation function (function or string) in the Transformer encoder and convolution layers. tf_padding (`bool`, *optional*, defaults to `True`) : Whether to use TensorFlow padding rules on the convolution layers. classifier_dropout_prob (`float`, *optional*, defaults to 0.8) : The dropout ratio for attached classifiers. initializer_range (`float`, *optional*, defaults to 0.02) : The standard deviation of the truncated_normal_initializer for initializing all weight matrices. layer_norm_eps (`float`, *optional*, defaults to 0.001) : The epsilon used by the layer normalization layers. semantic_loss_ignore_index (`int`, *optional*, defaults to 255) : The index that is ignored by the loss function of the semantic segmentation model. ## MobileNetV2ImageProcessor[[transformers.MobileNetV2ImageProcessor]] #### transformers.MobileNetV2ImageProcessor[[transformers.MobileNetV2ImageProcessor]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2.py#L66) Constructs a MobileNetV2 image processor. preprocesstransformers.MobileNetV2ImageProcessor.preprocesshttps://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2.py#L335[{"name": "images", "val": ": typing.Union[ForwardRef('PIL.Image.Image'), numpy.ndarray, ForwardRef('torch.Tensor'), list['PIL.Image.Image'], list[numpy.ndarray], list['torch.Tensor']]"}, {"name": "segmentation_maps", "val": ": typing.Union[ForwardRef('PIL.Image.Image'), numpy.ndarray, ForwardRef('torch.Tensor'), list['PIL.Image.Image'], list[numpy.ndarray], list['torch.Tensor'], NoneType] = None"}, {"name": "do_resize", "val": ": typing.Optional[bool] = None"}, {"name": "size", "val": ": typing.Optional[dict[str, int]] = None"}, {"name": "resample", "val": ": typing.Optional[PIL.Image.Resampling] = None"}, {"name": "do_center_crop", "val": ": typing.Optional[bool] = None"}, {"name": "crop_size", "val": ": typing.Optional[dict[str, int]] = None"}, {"name": "do_rescale", "val": ": typing.Optional[bool] = None"}, {"name": "rescale_factor", "val": ": typing.Optional[float] = None"}, {"name": "do_normalize", "val": ": typing.Optional[bool] = None"}, {"name": "image_mean", "val": ": typing.Union[float, list[float], NoneType] = None"}, {"name": "image_std", "val": ": typing.Union[float, list[float], NoneType] = None"}, {"name": "do_reduce_labels", "val": ": typing.Optional[bool] = None"}, {"name": "return_tensors", "val": ": typing.Union[str, transformers.utils.generic.TensorType, NoneType] = None"}, {"name": "data_format", "val": ": typing.Union[str, transformers.image_utils.ChannelDimension] = "}, {"name": "input_data_format", "val": ": typing.Union[str, transformers.image_utils.ChannelDimension, NoneType] = None"}]- **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`. - **segmentation_maps** (`ImageInput`, *optional*) -- Segmentation map to preprocess. - **do_resize** (`bool`, *optional*, defaults to `self.do_resize`) -- Whether to resize the image. - **size** (`dict[str, int]`, *optional*, defaults to `self.size`) -- Size of the image after resizing. Shortest edge of the image is resized to size["shortest_edge"], with the longest edge resized to keep the input aspect ratio. - **resample** (`PILImageResampling` filter, *optional*, defaults to `self.resample`) -- `PILImageResampling` filter to use if resizing the image e.g. `PILImageResampling.BILINEAR`. Only has an effect if `do_resize` is set to `True`. - **do_center_crop** (`bool`, *optional*, defaults to `self.do_center_crop`) -- Whether to center crop the image. - **crop_size** (`dict[str, int]`, *optional*, defaults to `self.crop_size`) -- Size of the center crop. Only has an effect if `do_center_crop` is set to `True`. - **do_rescale** (`bool`, *optional*, defaults to `self.do_rescale`) -- Whether to rescale the image values between [0 - 1]. - **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 if `do_normalize` is set to `True`. - **image_std** (`float` or `list[float]`, *optional*, defaults to `self.image_std`) -- Image standard deviation to use if `do_normalize` is set to `True`. - **do_reduce_labels** (`bool`, *optional*, defaults to `self.do_reduce_labels`) -- Whether or not to reduce all label values of segmentation maps by 1. Usually used for datasets where 0 is used for background, and background itself is not included in all classes of a dataset (e.g. ADE20k). The background label will be replaced by 255. - **return_tensors** (`str` or `TensorType`, *optional*) -- The type of tensors to return. Can be one of: - Unset: Return a list of `np.ndarray`. - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`. - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.