
 
EfficientFormer
	
Overview
	
The EfficientFormer model was proposed in EfficientFormer: Vision Transformers at MobileNet Speed
by Yanyu Li, Geng Yuan, Yang Wen, Eric Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.  EfficientFormer proposes a
dimension-consistent pure transformer that can be run on mobile devices for dense prediction tasks like image classification, object
detection and semantic segmentation.
The abstract from the paper is the following:
Vision Transformers (ViT) have shown rapid progress in computer vision tasks, achieving promising results on various benchmarks.
However, due to the massive number of parameters and model design, e.g., attention mechanism, ViT-based models are generally
times slower than lightweight convolutional networks. Therefore, the deployment of ViT for real-time applications is particularly
challenging, especially on resource-constrained hardware such as mobile devices. Recent efforts try to reduce the computation
complexity of ViT through network architecture search or hybrid design with MobileNet block, yet the inference speed is still
unsatisfactory. This leads to an important question: can transformers run as fast as MobileNet while obtaining high performance?
To answer this, we first revisit the network architecture and operators used in ViT-based models and identify inefficient designs.
Then we introduce a dimension-consistent pure transformer (without MobileNet blocks) as a design paradigm.
Finally, we perform latency-driven slimming to get a series of final models dubbed EfficientFormer.
Extensive experiments show the superiority of EfficientFormer in performance and speed on mobile devices.
Our fastest model, EfficientFormer-L1, achieves 79.2% top-1 accuracy on ImageNet-1K with only 1.6 ms inference latency on
iPhone 12 (compiled with CoreML), which { runs as fast as MobileNetV2×1.4 (1.6 ms, 74.7% top-1),} and our largest model,
EfficientFormer-L7, obtains 83.3% accuracy with only 7.0 ms latency. Our work proves that properly designed transformers can
reach extremely low latency on mobile devices while maintaining high performance.
This model was contributed by novice03 and Bearnardd.
The original code can be found here. The TensorFlow version of this model was added by D-Roberts.
Documentation resources
	
