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How to validate high pass filtered images with original image?

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I want to compare my original image with the high pass filtered image.Here I want to validate the high pass filtered image using a measurement.Can you suggest any specific method to validate it?
As an example how to identify illumination removal of an image after high pass filtering?

Answers (1)

Bjorn Gustavsson
Bjorn Gustavsson on 23 Jan 2019
Well "validate" a high-pass filtered image to the original image is a slightly confusing concept to me - by high-pass filtering you make a signifficant change to your image. Why not start with something simple:
Then you can "validate" visually - perhaps good enough, ought to be for image processing objectives, you do this type of filtering "for the eye"...
Bjorn Gustavsson
Bjorn Gustavsson on 23 Jan 2019
Well, then go ask your supervisor what he means with validate - you clearly don't know, we others guess around. I've coughed up a couple of suggestions. The thing here is that, and this is explicit and concious repetition, homomorphic high-pass filtering is something you do "for the eye", and it is best to the "validation" (whatever that means) by displaying the images, their differences, and a couple of different transformed images (fft-spectrum, histogram equalized...) and see what happens.
HTH - hope this helps

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