How to create a CNN layer with varying dilation filers?

vision
1

I want to create a CNN layer with filters of varying dilations.
For example, in a conv2d layer there are filters with size 55 and also dilated filters with 33 with dilation=1?
Or if I just concatenate the output feature maps from two conv2d layers, the gradient backprop will just be fine?

Thank you for any clarification.

2

Dilation is related to filter kernel, thus, you cannot set dilations-per-filter. However, you can concatenate and it will backprop properly

3

Thanks a lot! Appreciated!