Image classification task guide
EfficientFormerConfig
	
class transformers.EfficientFormerConfig
<
source
>
(
depths: typing.List[int] = [3, 2, 6, 4]
hidden_sizes: typing.List[int] = [48, 96, 224, 448]
downsamples: typing.List[bool] = [True, True, True, True]
dim: int = 448
key_dim: int = 32
attention_ratio: int = 4
resolution: int = 7
num_hidden_layers: int = 5
num_attention_heads: int = 8
mlp_expansion_ratio: int = 4
hidden_dropout_prob: float = 0.0
patch_size: int = 16
num_channels: int = 3
pool_size: int = 3
downsample_patch_size: int = 3
downsample_stride: int = 2
downsample_pad: int = 1
drop_path_rate: float = 0.0
num_meta3d_blocks: int = 1
distillation: bool = True
use_layer_scale: bool = True
layer_scale_init_value: float = 1e-05
hidden_act: str = 'gelu'
initializer_range: float = 0.02
layer_norm_eps: float = 1e-12
image_size: int = 224
batch_norm_eps: float = 1e-05
**kwargs
)
Parameters 
depths (List(int), optional, defaults to [3, 2, 6, 4]) —
Depth of each stage.
hidden_sizes (List(int), optional, defaults to [48, 96, 224, 448]) —
Dimensionality of each stage.
downsamples (List(bool), optional, defaults to [True, True, True, True]) —
Whether or not to downsample inputs between two stages.
dim (int, optional, defaults to 448) —
Number of channels in Meta3D layers
key_dim (int, optional, defaults to 32) —
The size of the key in meta3D block.
attention_ratio (int, optional, defaults to 4) —
Ratio of the dimension of the query and value to the dimension of the key in MSHA block
resolution (int, optional, defaults to 7) —
Size of each patch
num_hidden_layers (int, optional, defaults to 5) —
Number of hidden layers in the Transformer encoder.
num_attention_heads (int, optional, defaults to 8) —
Number of attention heads for each attention layer in the 3D MetaBlock.
mlp_expansion_ratio (int, optional, defaults to 4) —
Ratio of size of the hidden dimensionality of an MLP to the dimensionality of its input.
hidden_dropout_prob (float, optional, defaults to 0.1) —
The dropout probability for all fully connected layers in the embeddings and encoder.
patch_size (int, optional, defaults to 16) —
The size (resolution) of each patch.
num_channels (int, optional, defaults to 3) —
The number of input channels.
pool_size (int, optional, defaults to 3) —
Kernel size of pooling layers.
downsample_patch_size (int, optional, defaults to 3) —
The size of patches in downsampling layers.
downsample_stride (int, optional, defaults to 2) —
The stride of convolution kernels in downsampling layers.
downsample_pad (int, optional, defaults to 1) —
Padding in downsampling layers.
drop_path_rate (int, optional, defaults to 0) —
Rate at which to increase dropout probability in DropPath.
num_meta3d_blocks (int, optional, defaults to 1) —
The number of 3D MetaBlocks in the last stage.
distillation (bool, optional, defaults to True) —
Whether to add a distillation head.
use_layer_scale (bool, optional, defaults to True) —
Whether to scale outputs from token mixers.
layer_scale_init_value (float, optional, defaults to 1e-5) —
Factor by which outputs from token mixers are scaled.
hidden_act (str or function, optional, defaults to "gelu") —
The non-linear activation function (function or string) in the encoder and pooler. If string, "gelu",
"relu", "selu" and "gelu_new" are supported.
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-12) —
The epsilon used by the layer normalization layers.
image_size (int, optional, defaults to 224) —
The size (resolution) of each image.
This is the configuration class to store the configuration of an EfficientFormerModel. It is used to
instantiate an EfficientFormer 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 EfficientFormer
snap-research/efficientformer-l1 architecture.
Configuration objects inherit from PretrainedConfig and can be used to control the model outputs. Read the
documentation from PretrainedConfig for more information.
Example:
	Copied
 from transformers import EfficientFormerConfig, EfficientFormerModel
 # Initializing a EfficientFormer efficientformer-l1 style configuration
 configuration = EfficientFormerConfig()
 # Initializing a EfficientFormerModel (with random weights) from the efficientformer-l3 style configuration
 model = EfficientFormerModel(configuration)
 # Accessing the model configuration
 configuration = model.config
EfficientFormerImageProcessor
	
class transformers.EfficientFormerImageProcessor
<
source
>
(
do_resize: bool = True
size: typing.Union[typing.Dict[str, int], NoneType] = None
resample: Resampling = <Resampling.BICUBIC: 3>
do_center_crop: bool = True
do_rescale: bool = True
rescale_factor: typing.Union[int, float] = 0.00392156862745098
crop_size: typing.Dict[str, int] = None
do_normalize: bool = True
image_mean: typing.Union[float, typing.List[float], NoneType] = None
image_std: typing.Union[float, typing.List[float], NoneType] = None
**kwargs
)
Parameters 
do_resize (bool, optional, defaults to True) —
Whether to resize the image’s (height, width) dimensions to the specified (size["height"], size["width"]). Can be overridden by the do_resize parameter in the preprocess method.
size (dict, optional, defaults to {"height" -- 224, "width": 224}):
Size of the output image after resizing. Can be overridden by the size parameter 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 to the specified crop_size. Can be overridden by do_center_crop in the
preprocess method.
crop_size (Dict[str, int] optional, defaults to 224) —
Size of the output image after applying center_crop. Can be overridden by crop_size 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.
Constructs a EfficientFormer image processor.
preprocess
<
source
>
(
images: typing.Union[ForwardRef('PIL.Image.Image'), numpy.ndarray, ForwardRef('torch.Tensor'), typing.List[ForwardRef('PIL.Image.Image')], typing.List[numpy.ndarray], typing.List[ForwardRef('torch.Tensor')]]
do_resize: typing.Optional[bool] = None
size: typing.Dict[str, int] = None
resample: Resampling = None
do_center_crop: bool = None
crop_size: int = None
do_rescale: typing.Optional[bool] = None
rescale_factor: typing.Optional[float] = None
do_normalize: typing.Optional[bool] = None
image_mean: typing.Union[float, typing.List[float], NoneType] = None
image_std: typing.Union[float, typing.List[float], NoneType] = None
return_tensors: typing.Union[str, transformers.utils.generic.TensorType, NoneType] = None
data_format: typing.Union[str, transformers.image_utils.ChannelDimension] = <ChannelDimension.FIRST: 'channels_first'>
**kwargs
)
Parameters 
images (ImageInput) —
Image 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) —
Dictionary in the format {"height": h, "width": w} specifying the size of the output image after
resizing.
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.
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.
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_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.
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.
Preprocess an image or batch of images.
EfficientFormerModel
	
