${\color{orange} Pytorch Implementation of U-Net, R2U-Net, Attention U-Net, Attention R2U-Net}$

U-Net: Convolutional Networks for Biomedical Image Segmentation

https://arxiv.org/abs/1505.04597

Recurrent Residual Convolutional Neural Network based on U-Net (R2U-Net) for Medical Image Segmentation

https://arxiv.org/abs/1802.06955

Attention U-Net: Learning Where to Look for the Pancreas

https://arxiv.org/abs/1804.03999

Attention R2U-Net : Just integration of two recent advanced works (R2U-Net + Attention U-Net)

U-Net

R2U-Net

Attention U-Net

Attention R2U-Net

Evaluation

we just test the models with ISIC 2018 dataset. The dataset was split into three subsets, training set, validation set, and test set, which the proportion is 70%, 10% and 20% of the whole dataset, respectively. The entire dataset contains 2594 images where 1815 images were used for training, 259 for validation and 520 for testing models.