# 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. """Fast Image processor class for LLaVa-NeXT.""" from typing import Optional, Union import torch from torchvision.transforms.v2 import functional as F from ...image_processing_utils import BatchFeature, get_patch_output_size, select_best_resolution from ...image_processing_utils_fast import ( BaseImageProcessorFast, DefaultFastImageProcessorKwargs, divide_to_patches, group_images_by_shape, reorder_images, ) from ...image_utils import ( OPENAI_CLIP_MEAN, OPENAI_CLIP_STD, ChannelDimension, ImageInput, PILImageResampling, SizeDict, get_image_size, ) from ...processing_utils import Unpack from ...utils import ( TensorType, auto_docstring, ) class LlavaNextFastImageProcessorKwargs(DefaultFastImageProcessorKwargs): """ image_grid_pinpoints (`list[list[int]]`, *optional*): A list of possible resolutions to use for processing high resolution images. The best resolution is selected based on the original size of the image. Can be overridden by `image_grid_pinpoints` in the `preprocess` method. """ image_grid_pinpoints: Optional[list[list[int]]] @auto_docstring class LlavaNextImageProcessorFast(BaseImageProcessorFast): # To be checked against the slow image processor # None values left after checking can be removed resample = PILImageResampling.BICUBIC image_mean = OPENAI_CLIP_MEAN image_std = OPENAI_CLIP_STD size = {"shortest_edge": 224} default_to_square = False crop_size = {"height": 224, "width": 224} do_resize = True do_center_crop = True do_rescale = True do_normalize = True do_convert_rgb = True do_pad = True image_grid_pinpoints = [[336, 672], [672, 336], [672, 672], [1008, 336], [336, 1008]] valid_kwargs = LlavaNextFastImageProcessorKwargs def __init__(self, **kwargs: Unpack[LlavaNextFastImageProcessorKwargs]): super().__init__(**kwargs) @auto_docstring def preprocess(self, images: ImageInput, **kwargs: Unpack[LlavaNextFastImageProcessorKwargs]) -> BatchFeature: return super().preprocess(images, **kwargs) def _resize_for_patching( self, image: "torch.Tensor", target_resolution: tuple, interpolation: "F.InterpolationMode", input_data_format: ChannelDimension, ) -> "torch.Tensor": """ Resizes an image to a target resolution while maintaining aspect ratio. Args: image ("torch.Tensor"): The input image. target_resolution (tuple): The target resolution (height, width) of the image. interpolation (`InterpolationMode`): Resampling filter to use if resizing the image. input_data_format (`ChannelDimension` or `str`): The channel dimension format of the input image. Returns: "torch.Tensor": The resized and padded image. """ new_height, new_width = get_patch_output_size(image, target_resolution, input_data_format) # Resize the image resized_image = self.resize( image=image, size=SizeDict(height=new_height, width=new_width), interpolation=interpolation, ) return resized_image def _get_padding_size(self, original_resolution: tuple, target_resolution: tuple): original_height, original_width = original_resolution target_height, target_width = target_resolution paste_x, r_x = divmod(target_width - original_width, 2) paste_y, r_y = divmod(target_height - original_height, 2) return [paste_x, paste_y, paste_x + r_x, paste_y + r_y] def _pad_for_patching( self, image: "torch.Tensor", target_resolution: tuple, input_data_format: ChannelDimension ) -> "torch.Tensor": """ Pad an image to a target resolution while maintaining aspect ratio. """ new_resolution = get_patch_output_size(image, target_resolution, input_data_format) padding = self._get_padding_size(new_resolution, target_resolution) padded_image = F.pad(image, padding=padding) return padded_image def _get_image_patches( self, image: "torch.Tensor", grid_pinpoints, size: tuple, patch_size: int, interpolation: "F.InterpolationMode", ) -> list["torch.Tensor"]: """ Process an image with variable resolutions by dividing it into patches. Args: image ("torch.Tensor"): The input image to be processed. grid_pinpoints (List): A string representation of a list of possible resolutions. size (`tuple`): Size to resize