class transformers.EfficientFormerModel
<
source
>
(
config: EfficientFormerConfig
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
The bare EfficientFormer Model transformer outputting raw hidden-states without any specific head on top.
This model is a PyTorch 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.
forward
<
source
>
(
pixel_values: typing.Optional[torch.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
)
→
transformers.modeling_outputs.BaseModelOutputWithPooling or tuple(torch.FloatTensor)
Parameters 
pixel_values (torch.FloatTensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using ViTImageProcessor. See
ViTImageProcessor.preprocess() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
Returns
transformers.modeling_outputs.BaseModelOutputWithPooling or tuple(torch.FloatTensor)
A transformers.modeling_outputs.BaseModelOutputWithPooling 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 (EfficientFormerConfig) and inputs.
last_hidden_state (torch.FloatTensor of shape (batch_size, sequence_length, hidden_size)) — 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 of the first token of the sequence (classification token) after further processing
through the layers used for the auxiliary pretraining task. E.g. for BERT-family of models, this returns
the classification token after processing through a linear layer and a tanh activation function. The linear
layer weights are trained from the next sentence prediction (classification) objective during pretraining.
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, sequence_length, 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, sequence_length, sequence_length).
Attentions weights after the attention softmax, used to compute the weighted average in the self-attention
heads.
The EfficientFormerModel 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:
	Copied
 from transformers import AutoImageProcessor, EfficientFormerModel
 import torch
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = EfficientFormerModel.from_pretrained("snap-research/efficientformer-l1-300")
 inputs = image_processor(image, return_tensors="pt")
 with torch.no_grad():
...     outputs = model(**inputs)
 last_hidden_states = outputs.last_hidden_state
 list(last_hidden_states.shape)
[1, 49, 448]
EfficientFormerForImageClassification
	
class transformers.EfficientFormerForImageClassification
<
source
>
(
config: EfficientFormerConfig
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
EfficientFormer Model transformer with an image classification head on top (a linear layer on top of the final
hidden state of the [CLS] token) e.g. for ImageNet.
This model is a PyTorch 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.
forward
<
source
>
(
pixel_values: typing.Optional[torch.Tensor] = None
labels: typing.Optional[torch.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
)
→
transformers.modeling_outputs.ImageClassifierOutput or tuple(torch.FloatTensor)
Parameters 
pixel_values (torch.FloatTensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using ViTImageProcessor. See
ViTImageProcessor.preprocess() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
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).
Returns
transformers.modeling_outputs.ImageClassifierOutput or tuple(torch.FloatTensor)
A transformers.modeling_outputs.ImageClassifierOutput 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 (EfficientFormerConfig) 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, sequence_length, hidden_size). Hidden-states
(also called feature maps) of the model at the output of each stage.
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 EfficientFormerForImageClassification 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:
	Copied
 from transformers import AutoImageProcessor, EfficientFormerForImageClassification
 import torch
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = EfficientFormerForImageClassification.from_pretrained("snap-research/efficientformer-l1-300")
 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])
Egyptian cat
EfficientFormerForImageClassificationWithTeacher
	
