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Mikhail Ivanov
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Image::Compare::THRESHOLD - Compare two images by by a maximum per-pixel color difference of their pixels.


See the docs for Image::Compare for details on how to use this module. Further documentation is meant for those modifying or subclassing this comparator. See the documentation in Image::Compare::Comparator for general information about making your own comparator subclasses.



Initializes the return value.

accumulate(\@pixel1, \@pixel2, $x, $y)

This method is called for each pixel in the two images to be compared. If the two pixels' colors are within the threshold in color difference, then the method allows processing to continue. Otherwise, this returns a false value, causing processing to cease and indicating that the two images do not match.


If this method has been called, it means that accumulate() never short-circuited and therefore none of the pixels in the two images differ by more than the threshold, so this always returns a true value.


Copyright 2008 Avi Finkel <avi@finkel.org>

This package is free software and is provided "as is" without express or implied warranty. It may be used, redistributed and/or modified under the terms of the Perl Artistic License (see http://www.perl.com/perl/misc/Artistic.html)