A simple approach to emable dense segmentation with ViT.

Related tags

Deep LearningViTSeg
Overview

Vision Transformer Segmentation Network

This implementation of ViT in pytorch uses a super simple and straight-forward way of generating an output of the same size as the input by applying the inverse rearrange operation on all the predicted outputs. This enables convolution-free multi-class segmentation.

Most of the code is taken from https://github.com/lucidrains/vit-pytorch/blob/main/vit_pytorch/vit.py

Default Architecture Parameters:

model = ViTSeg( image_size=112, 
                channels=1,
                patch_size=7, 
                num_classes=1, 
                dim=768, 
                depth=6, 
                heads=12, 
                mlp_dim=2048, 
                learned_pos=False, 
                use_token=False)
  • image_size: An integer or a tuple defining the size of the input image (some code rewrite would enable any image size to be passed)
  • channels: An integer defining the umber of channels in the input image
  • patch_size: An integer or a tuple defining the size of the patches
  • num_classes: An integer representing the nuber of channels in the ouput
  • dim: An integer defining the size of the embedding dimension
  • depth: An integer defining the number of transformer layers
  • heads: An integer defining the number of heads in the transformer layers
  • mlp_dim: An integer defining the size of the MLP in the transformer layers
  • learned_pos: A boolean which, if true, switches from fixed positional encoding to learned positional encodings
  • use_token: A boolean which, if true, add a CLS token in the input and output

Citation

If you find this repository useful, please consider citing it:

@article{reynaud2021vitseg,
  title={ViTSeg-https://github.com/HReynaud/ViTSeg}, 
  url={https://github.com/HReynaud/ViTSeg},  
  Author={Reynaud, Hadrien}, 
  Year={2021}
}
Owner
HReynaud
PhD Student @ Imperial College
HReynaud
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