New loss functions and models

The following list of losses and models have been newly added for this release:

Loss functions

• Cross entropy

• Dice

• Hybrid loss between cross entropy and dice loss

• Focal loss

• Hybrid loss between focal loss and dice loss

Models

• AlexNet for 2D/3D images on image classification with/without (fixed input size) multiple instance learning (MIL)

• DenseNet 121, DenseNet169, DenseNet 201 for 2D/3D Classification

• Res-UNet for 3D segmentation

• UNet for 2D/3D segmentation

• AHNet for 2D/3D segmentation