class transformers.EfficientFormerForImageClassificationWithTeacher
<
source
>
(
config: EfficientFormerConfig
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
EfficientFormer Model transformer with image classification heads on top (a linear layer on top of the final hidden
state of the [CLS] token and a linear layer on top of the final hidden state of the distillation token) e.g. for
ImageNet.
This model supports inference-only. Fine-tuning with distillation (i.e. with a teacher) is not yet
supported.
This model is a PyTorch 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.
forward
<
source
>
(
pixel_values: typing.Optional[torch.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
)
→
transformers.models.efficientformer.modeling_efficientformer.EfficientFormerForImageClassificationWithTeacherOutput or tuple(torch.FloatTensor)
Parameters 
pixel_values (torch.FloatTensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using ViTImageProcessor. See
ViTImageProcessor.preprocess() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
Returns
transformers.models.efficientformer.modeling_efficientformer.EfficientFormerForImageClassificationWithTeacherOutput or tuple(torch.FloatTensor)
A transformers.models.efficientformer.modeling_efficientformer.EfficientFormerForImageClassificationWithTeacherOutput 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 (EfficientFormerConfig) and inputs.
logits (torch.FloatTensor of shape (batch_size, config.num_labels)) — Prediction scores as the average of the cls_logits and distillation logits.
cls_logits (torch.FloatTensor of shape (batch_size, config.num_labels)) — Prediction scores of the classification head (i.e. the linear layer on top of the final hidden state of the
class token).
distillation_logits (torch.FloatTensor of shape (batch_size, config.num_labels)) — Prediction scores of the distillation head (i.e. the linear layer on top of the final hidden state of the
distillation token).
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 + one for the output of each layer) of
shape (batch_size, sequence_length, hidden_size). Hidden-states of the model at the output of each layer
plus the 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, sequence_length, sequence_length). Attentions weights after the attention softmax, used to compute the weighted average in
the self-attention heads.
The EfficientFormerForImageClassificationWithTeacher 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:
	Copied
 from transformers import AutoImageProcessor, EfficientFormerForImageClassificationWithTeacher
 import torch
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = EfficientFormerForImageClassificationWithTeacher.from_pretrained("snap-research/efficientformer-l1-300")
 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])
Egyptian cat
TFEfficientFormerModel
	
class transformers.TFEfficientFormerModel
<
source
>
(
*args
**kwargs
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
The bare EfficientFormer Model transformer outputting raw hidden-states without any specific head on top.
This model is a TensorFlow
tf.keras.layers.Layer. Use it as a regular
TensorFlow Module and refer to the TensorFlow documentation for all matter related to general usage and behavior.
call
<
source
>
(
pixel_values: typing.Optional[tensorflow.python.framework.ops.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
training: bool = False
)
→
transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling or tuple(tf.Tensor)
Parameters 
pixel_values ((tf.Tensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using AutoImageProcessor. See
EfficientFormerImageProcessor.call() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
Returns
transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling or tuple(tf.Tensor)
A transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling or a tuple of tf.Tensor (if
return_dict=False is passed or when config.return_dict=False) comprising various elements depending on the
configuration (EfficientFormerConfig) and inputs.
last_hidden_state (tf.Tensor of shape (batch_size, sequence_length, hidden_size)) — Sequence of hidden-states at the output of the last layer of the model.
pooler_output (tf.Tensor of shape (batch_size, hidden_size)) — Last layer hidden-state of the first token of the sequence (classification token) further processed by a
Linear layer and a Tanh activation function. The Linear layer weights are trained from the next sentence
prediction (classification) objective during pretraining.
This output is usually not a good summary of the semantic content of the input, you’re often better with
averaging or pooling the sequence of hidden-states for the whole input sequence.
hidden_states (tuple(tf.Tensor), optional, returned when output_hidden_states=True is passed or when config.output_hidden_states=True) — Tuple of tf.Tensor (one for the output of the embeddings + one for the output of each layer) of shape
(batch_size, sequence_length, hidden_size).
Hidden-states of the model at the output of each layer plus the initial embedding outputs.
attentions (tuple(tf.Tensor), optional, returned when output_attentions=True is passed or when config.output_attentions=True) — Tuple of tf.Tensor (one for each layer) of shape (batch_size, num_heads, sequence_length, sequence_length).
Attentions weights after the attention softmax, used to compute the weighted average in the self-attention
heads.
The TFEfficientFormerModel 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:
	Copied
 from transformers import AutoImageProcessor, TFEfficientFormerModel
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = TFEfficientFormerModel.from_pretrained("snap-research/efficientformer-l1-300")
 inputs = image_processor(image, return_tensors="tf")
 outputs = model(**inputs)
 last_hidden_states = outputs.last_hidden_state
 list(last_hidden_states.shape)
[1, 49, 448]
TFEfficientFormerForImageClassification
	
