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[Vahan <1639783@xxxxxxxxxxxxxxxxxx>]

** Attachment added: "This is the difference (color and position of '40')"
   https://bugs.launchpad.net/sikuli/+bug/1639783/+attachment/4774010/+files/what_really_differs.png

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https://bugs.launchpad.net/bugs/1639783

Title:
  sikuli incorrectly matches differing images despite exact()

Status in Sikuli:
  New

Bug description:
  We are trying to use Sikulix-1.1 for automated QA. The OS is Windows 7
  professional 64bit (the java is 32-bit), we are using Jython.

  In our test, we need to verify that images match exactly. To verify
  the test works, we use a slightly modified image (in a way that is
  significant for our test), to see if sikuli will catch the problem.

  Even with find(Pattern(<image>).exact()), sikuli incorrectly assumes
  the images are matched.

  Interestingly, Matching Preview does NOT show the images to be matched
  at precision below 0.96.

  N.B. We do have Image.reset() at the start of the script, and the same
  behavior occurs when launching from the command line, so this is not
  an IDE image caching issue.

  N.B. The background is dark but not exactly black, so this isn't the
  'sikuli doesn't work correctly on black background, either', although
  that's potentially a bad one for us too.

  I've attached what we have on the screen, what we're looking for and
  what the actual difference is (shown via red rectangle on the first
  image).

  Is there a way to make it work? We are now worried that all the tests
  we write in sikuli are potentially useless as they don't detect
  differences...

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