I understand, that image padding is necessary in order to prevent wrap-around effects due to circular convolution. My set of questions are related to different padding schemes.
- Zero Padding is easy to visualize in the context of reducing wrap-around effects. In the case of schemes like mirror reflection, I have a doubt that since these are non-zero paddings, so doesn't this kind of padding distort the true spectral content of the image (in the sense that the relative spectral content of two frequencies getting changed ) ?
- Could someone present examples of effects due to different padding schemes (in MATLAB, mirror, symmetric and zero padding are available) and point out subtle differences arising due to different schemes and possibly pointing out their importance ?
I would be very grateful for the patience of reading this question and giving your consideration to it.