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.0 Preprocess an image or batch of images. **Parameters:** 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 `{"shortest_edge" : 256}`): Size of the image after resizing. The shortest edge of the image is resized to size["shortest_edge"], with the longest edge resized to keep the input aspect ratio. Can be overridden by `size` in the `preprocess` method. resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BILINEAR`) : Resampling filter to use if resizing the image. Can be overridden by the `resample` parameter in the `preprocess` method. do_center_crop (`bool`, *optional*, defaults to `True`) : Whether to center crop the image. If the input size is smaller than `crop_size` along any edge, the image is padded with 0's and then center cropped. Can be overridden by the `do_center_crop` parameter in the `preprocess` method. crop_size (`dict[str, int]`, *optional*, defaults to `{"height" : 224, "width": 224}`): Desired output size when applying center-cropping. Only has an effect if `do_center_crop` is set to `True`. Can be overridden by the `crop_size` parameter 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 the `do_rescale` parameter 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 the `rescale_factor` parameter in the `preprocess` method. do_normalize : Whether to normalize the image. Can be overridden by the `do_normalize` parameter in the `preprocess` method. image_mean (`float` or `list[float]`, *optional*, defaults to `IMAGENET_STANDARD_MEAN`) : 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 `IMAGENET_STANDARD_STD`) : 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. do_reduce_labels (`bool`, *optional*, defaults to `False`) : Whether or not to reduce all label values of segmentation maps by 1. Usually used for datasets where 0 is used for background, and background itself is not included in all classes of a dataset (e.g. ADE20k). The background label will be replaced by 255. Can be overridden by the `do_reduce_labels` parameter in the `preprocess` method. #### post_process_semantic_segmentation[[transformers.MobileNetV2ImageProcessor.post_process_semantic_segmentation]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2.py#L486) Converts the output of [MobileNetV2ForSemanticSegmentation](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForSemanticSegmentation) into semantic segmentation maps. **Parameters:** outputs ([MobileNetV2ForSemanticSegmentation](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForSemanticSegmentation)) : Raw outputs of the model. target_sizes (`list[Tuple]` of length `batch_size`, *optional*) : List of tuples corresponding to the requested final size (height, width) of each prediction. If unset, predictions will not be resized. **Returns:** `semantic_segmentation` `list[torch.Tensor]` of length `batch_size`, where each item is a semantic segmentation map of shape (height, width) corresponding to the target_sizes entry (if `target_sizes` is specified). Each entry of each `torch.Tensor` correspond to a semantic class id. ## MobileNetV2ImageProcessorFast[[transformers.MobileNetV2ImageProcessorFast]] #### transformers.MobileNetV2ImageProcessorFast[[transformers.MobileNetV2ImageProcessorFast]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2_fast.py#L46) Constructs a fast Mobilenet V2 image processor. preprocesstransformers.MobileNetV2ImageProcessorFast.preprocesshttps://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2_fast.py#L74[{"name": "images", "val": ": typing.Union[ForwardRef('PIL.Image.Image'), numpy.ndarray, ForwardRef('torch.Tensor'), list['PIL.Image.Image'], list[numpy.ndarray], list['torch.Tensor']]"}, {"name": "segmentation_maps", "val": ": typing.Union[ForwardRef('PIL.Image.Image'), numpy.ndarray, ForwardRef('torch.Tensor'), list['PIL.Image.Image'], list[numpy.ndarray], list['torch.Tensor'], NoneType] = None"}, {"name": "**kwargs", "val": ": typing_extensions.Unpack[transformers.models.mobilenet_v2.image_processing_mobilenet_v2.MobileNetV2ImageProcessorKwargs]"}]- **images** (`Union[PIL.Image.Image, numpy.ndarray, torch.Tensor, list, list, list]`) -- 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`. - **segmentation_maps** (`ImageInput`, *optional*) -- The segmentation maps to preprocess. - **do_convert_rgb** (`bool`, *optional*) -- Whether to convert the image to RGB. - **do_resize** (`bool`, *optional*) -- Whether to resize the image. - **size** (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) -- Describes the maximum input dimensions to the model. - **crop_size** (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) -- Size of the output image after applying `center_crop`. - **resample** (`Annotated[Union[PILImageResampling, int, NoneType], None]`) -- 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*) -- Whether to rescale the image. - **rescale_factor** (`float`, *optional*) -- Rescale factor to rescale the image by if `do_rescale` is set to `True`. - **do_normalize** (`bool`, *optional*) -- Whether to normalize the image. - **image_mean** (`Union[float, list[float], tuple[float, ...], NoneType]`) -- Image mean to use for normalization. Only has an effect if `do_normalize` is set to `True`. - **image_std** (`Union[float, list[float], tuple[float, ...], NoneType]`) -- Image standard deviation to use for normalization. Only has an effect if `do_normalize` is set to `True`. - **do_pad** (`bool`, *optional*) -- Whether to pad the image. Padding is done either to the largest size in the batch or to a fixed square size per image. The exact padding strategy depends on the model. - **pad_size** (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) -- The size in `{"height": int, "width" int}` to pad the images to. Must be larger than any image size provided for preprocessing. If `pad_size` is not provided, images will be padded to the largest height and width in the batch. Applied only when `do_pad=True.