Re^2: Using Perl and the GIMP to compare images

Lee

That probably would work.

My boss said what he used to do was to just do a bit by bit compare.

However, I am going to piggyback on to the evolutionary trend evinced by the commercial software test packages and try to do an XORish transform between the current page and an older version of it.

Also, I read somewhere recently that Flash is an open format. Since the element I am looking for is in Flash, I am going to see I can (find what I need in Perl to) read the text from Flash.

Thanks for your suggestion

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Re^3: Using Perl and the GIMP to compare images by shotgunefx (Parson) on Feb 07, 2006 at 13:16 UTC
This might be of help. Didn't find it on CPAN the first time around. In the Imager distro, Imager::Filters Image Difference You can create a new image that is the difference between 2 other images. my $diff = $img->difference(other=>$other_img); For each pixel in $img that is different to the pixel in $other_img, the pixel from $other_img is given, otherwise the pixel is transparent black. This can be used for debugging image differences ("Where are they different?"), and for optimizing animated GIFs. -Lee perl digital dash (in progress)	[reply]

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Re^3: Using Perl and the GIMP to compare images
by shotgunefx (Parson) on Feb 07, 2006 at 13:16 UTC

Imager::Filters

Image Difference

You can create a new image that is the difference between 2 other images.

  my $diff = $img->difference(other=>$other_img);

For each pixel in $img that is different to the pixel 
in $other_img, the pixel from $other_img is given, 
otherwise the pixel is transparent black.

This can be used for debugging image differences 
("Where are they different?"), and for optimizing 
animated GIFs.

-Lee

perl digital dash (in progress)

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