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Signal Processing

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    $\begingroup$ Do a high pass filter $\endgroup$ Commented May 3, 2014 at 16:48
  • $\begingroup$ @Aaron, I've given the high-pass filtering a try and it seems quite promising. Would you want to write an answer that gives some details as to why this works? $\endgroup$ Commented May 5, 2014 at 23:11
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    $\begingroup$ Another thing you might want to try a different color space besides RGB. You could use HSV and then only apply the gaussian filter trick to the V channel. $\endgroup$ Commented May 5, 2014 at 23:59