the original image to. patch_size (`int`): Size of the patches to divide the image into. interpolation (`"InterpolationMode"`): Resampling filter to use if resizing the image. Returns: list["torch.Tensor"]: A list of NumPy arrays containing the processed image patches. """ if not isinstance(grid_pinpoints, list): raise TypeError("grid_pinpoints must be a list of possible resolutions.") possible_resolutions = grid_pinpoints image_size = get_image_size(image, channel_dim=ChannelDimension.FIRST) best_resolution = select_best_resolution(image_size, possible_resolutions) resized_image = self._resize_for_patching( image, best_resolution, interpolation=interpolation, input_data_format=ChannelDimension.FIRST ) padded_image = self._pad_for_patching(resized_image, best_resolution, input_data_format=ChannelDimension.FIRST) patches = divide_to_patches(padded_image, patch_size=patch_size) resized_original_image = F.resize(image, size=size, interpolation=interpolation) image_patches = [resized_original_image] + patches return image_patches def _pad_for_batching( self, pixel_values: list["torch.Tensor"], ) -> list["torch.Tensor"]: """ Pads images on the `num_of_patches` dimension with zeros to form a batch of same number of patches. Args: pixel_values (`list[torch.Tensor]`): An array of pixel values of each images of shape (`batch_size`, `num_patches`, `image_in_3D`) Returns: list[`torch.Tensor`]: The padded images. """ max_patch = max(len(x) for x in pixel_values) pixel_values = [ torch.nn.functional.pad(image, pad=[0, 0, 0, 0, 0, 0, 0, max_patch - image.shape[0]]) for image in pixel_values ] return pixel_values def _preprocess( self, images: list["torch.Tensor"], do_resize: bool, size: SizeDict, image_grid_pinpoints: list[list[int]], interpolation: Optional["F.InterpolationMode"], do_center_crop: bool, crop_size: SizeDict, do_rescale: bool, rescale_factor: float, do_normalize: bool, image_mean: Optional[Union[float, list[float]]], image_std: Optional[Union[float, list[float]]], do_pad: bool, disable_grouping: Optional[bool], return_tensors: Optional[Union[str, TensorType]], **kwargs, ) -> BatchFeature: processed_images = [] image_sizes = [] # Determine the size tuple if size and size.height and size.width: size_tuple = (size.height, size.width) else: size_tuple = (size.shortest_edge, size.shortest_edge) # Determine the patch size if crop_size and crop_size.height: patch_size = crop_size.height elif size and size.height: patch_size = size.height else: patch_size = size.shortest_edge for image in images: image_patches = self._get_image_patches( image, image_grid_pinpoints, size=size_tuple, patch_size=patch_size, interpolation=interpolation, ) # Group images by size for batched processing processed_image_patches_grouped = {} grouped_image_patches, grouped_image_patches_index = group_images_by_shape( image_patches, disable_grouping=disable_grouping ) for shape, stacked_image_patches in grouped_image_patches.items(): if do_resize: stacked_image_patches = self.resize( image=stacked_image_patches, size=size, interpolation=interpolation, ) if do_center_crop: stacked_image_patches = self.center_crop(stacked_image_patches, crop_size) # Fused rescale and normalize stacked_image_patches = self.rescale_and_normalize( stacked_image_patches, do_rescale, rescale_factor, do_normalize, image_mean, image_std ) processed_image_patches_grouped[shape] = stacked_image_patches processed_image_patches = reorder_images(processed_image_patches_grouped, grouped_image_patches_index) processed_image_patches = ( torch.stack(processed_image_patches, dim=0) if return_tensors else processed_image_patches ) processed_images.append(processed_image_patches) image_sizes.append(get_image_size(image, ChannelDimension.FIRST)) if do_pad: processed_images = self._pad_for_batching(processed_images) processed_images = torch.stack(processed_images, dim=0) if return_tensors else processed_images return BatchFeature( data={"pixel_values": processed_images, "image_sizes": image_sizes}, tensor_type=return_tensors ) __all__ = ["LlavaNextImageProcessorFast"]