python - Keras: how to build a custom Nearest-Neighbor downsampling layer?

Question

Let's say i want to perform a non-learnable nearest neighbor downsampling on the input tensor.

nnDownSample2D(factor, inputLayer)

Specifically, I only want to keep the topleft corner

1 0 .. 0
0 0 .. 0
...
0 0 .. 0

how do i achieve this in keras?

question from:https://stackoverflow.com/questions/65645423/keras-how-to-build-a-custom-nearest-neighbor-downsampling-layer

Answer 1

Waitting for answers