What is the “do-nothing” convolution kernel

问题

If I am trying to do a convolution kernel in Frequency space - what is the "do-nothing" kernel. In other words, if I view the image after applying the kernel, and normalizing it in Frequency space, I just want to see the raw Fourier transform

Is it the identity matrix? my kernel is 3x3

Thanks

回答1:

A do-nothing 3x3 kernel will be:

0 0 0
0 1 0
0 0 0

I hope I understood your question correctly - I'm not sure why you would want such a kernel, when it's much easier to just skip the convolution entirely.

来源：https://stackoverflow.com/questions/5824704/what-is-the-do-nothing-convolution-kernel