class transformers.TFEfficientFormerForImageClassification
<
source
>
(
*args
**kwargs
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
EfficientFormer Model transformer with an image classification head on top of pooled last hidden state, e.g. for
ImageNet.
This model is a TensorFlow
tf.keras.layers.Layer. Use it as a regular
TensorFlow Module and refer to the TensorFlow documentation for all matter related to general usage and behavior.
call
<
source
>
(
pixel_values: typing.Optional[tensorflow.python.framework.ops.Tensor] = None
labels: typing.Optional[tensorflow.python.framework.ops.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
training: bool = False
)
→
transformers.modeling_tf_outputs.TFImageClassifierOutput or tuple(tf.Tensor)
Parameters 
pixel_values ((tf.Tensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using AutoImageProcessor. See
EfficientFormerImageProcessor.call() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
labels (tf.Tensor 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).
Returns
transformers.modeling_tf_outputs.TFImageClassifierOutput or tuple(tf.Tensor)
A transformers.modeling_tf_outputs.TFImageClassifierOutput or a tuple of tf.Tensor (if
return_dict=False is passed or when config.return_dict=False) comprising various elements depending on the
configuration (EfficientFormerConfig) and inputs.
loss (tf.Tensor of shape (1,), optional, returned when labels is provided) — Classification (or regression if config.num_labels==1) loss.
logits (tf.Tensor of shape (batch_size, config.num_labels)) — Classification (or regression if config.num_labels==1) scores (before SoftMax).
hidden_states (tuple(tf.Tensor), optional, returned when output_hidden_states=True is passed or when config.output_hidden_states=True) — Tuple of tf.Tensor (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, sequence_length, hidden_size). Hidden-states (also called
feature maps) of the model at the output of each stage.
attentions (tuple(tf.Tensor), optional, returned when output_attentions=True is passed or when config.output_attentions=True) — Tuple of tf.Tensor (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 TFEfficientFormerForImageClassification 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:
	Copied
 from transformers import AutoImageProcessor, TFEfficientFormerForImageClassification
 import tensorflow as tf
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = TFEfficientFormerForImageClassification.from_pretrained("snap-research/efficientformer-l1-300")
 inputs = image_processor(image, return_tensors="tf")
 logits = model(**inputs).logits
 # model predicts one of the 1000 ImageNet classes
 predicted_label = int(tf.math.argmax(logits, axis=-1))
 print(model.config.id2label[predicted_label])
LABEL_281
TFEfficientFormerForImageClassificationWithTeacher
	
