# (Tensorflow) EfficientNet CondConv **EfficientNet** is a convolutional neural network architecture and scaling method that uniformly scales all dimensions of depth/width/resolution using a *compound coefficient*. Unlike conventional practice that arbitrary scales these factors, the EfficientNet scaling method uniformly scales network width, depth, and resolution with a set of fixed scaling coefficients. For example, if we want to use $2^N$ times more computational resources, then we can simply increase the network depth by $\alpha ^ N$, width by $\beta ^ N$, and image size by $\gamma ^ N$, where $\alpha, \beta, \gamma$ are constant coefficients determined by a small grid search on the original small model. EfficientNet uses a compound coefficient $\phi$ to uniformly scales network width, depth, and resolution in a principled way. The compound scaling method is justified by the intuition that if the input image is bigger, then the network needs more layers to increase the receptive field and more channels to capture more fine-grained patterns on the bigger image. The base EfficientNet-B0 network is based on the inverted bottleneck residual blocks of [MobileNetV2](https://paperswithcode.com/method/mobilenetv2), in addition to squeeze-and-excitation blocks. This collection of models amends EfficientNet by adding [CondConv](https://paperswithcode.com/method/condconv) convolutions. The weights from this model were ported from [Tensorflow/TPU](https://github.com/tensorflow/tpu). ## How do I use this model on an image? To load a pretrained model: ```python import timm model = timm.create_model('tf_efficientnet_cc_b0_4e', pretrained=True) model.eval() ``` To load and preprocess the image: ```python import urllib from PIL import Image from timm.data import resolve_data_config from timm.data.transforms_factory import create_transform config = resolve_data_config({}, model=model) transform = create_transform(**config) url, filename = ("https://github.com/pytorch/hub/raw/master/images/dog.jpg", "dog.jpg") urllib.request.urlretrieve(url, filename) img = Image.open(filename).convert('RGB') tensor = transform(img).unsqueeze(0) # transform and add batch dimension ``` To get the model predictions: ```python import torch with torch.no_grad(): out = model(tensor) probabilities = torch.nn.functional.softmax(out[0], dim=0) print(probabilities.shape) # prints: torch.Size([1000]) ``` To get the top-5 predictions class names: ```python # Get imagenet class mappings url, filename = ("https://raw.githubusercontent.com/pytorch/hub/master/imagenet_classes.txt", "imagenet_classes.txt") urllib.request.urlretrieve(url, filename) with open("imagenet_classes.txt", "r") as f: categories = [s.strip() for s in f.readlines()] # Print top categories per image top5_prob, top5_catid = torch.topk(probabilities, 5) for i in range(top5_prob.size(0)): print(categories[top5_catid[i]], top5_prob[i].item()) # prints class names and probabilities like: # [('Samoyed', 0.6425196528434753), ('Pomeranian', 0.04062102362513542), ('keeshond', 0.03186424449086189), ('white wolf', 0.01739676296710968), ('Eskimo dog', 0.011717947199940681)] ``` Replace the model name with the variant you want to use, e.g. `tf_efficientnet_cc_b0_4e`. You can find the IDs in the model summaries at the top of this page. To extract image features with this model, follow the [timm feature extraction examples](https://rwightman.github.io/pytorch-image-models/feature_extraction/), just change the name of the model you want to use. ## How do I finetune this model? You can finetune any of the pre-trained models just by changing the classifier (the last layer). ```python model = timm.create_model('tf_efficientnet_cc_b0_4e', pretrained=True, num_classes=NUM_FINETUNE_CLASSES) ``` To finetune on your own dataset, you have to write a training loop or adapt [timm's training script](https://github.com/rwightman/pytorch-image-models/blob/master/train.py) to use your dataset. ## How do I train this model? You can follow the [timm recipe scripts](https://rwightman.github.io/pytorch-image-models/scripts/) for training a new model afresh. ## Citation ```BibTeX @article{DBLP:journals/corr/abs-1904-04971, author = {Brandon Yang and Gabriel Bender and Quoc V. Le and Jiquan Ngiam}, title = {Soft Conditional Computation}, journal = {CoRR}, volume = {abs/1904.04971}, year = {2019}, url = {http://arxiv.org/abs/1904.04971}, archivePrefix = {arXiv}, eprint = {1904.04971}, timestamp = {Thu, 25 Apr 2019 13:55:01 +0200}, biburl = {https://dblp.org/rec/journals/corr/abs-1904-04971.bib}, bibsource = {dblp computer science bibliography, https://dblp.org} } ``` <!