` - **do_center_crop** (`bool`, *optional*) -- Whether to center crop the image. - **data_format** (`Union[~image_utils.ChannelDimension, str, NoneType]`) -- Only `ChannelDimension.FIRST` is supported. Added for compatibility with slow processors. - **input_data_format** (`Union[~image_utils.ChannelDimension, str, NoneType]`) -- 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. - **device** (`Annotated[Union[str, torch.device, NoneType], None]`) -- The device to process the images on. If unset, the device is inferred from the input images. - **return_tensors** (`Annotated[Union[str, ~utils.generic.TensorType, NoneType], None]`) -- Returns stacked tensors if set to `pt, otherwise returns a list of tensors. - **disable_grouping** (`bool`, *optional*) -- Whether to disable grouping of images by size to process them individually and not in batches. If None, will be set to True if the images are on CPU, and False otherwise. This choice is based on empirical observations, as detailed here: https://github.com/huggingface/transformers/pull/38157 - **image_seq_length** (`int`, *optional*) -- The number of image tokens to be used for each image in the input. Added for backward compatibility but this should be set as a processor attribute in future models. - **do_reduce_labels** (`bool`, *optional*, defaults to `self.do_reduce_labels`) -- Whether or not to reduce all label values of segmentation maps by 1. Usually used for datasets where 0 is used for background, and background itself is not included in all classes of a dataset (e.g. ADE20k). The background label will be replaced by 255.0``- **data** (`dict`) -- Dictionary of lists/arrays/tensors returned by the __call__ method ('pixel_values', etc.). - **tensor_type** (`Union[None, str, TensorType]`, *optional*) -- You can give a tensor_type here to convert the lists of integers in PyTorch/Numpy Tensors at initialization. **Parameters:** images (`Union[PIL.Image.Image, numpy.ndarray, torch.Tensor, list, list, list]`) : 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`. segmentation_maps (`ImageInput`, *optional*) : The segmentation maps to preprocess. do_convert_rgb (`bool`, *optional*) : Whether to convert the image to RGB. do_resize (`bool`, *optional*) : Whether to resize the image. size (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) : Describes the maximum input dimensions to the model. crop_size (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) : Size of the output image after applying `center_crop`. resample (`Annotated[Union[PILImageResampling, int, NoneType], None]`) : 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*) : Whether to rescale the image. rescale_factor (`float`, *optional*) : Rescale factor to rescale the image by if `do_rescale` is set to `True`. do_normalize (`bool`, *optional*) : Whether to normalize the image. image_mean (`Union[float, list[float], tuple[float, ...], NoneType]`) : Image mean to use for normalization. Only has an effect if `do_normalize` is set to `True`. image_std (`Union[float, list[float], tuple[float, ...], NoneType]`) : Image standard deviation to use for normalization. Only has an effect if `do_normalize` is set to `True`. do_pad (`bool`, *optional*) : Whether to pad the image. Padding is done either to the largest size in the batch or to a fixed square size per image. The exact padding strategy depends on the model. pad_size (`Annotated[Union[int, list[int], tuple[int, ...], dict[str, int], NoneType], None]`) : The size in `{"height": int, "width" int}` to pad the images to. Must be larger than any image size provided for preprocessing. If `pad_size` is not provided, images will be padded to the largest height and width in the batch. Applied only when `do_pad=True.` do_center_crop (`bool`, *optional*) : Whether to center crop the image. data_format (`Union[~image_utils.ChannelDimension, str, NoneType]`) : Only `ChannelDimension.FIRST` is supported. Added for compatibility with slow processors. input_data_format (`Union[~image_utils.ChannelDimension, str, NoneType]`) : 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. device (`Annotated[Union[str, torch.device, NoneType], None]`) : The device to process the images on. If unset, the device is inferred from the input images. return_tensors (`Annotated[Union[str, ~utils.generic.TensorType, NoneType], None]`) : Returns stacked tensors if set to `pt, otherwise returns a list of tensors. disable_grouping (`bool`, *optional*) : Whether to disable grouping of images by size to process them individually and not in batches. If None, will be set to True if the images are on CPU, and False otherwise. This choice is based on empirical observations, as detailed here: https://github.com/huggingface/transformers/pull/38157 image_seq_length (`int`, *optional*) : The number of image tokens to be used for each image in the input. Added for backward compatibility but this should be set as a processor attribute in future models. do_reduce_labels (`bool`, *optional*, defaults to `self.do_reduce_labels`) : Whether or