[ale] image diff utility?

[Dow Hurst]

Maybe the ImageMagick "identify" command could be a starting place.  The cmp 
will compare files but identify seems to be more appropriate.  Use the 
-verbose option for lots of info.  Maybe a Perl wrapper that used identify? 
Just guessing here,
Dow


Christopher Bergeron wrote:
> Does anyone know of any command line utilities that can compare two 
> images (jpg, pngs, whatever), and if they visually differ by a set 
> threshold they will output a true or false flag?
> 
> I've seen this done in big bloated security applications, but I'm 
> looking for a simple command line utility or method of doing something 
> like this:
> 
> if (image1.png) is more than n percent different from (image2.png), exit 
> with a true; if not, exit with a false
> 
> Heck, I don't even need to have an adjustable threshold; I just need to 
> know if 2 images are significantly different.  Does anyone have any 
> ideas on how I could accomplish this?
> 
> Thanks in advance!
> -CB
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> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale
> 

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