-- Type: model-index Collections: - Name: TF EfficientNet CondConv Paper: Title: 'CondConv: Conditionally Parameterized Convolutions for Efficient Inference' URL: https://paperswithcode.com/paper/soft-conditional-computation Models: - Name: tf_efficientnet_cc_b0_4e In Collection: TF EfficientNet CondConv Metadata: FLOPs: 224153788 Parameters: 13310000 File Size: 53490940 Architecture: - 1x1 Convolution - Average Pooling - Batch Normalization - CondConv - Convolution - Dense Connections - Dropout - Inverted Residual Block - Squeeze-and-Excitation Block - Swish Tasks: - Image Classification Training Techniques: - AutoAugment - Label Smoothing - RMSProp - Stochastic Depth - Weight Decay Training Data: - ImageNet ID: tf_efficientnet_cc_b0_4e LR: 0.256 Epochs: 350 Crop Pct: '0.875' Momentum: 0.9 Batch Size: 2048 Image Size: '224' Weight Decay: 1.0e-05 Interpolation: bicubic RMSProp Decay: 0.9 Label Smoothing: 0.1 BatchNorm Momentum: 0.99 Code: https://github.com/rwightman/pytorch-image-models/blob/9a25fdf3ad0414b4d66da443fe60ae0aa14edc84/timm/models/efficientnet.py#L1561 Weights: https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/tf_efficientnet_cc_b0_4e-4362b6b2.pth Results: - Task: Image Classification Dataset: ImageNet Metrics: Top 1 Accuracy: 77.32% Top 5 Accuracy: 93.32% - Name: tf_efficientnet_cc_b0_8e In Collection: TF EfficientNet CondConv Metadata: FLOPs: 224158524 Parameters: 24010000 File Size: 96287616 Architecture: - 1x1 Convolution - Average Pooling - Batch Normalization - CondConv - Convolution - Dense Connections - Dropout - Inverted Residual Block - Squeeze-and-Excitation Block - Swish Tasks: - Image Classification Training Techniques: - AutoAugment - Label Smoothing - RMSProp - Stochastic Depth - Weight Decay Training Data: - ImageNet ID: tf_efficientnet_cc_b0_8e LR: 0.256 Epochs: 350 Crop Pct: '0.875' Momentum: 0.9 Batch Size: 2048 Image Size: '224' Weight Decay: 1.0e-05 Interpolation: bicubic RMSProp Decay: 0.9 Label Smoothing: 0.1 BatchNorm Momentum: 0.99 Code: https://github.com/rwightman/pytorch-image-models/blob/9a25fdf3ad0414b4d66da443fe60ae0aa14edc84/timm/models/efficientnet.py#L1572 Weights: https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/tf_efficientnet_cc_b0_8e-66184a25.pth Results: - Task: Image Classification Dataset: ImageNet Metrics: Top 1 Accuracy: 77.91% Top 5 Accuracy: 93.65% - Name: tf_efficientnet_cc_b1_8e In Collection: TF EfficientNet CondConv Metadata: FLOPs: 370427824 Parameters: 39720000 File Size: 159206198 Architecture: - 1x1 Convolution - Average Pooling - Batch Normalization - CondConv - Convolution - Dense Connections - Dropout - Inverted Residual Block - Squeeze-and-Excitation Block - Swish Tasks: - Image Classification Training Techniques: - AutoAugment - Label Smoothing - RMSProp - Stochastic Depth - Weight Decay Training Data: - ImageNet ID: tf_efficientnet_cc_b1_8e LR: 0.256 Epochs: 350 Crop Pct: '0.882' Momentum: 0.9 Batch Size: 2048 Image Size: '240' Weight Decay: 1.0e-05 Interpolation: bicubic RMSProp Decay: 0.9 Label Smoothing: 0.1 BatchNorm Momentum: 0.99 Code: https://github.com/rwightman/pytorch-image-models/blob/9a25fdf3ad0414b4d66da443fe60ae0aa14edc84/timm/models/efficientnet.py#L1584 Weights: https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/tf_efficientnet_cc_b1_8e-f7c79ae1.pth Results: - Task: Image Classification Dataset: ImageNet Metrics: Top 1 Accuracy: 79.33% Top 5 Accuracy: 94.37% -->