class transformers.TFEfficientFormerForImageClassificationWithTeacher
<
source
>
(
*args
**kwargs
)
Parameters 
config (EfficientFormerConfig) — 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() method to load the model weights.
EfficientFormer Model transformer with image classification heads on top (a linear layer on top of the final hidden
state and a linear layer on top of the final hidden state of the distillation token) e.g. for ImageNet.
.. warning::
This model supports inference-only. Fine-tuning with distillation (i.e. with a teacher) is not yet
supported.
This model is a TensorFlow
tf.keras.layers.Layer. Use it as a regular
TensorFlow Module and refer to the TensorFlow documentation for all matter related to general usage and behavior.
call
<
source
>
(
pixel_values: typing.Optional[tensorflow.python.framework.ops.Tensor] = None
output_attentions: typing.Optional[bool] = None
output_hidden_states: typing.Optional[bool] = None
return_dict: typing.Optional[bool] = None
training: bool = False
)
→
transformers.models.efficientformer.modeling_tf_efficientformer.TFEfficientFormerForImageClassificationWithTeacherOutput or tuple(tf.Tensor)
Parameters 
pixel_values ((tf.Tensor of shape (batch_size, num_channels, height, width)) —
Pixel values. Pixel values can be obtained using AutoImageProcessor. See
EfficientFormerImageProcessor.call() for details.
output_attentions (bool, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions under returned
tensors for more detail.
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 instead of a plain tuple.
Returns
transformers.models.efficientformer.modeling_tf_efficientformer.TFEfficientFormerForImageClassificationWithTeacherOutput or tuple(tf.Tensor)
A transformers.models.efficientformer.modeling_tf_efficientformer.TFEfficientFormerForImageClassificationWithTeacherOutput or a tuple of tf.Tensor (if
return_dict=False is passed or when config.return_dict=False) comprising various elements depending on the
configuration (EfficientFormerConfig) and inputs.
The TFEfficientFormerForImageClassificationWithTeacher 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.
Output type of EfficientFormerForImageClassificationWithTeacher.
logits (tf.Tensor of shape (batch_size, config.num_labels)) — Prediction scores as the average of the cls_logits and distillation logits.
cls_logits (tf.Tensor of shape (batch_size, config.num_labels)) — Prediction scores of the classification head (i.e. the linear layer on top of the final hidden state of the
class token).
distillation_logits (tf.Tensor of shape (batch_size, config.num_labels)) — Prediction scores of the distillation head (i.e. the linear layer on top of the final hidden state of the
distillation token).
hidden_states (tuple(tf.Tensor), optional, returned when output_hidden_states=True is passed or when
config.output_hidden_states=True) — Tuple of tf.Tensor (one for the output of the embeddings + one for the output of each layer) of shape
(batch_size, sequence_length, hidden_size). Hidden-states of the model at the output of each layer plus
the initial embedding outputs.
attentions (tuple(tf.Tensor), optional, returned when output_attentions=True is passed or when
config.output_attentions=True) — Tuple of tf.Tensor (one for each layer) of shape (batch_size, num_heads, sequence_length, sequence_length). Attentions weights after the attention softmax, used to compute the weighted average in
the self-attention heads.
Example:
	Copied
 from transformers import AutoImageProcessor, TFEfficientFormerForImageClassificationWithTeacher
 import tensorflow as tf
 from datasets import load_dataset
 dataset = load_dataset("huggingface/cats-image")
 image = dataset["test"]["image"][0]
 image_processor = AutoImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
 model = TFEfficientFormerForImageClassificationWithTeacher.from_pretrained("snap-research/efficientformer-l1-300")
 inputs = image_processor(image, return_tensors="tf")
 logits = model(**inputs).logits
 # model predicts one of the 1000 ImageNet classes
 predicted_label = int(tf.math.argmax(logits, axis=-1))
 print(model.config.id2label[predicted_label])
LABEL_281
←DPT
EfficientNet→
EfficientFormer
Overview
Documentation resources
EfficientFormerConfig
EfficientFormerImageProcessor
EfficientFormerModel
EfficientFormerForImageClassification
EfficientFormerForImageClassificationWithTeacher
TFEfficientFormerModel
TFEfficientFormerForImageClassification
TFEfficientFormerForImageClassificationWithTeacher
