this is a 2D Vnet model of Keras Version,The architecture of the model is the same as the original 3D Vnet, except that this is a network for 2D image segmentation (the convolution kernel becomes 2D)
stage_num
:allows you to change the stage of the network. For example, the network model in the picture is 5 stage. You can set thestage_num=6
to make the network deeper into a stage. The default parameter is 5