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  • $\begingroup$ This is what I thought would work but my Mathematica 8 didn't have the HighpassFilter and I didn't feel like figuring out how to implement it. +1. Free ImageJ also has a good Bandpass filter built in. $\endgroup$ Commented Oct 13, 2014 at 20:04
  • $\begingroup$ @s0rce I figured out how to implement a Photoshop-like HPF and it is backward-compatible with v8. Take a look. $\endgroup$ Commented Oct 13, 2014 at 20:50
  • $\begingroup$ Mr. Wizard, the result looks good and should be simple to fill and clean up. Just to understand the code, are you just generating a new image that is the difference of the original image with a blurred version of the image? So is this essentially unsharp masking without the step where you add the unsharp mask back to the original image? $\endgroup$ Commented Oct 14, 2014 at 12:37
  • $\begingroup$ @user13999 Yes, that is correct. $\endgroup$ Commented Oct 20, 2014 at 21:06