not to reduce all label values of segmentation maps by 1. Usually used for datasets where 0 is used for background, and background itself is not included in all classes of a dataset (e.g. ADE20k). The background label will be replaced by 255. **Returns:** ```` - **data** (`dict`) -- Dictionary of lists/arrays/tensors returned by the __call__ method ('pixel_values', etc.). - **tensor_type** (`Union[None, str, TensorType]`, *optional*) -- You can give a tensor_type here to convert the lists of integers in PyTorch/Numpy Tensors at initialization. #### post_process_semantic_segmentation[[transformers.MobileNetV2ImageProcessorFast.post_process_semantic_segmentation]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/image_processing_mobilenet_v2_fast.py#L187) Converts the output of [MobileNetV2ForSemanticSegmentation](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForSemanticSegmentation) into semantic segmentation maps. **Parameters:** outputs ([MobileNetV2ForSemanticSegmentation](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForSemanticSegmentation)) : Raw outputs of the model. target_sizes (`list[Tuple]` of length `batch_size`, *optional*) : List of tuples corresponding to the requested final size (height, width) of each prediction. If unset, predictions will not be resized. **Returns:** `semantic_segmentation` `list[torch.Tensor]` of length `batch_size`, where each item is a semantic segmentation map of shape (height, width) corresponding to the target_sizes entry (if `target_sizes` is specified). Each entry of each `torch.Tensor` correspond to a semantic class id. ## MobileNetV2Model[[transformers.MobileNetV2Model]] #### transformers.MobileNetV2Model[[transformers.MobileNetV2Model]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L263) The bare Mobilenet V2 Model outputting raw hidden-states without any specific head on top. This model inherits from [PreTrainedModel](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. forwardtransformers.MobileNetV2Model.forwardhttps://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L328[{"name": "pixel_values", "val": ": typing.Optional[torch.Tensor] = None"}, {"name": "output_hidden_states", "val": ": typing.Optional[bool] = None"}, {"name": "return_dict", "val": ": typing.Optional[bool] = None"}, {"name": "**kwargs", "val": ""}]- **pixel_values** (`torch.Tensor` of shape `(batch_size, num_channels, image_size, image_size)`, *optional*) -- The tensors corresponding to the input images. Pixel values can be obtained using [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor). See `MobileNetV2ImageProcessor.__call__()` for details (`processor_class` uses [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor) for processing images). - **output_hidden_states** (`bool`, *optional*) -- Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. - **return_dict** (`bool`, *optional*) -- Whether or not to return a [ModelOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.0`transformers.modeling_outputs.BaseModelOutputWithPoolingAndNoAttention` or `tuple(torch.FloatTensor)`A `transformers.modeling_outputs.BaseModelOutputWithPoolingAndNoAttention` or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **last_hidden_state** (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`) -- Sequence of hidden-states at the output of the last layer of the model. - **pooler_output** (`torch.FloatTensor` of shape `(batch_size, hidden_size)`) -- Last layer hidden-state after a pooling operation on the spatial dimensions. - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, num_channels, height, width)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. The [MobileNetV2Model](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Model) forward method, overrides the `__call__` special method. Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them. Example: ```python ``` **Parameters:** config ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) : Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from_pretrained()](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights. add_pooling_layer (`bool`, *optional*, defaults to `True`) : Whether to add a pooling layer **Returns:** ``transformers.modeling_outputs.BaseModelOutputWithPoolingAndNoAttention` or `tuple(torch.FloatTensor)`` A `transformers.modeling_outputs.BaseModelOutputWithPoolingAndNoAttention` or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **last_hidden_state** (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`) -- Sequence of hidden-states at the output of the last layer of the model. - **pooler_output** (`torch.FloatTensor` of shape `(batch_size, hidden_size)`) -- Last layer hidden-state after a pooling operation on the spatial dimensions. - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, num_channels, height, width)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. ## MobileNetV2ForImageClassification[[transformers.MobileNetV2ForImageClassification]] #### transformers.MobileNetV2ForImageClassification[[transformers.MobileNetV2ForImageClassification]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L377) MobileNetV2 model with an image classification head on top (a linear layer on top