Does SENet need to expand the number of channels on the input?

[tanjia123456]

Hello, thank you for your contribution. I don't quite understand a few points.
Input. shape = (1,10242,6)

1. Do I need to extend the input to 4 dimensions?
   (1,10242,6)----->(1,1,10242,6)
2. Do I need to expand the number of channels?
   (1,10242,6)----->(1,1,10242,128)
3. What should the ratio parameter value be? Does the number of channels need to be divisible by ratio?
   if ratio=16 128/16=8

[tanjia123456]

@hujie-frank @GangSunLion @kambarakun @lishen-shirley