# coding=utf-8 # Copyright 2023 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. """FocalNet model configuration""" from ...configuration_utils import PretrainedConfig from ...utils import logging from ...utils.backbone_utils import BackboneConfigMixin, get_aligned_output_features_output_indices logger = logging.get_logger(__name__) class FocalNetConfig(BackboneConfigMixin, PretrainedConfig): r""" This is the configuration class to store the configuration of a [`FocalNetModel`]. It is used to instantiate a FocalNet 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 FocalNet [microsoft/focalnet-tiny](https://huggingface.co/microsoft/focalnet-tiny) architecture. Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the documentation from [`PretrainedConfig`] for more information. Args: image_size (`int`, *optional*, defaults to 224): The size (resolution) of each image. patch_size (`int`, *optional*, defaults to 4): The size (resolution) of each patch in the embeddings layer. num_channels (`int`, *optional*, defaults to 3): The number of input channels. embed_dim (`int`, *optional*, defaults to 96): Dimensionality of patch embedding. use_conv_embed (`bool`, *optional*, defaults to `False`): Whether to use convolutional embedding. The authors noted that using convolutional embedding usually improve the performance, but it's not used by default. hidden_sizes (`List[int]`, *optional*, defaults to `[192, 384, 768, 768]`): Dimensionality (hidden size) at each stage. depths (`list(int)`, *optional*, defaults to `[2, 2, 6, 2]`): Depth (number of layers) of each stage in the encoder. focal_levels (`list(int)`, *optional*, defaults to `[2, 2, 2, 2]`): Number of focal levels in each layer of the respective stages in the encoder. focal_windows (`list(int)`, *optional*, defaults to `[3, 3, 3, 3]`): Focal window size in each layer of the respective stages in the encoder. hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`): The non-linear activation function (function or string) in the encoder. If string, `"gelu"`, `"relu"`, `"selu"` and `"gelu_new"` are supported. mlp_ratio (`float`, *optional*, defaults to 4.0): Ratio of MLP hidden dimensionality to embedding dimensionality. hidden_dropout_prob (`float`, *optional*, defaults to 0.0): The dropout probability for all fully connected layers in the embeddings and encoder. drop_path_rate (`float`, *optional*, defaults to 0.1): Stochastic depth rate. use_layerscale (`bool`, *optional*, defaults to `False`): Whether to use layer scale in the encoder. layerscale_value (`float`, *optional*, defaults to 0.0001): The initial value of the layer scale. use_post_layernorm (`bool`, *optional*, defaults to `False`): Whether to use post layer normalization in the encoder. use_post_layernorm_in_modulation (`bool`, *optional*, defaults to `False`): Whether to use post layer normalization in the modulation layer. normalize_modulator (`bool`, *optional*, defaults to `False`): Whether to normalize the modulator. 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 1e-05): The epsilon used by the layer normalization layers. encoder_stride (`int`, *optional*, defaults to 32): Factor to increase the spatial resolution by in the decoder head for masked image modeling. out_features (`List[str]`, *optional*): If used as backbone, list of features to output. Can be any of `"stem"`, `"stage1"`, `"stage2"`, etc. (depending on how many stages the model has). If unset and `out_indices` is set, will default to the corresponding stages. If unset and `out_indices` is unset, will default to the last stage. Must be in the same order as defined in the `stage_names` attribute. out_indices (`List[int]`, *optional*): If used as backbone, list of indices of features to output. Can be any of 0, 1, 2, etc. (depending on how many stages the model has). If unset and `out_features` is set, will default to the corresponding stages. If unset and `out_features` is unset, will default to the last stage. Must be in the same order as defined in the `stage_names` attribute. Example: ```python >>> from transformers import FocalNetConfig, FocalNetModel >>> # Initializing a FocalNet microsoft/focalnet-tiny style configuration >>> configuration = FocalNetConfig() >>> # Initializing a model (with random weights) from the microsoft/focalnet-tiny style configuration >>> model = FocalNetModel(configuration) >>> # Accessing the model configuration >>> configuration = model.config ```""" model_type = "focalnet" def __init__( self, image_size=224, patch_size=4, num_channels=3, embed_dim=96, use_conv_embed=False, hidden_sizes=[192, 384, 768, 768], depths=[2, 2, 6, 2], focal_levels=[2, 2, 2, 2], focal_windows=[3, 3, 3, 3], hidden_act="gelu", mlp_ratio=4.0, hidden_dropout_prob=0.0, drop_path_rate=0.1, use_layerscale=False, layerscale_value=1e-4, use_post_layernorm=False, use_post_layernorm_in_modulation=False, normalize_modulator=False, initializer_range=0.02, layer_norm_eps=1e-5, encoder_stride=32, out_features=None, out_indices=None, **kwargs, ): super().__init__(**kwargs) self.image_size = image_size self.patch_size = patch_size self.num_channels = num_channels self.embed_dim = embed_dim self.use_conv_embed = use_conv_embed self.hidden_sizes = hidden_sizes self.depths = depths self.focal_levels = focal_levels self.focal_windows = focal_windows self.hidden_act = hidden_act self.mlp_ratio = mlp_ratio self.hidden_dropout_prob = hidden_dropout_prob self.drop_path_rate = drop_path_rate self.use_layerscale = use_layerscale self.layerscale_value = layerscale_value self.use_post_layernorm = use_post_layernorm self.use_post_layernorm_in_modulation = use_post_layernorm_in_modulation self.normalize_modulator = normalize_modulator self.initializer_range = initializer_range self.layer_norm_eps = layer_norm_eps self.encoder_stride = encoder_stride self.stage_names = ["stem"] + [f"stage{idx}" for idx in range(1, len(self.depths) + 1)] self._out_features, self._out_indices = get_aligned_output_features_output_indices( out_features=out_features, out_indices=out_indices, stage_names=self.stage_names ) __all__ = ["FocalNetConfig"]