of the pooled features), e.g. for ImageNet. This model inherits from [PreTrainedModel](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. forwardtransformers.MobileNetV2ForImageClassification.forwardhttps://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L393[{"name": "pixel_values", "val": ": typing.Optional[torch.Tensor] = None"}, {"name": "output_hidden_states", "val": ": typing.Optional[bool] = None"}, {"name": "labels", "val": ": typing.Optional[torch.Tensor] = None"}, {"name": "return_dict", "val": ": typing.Optional[bool] = None"}, {"name": "**kwargs", "val": ""}]- **pixel_values** (`torch.Tensor` of shape `(batch_size, num_channels, image_size, image_size)`, *optional*) -- The tensors corresponding to the input images. Pixel values can be obtained using [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor). See `MobileNetV2ImageProcessor.__call__()` for details (`processor_class` uses [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor) for processing images). - **output_hidden_states** (`bool`, *optional*) -- Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. - **labels** (`torch.LongTensor` of shape `(batch_size,)`, *optional*) -- Labels for computing the image classification/regression loss. Indices should be in `[0, ..., config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss). If `config.num_labels > 1` a classification loss is computed (Cross-Entropy). - **return_dict** (`bool`, *optional*) -- Whether or not to return a [ModelOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.0[transformers.modeling_outputs.ImageClassifierOutputWithNoAttention](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.ImageClassifierOutputWithNoAttention) or `tuple(torch.FloatTensor)`A [transformers.modeling_outputs.ImageClassifierOutputWithNoAttention](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.ImageClassifierOutputWithNoAttention) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **loss** (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided) -- Classification (or regression if config.num_labels==1) loss. - **logits** (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`) -- Classification (or regression if config.num_labels==1) scores (before SoftMax). - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each stage) of shape `(batch_size, num_channels, height, width)`. Hidden-states (also called feature maps) of the model at the output of each stage. The [MobileNetV2ForImageClassification](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForImageClassification) forward method, overrides the `__call__` special method. Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them. Example: ```python >>> from transformers import AutoImageProcessor, MobileNetV2ForImageClassification >>> import torch >>> from datasets import load_dataset >>> dataset = load_dataset("huggingface/cats-image") >>> image = dataset["test"]["image"][0] >>> image_processor = AutoImageProcessor.from_pretrained("google/mobilenet_v2_1.0_224") >>> model = MobileNetV2ForImageClassification.from_pretrained("google/mobilenet_v2_1.0_224") >>> inputs = image_processor(image, return_tensors="pt") >>> with torch.no_grad(): ... logits = model(**inputs).logits >>> # model predicts one of the 1000 ImageNet classes >>> predicted_label = logits.argmax(-1).item() >>> print(model.config.id2label[predicted_label]) ... ``` **Parameters:** config ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) : Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from_pretrained()](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights. **Returns:** `[transformers.modeling_outputs.ImageClassifierOutputWithNoAttention](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.ImageClassifierOutputWithNoAttention) or `tuple(torch.FloatTensor)`` A [transformers.modeling_outputs.ImageClassifierOutputWithNoAttention](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.ImageClassifierOutputWithNoAttention) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **loss** (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided) -- Classification (or regression if config.num_labels==1) loss. - **logits** (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`) -- Classification (or regression if config.num_labels==1) scores (before SoftMax). - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each stage) of shape `(batch_size, num_channels, height, width)`. Hidden-states (also called feature maps) of the model at the output of each stage. ## MobileNetV2ForSemanticSegmentation[[transformers.MobileNetV2ForSemanticSegmentation]] #### transformers.MobileNetV2ForSemanticSegmentation[[transformers.MobileNetV2ForSemanticSegmentation]] [Source](https://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L511) MobileNetV2 model with a semantic segmentation head on top, e.g. for Pascal VOC. This model inherits from [PreTrainedModel](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. forwardtransformers.MobileNetV2ForSemanticSegmentation.forwardhttps://github.com/huggingface/transformers/blob/v5.0.0rc2/src/transformers/models/mobilenet_v2/modeling_mobilenet_v2.py#L522[{"name": "pixel_values", "val": ": typing.Optional[torch.Tensor] = None"}, {"name": "labels", "val": ": typing.Optional[torch.Tensor] = None"}, {"name": "output_hidden_states", "val": ": typing.Optional[bool] = None"}, {"name": "return_dict", "val": ": typing.Optional[bool] = None"}, {"name": "**kwargs", "val": ""}]- **pixel_values** (`torch.Tensor` of shape `(batch_size, num_channels, image_size, image_size)`, *optional*) -- The tensors corresponding to the input images. Pixel values can be obtained using [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor). See `MobileNetV2ImageProcessor.