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[RaiMan <question688961@xxxxxxxxxxxxxxxxxxxxx>]

Question #688961 on Sikuli changed:
https://answers.launchpad.net/sikuli/+question/688961

RaiMan posted a new comment:
If you refer to the SikuliX source code in findChanges:

be aware:
      Imgproc.cvtColor(findInput.getBase(), previousGray, toGray);
      Imgproc.cvtColor(findInput.getTarget(), nextGray, toGray);
      Core.absdiff(previousGray, nextGray, mDiffAbs);
      Imgproc.threshold(mDiffAbs, mDiffTresh, PIXEL_DIFF_THRESHOLD, 0.0, Imgproc.THRESH_TOZERO);

... mDiffAbs and hence mDiffTresh is grey (only one layer)

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