Hi @M_S,

The backbone is ResNet50 pretrained on ImageNet and the samples need to be normalized as you said. You should transform the data as it is done here 94.
Yes , [0, H) and [0, W).
There are N masks of the size of the image. Binary mask means that the pixel values are 0 everywhere except where the relevant instance is, where they are 1.
UInt8Tensor is basically a boolean.

Hope this answers your questions!