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You can use the difference blending mode of graphics applications to get what you're asking. &nbsp;Photoshop has it, but isn't opensource... however The GIMP is - you can get it from <a href="http://www.gimp.org" rel="ugc">www.gimp.org</a><br />
You might also find this document about GIMP's blending modes usefull: <a href="http://gimp-savvy.com/BOOK/index.html?node55.html" rel="ugc">http://gimp-savvy.com/BOOK/index.html?node55.html</a><br />

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You can use the difference blending mode of graphics applications to get what you're asking.  Photoshop has it, but isn't opensource... however The GIMP is - you can get it from www.gimp.org [http://www.gimp.org]
You might also find this document about GIMP's blending modes usefull: http://gimp-savvy.com/BOOK/index.html?node55.html [http://gimp-savvy.com/BOOK/index.html?node55.html]


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I would like to ask for tools that can compute the differences of two images. Better to be open source. Thanks very much! Hope it is not difficult question.
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I would like to ask for tools that can compute the differences of two images. Better to be open source. Thanks very much! Hope it is not difficult question.

tools for computing the differences of two images

Websites use graphics to enhance information, assist navigation, and generally improve the user’s experience. To create those graphics, developers use any number of programs, like the Adobe Creative Suite (Photoshop and Flash have their own topics), the CorelDraw suite, Xara, Gimp, ACDSee, Serif, ULead and others.