__call__()` for details (`processor_class` uses [MobileNetV2ImageProcessor](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ImageProcessor) for processing images). - **labels** (`torch.LongTensor` of shape `(batch_size, height, width)`, *optional*) -- Ground truth semantic segmentation maps for computing the loss. Indices should be in `[0, ..., config.num_labels - 1]`. If `config.num_labels > 1`, a classification loss is computed (Cross-Entropy). - **output_hidden_states** (`bool`, *optional*) -- Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. - **return_dict** (`bool`, *optional*) -- Whether or not to return a [ModelOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.0[transformers.modeling_outputs.SemanticSegmenterOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.SemanticSegmenterOutput) or `tuple(torch.FloatTensor)`A [transformers.modeling_outputs.SemanticSegmenterOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.SemanticSegmenterOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **loss** (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided) -- Classification (or regression if config.num_labels==1) loss. - **logits** (`torch.FloatTensor` of shape `(batch_size, config.num_labels, logits_height, logits_width)`) -- Classification scores for each pixel. The logits returned do not necessarily have the same size as the `pixel_values` passed as inputs. This is to avoid doing two interpolations and lose some quality when a user needs to resize the logits to the original image size as post-processing. You should always check your logits shape and resize as needed. - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, patch_size, hidden_size)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. - **attentions** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) -- Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, patch_size, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. The [MobileNetV2ForSemanticSegmentation](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2ForSemanticSegmentation) forward method, overrides the `__call__` special method. Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them. Examples: ```python >>> from transformers import AutoImageProcessor, MobileNetV2ForSemanticSegmentation >>> from PIL import Image >>> import requests >>> url = "http://images.cocodataset.org/val2017/000000039769.jpg" >>> image = Image.open(requests.get(url, stream=True).raw) >>> image_processor = AutoImageProcessor.from_pretrained("google/deeplabv3_mobilenet_v2_1.0_513") >>> model = MobileNetV2ForSemanticSegmentation.from_pretrained("google/deeplabv3_mobilenet_v2_1.0_513") >>> inputs = image_processor(images=image, return_tensors="pt") >>> with torch.no_grad(): ... outputs = model(**inputs) >>> # logits are of shape (batch_size, num_labels, height, width) >>> logits = outputs.logits ``` **Parameters:** config ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) : Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from_pretrained()](/docs/transformers/v5.0.0rc2/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights. **Returns:** `[transformers.modeling_outputs.SemanticSegmenterOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.SemanticSegmenterOutput) or `tuple(torch.FloatTensor)`` A [transformers.modeling_outputs.SemanticSegmenterOutput](/docs/transformers/v5.0.0rc2/en/main_classes/output#transformers.modeling_outputs.SemanticSegmenterOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileNetV2Config](/docs/transformers/v5.0.0rc2/en/model_doc/mobilenet_v2#transformers.MobileNetV2Config)) and inputs. - **loss** (`torch.FloatTensor` of shape `(1,)`, *optional*, returned when `labels` is provided) -- Classification (or regression if config.num_labels==1) loss. - **logits** (`torch.FloatTensor` of shape `(batch_size, config.num_labels, logits_height, logits_width)`) -- Classification scores for each pixel. The logits returned do not necessarily have the same size as the `pixel_values` passed as inputs. This is to avoid doing two interpolations and lose some quality when a user needs to resize the logits to the original image size as post-processing. You should always check your logits shape and resize as needed. - **hidden_states** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) -- Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, patch_size, hidden_size)`. Hidden-states of the model at the output of each layer plus the optional initial embedding outputs. - **attentions** (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) -- Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, patch_size, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.