From b37abd7afe7f0e43167b7bcddc136ce027943fe9 Mon Sep 17 00:00:00 2001 From: Niels Rogge Date: Wed, 3 Aug 2022 10:13:34 +0000 Subject: [PATCH] Create README.md --- README.md | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 README.md diff --git a/README.md b/README.md new file mode 100644 index 0000000..ddc1c74 --- /dev/null +++ b/README.md @@ -0,0 +1,83 @@ +--- +license: "cc-by-nc-4.0" +tags: +- vision +- video-classification +--- + +# VideoMAE (base-sized model, fine-tuned on Kinetics-400) + +VideoMAE model fine-tuned on Kinetics-400 in a self-supervised way. It was introduced in the paper [VideoMAE: Masked Autoencoders are Data-Efficient Learners for Self-Supervised Video Pre-Training](https://arxiv.org/abs/2203.12602) by Tong et al. and first released in [this repository](https://github.com/MCG-NJU/VideoMAE). + +Disclaimer: The team releasing VideoMAE did not write a model card for this model so this model card has been written by the Hugging Face team. + +## Model description + +VideoMAE is an extension of [Masked Autoencoders (MAE)](https://arxiv.org/abs/2111.06377) to video. The architecture of the model is very similar to that of a standard Vision Transformer (ViT), with a decoder on top for predicting pixel values for masked patches. + +Videos are presented to the model as a sequence of fixed-size patches (resolution 16x16), which are linearly embedded. One also adds a [CLS] token to the beginning of a sequence to use it for classification tasks. One also adds fixed sinus/cosinus position embeddings before feeding the sequence to the layers of the Transformer encoder. + +By pre-training the model, it learns an inner representation of videos that can then be used to extract features useful for downstream tasks: if you have a dataset of labeled videos for instance, you can train a standard classifier by placing a linear layer on top of the pre-trained encoder. One typically places a linear layer on top of the [CLS] token, as the last hidden state of this token can be seen as a representation of an entire video. + +## Intended uses & limitations + +You can use the raw model for video classification into one of the 400 possible Kinetics-400 labels. + +### How to use + +Here is how to use this model to classify a video: + +```python +from transformers import VideoMAEFeatureExtractor, VideoMAEForVideoClassification +import numpy as np +import torch + +video = list(np.random.randn(16, 3, 224, 224)) + +feature_extractor = VideoMAEFeatureExtractor.from_pretrained("MCG-NJU/videomae-base") +model = VideoMAEForVideoClassification.from_pretrained("MCG-NJU/videomae-base") + +inputs = feature_extractor(video, return_tensors="pt") + +with torch.no_grad(): + outputs = model(**inputs) + logits = outputs.logits + +predicted_class_idx = logits.argmax(-1).item() +print("Predicted class:", model.config.id2label[predicted_class_idx]) +``` + +For more code examples, we refer to the [documentation](https://huggingface.co/transformers/main/model_doc/videomae.html#). + +## Training data + +(to do, feel free to open a PR) + +## Training procedure + +### Preprocessing + +(to do, feel free to open a PR) + +### Pretraining + +(to do, feel free to open a PR) + +## Evaluation results + +(to do, feel free to open a PR) + +### BibTeX entry and citation info + +```bibtex +misc{https://doi.org/10.48550/arxiv.2203.12602, + doi = {10.48550/ARXIV.2203.12602}, + url = {https://arxiv.org/abs/2203.12602}, + author = {Tong, Zhan and Song, Yibing and Wang, Jue and Wang, Limin}, + keywords = {Computer Vision and Pattern Recognition (cs.CV), FOS: Computer and information sciences, FOS: Computer and information sciences}, + title = {VideoMAE: Masked Autoencoders are Data-Efficient Learners for Self-Supervised Video Pre-Training}, + publisher = {arXiv}, + year = {2022}, + copyright = {Creative Commons Attribution 4.0 International} +} +``` \ No newline at end of file