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Elias Probst skrev: |
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> Am Sonntag, 27. Januar 2008 14:54:15 schrieb Erik: |
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> |
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>> I need to find the difference between images (like the text-file diff |
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>> command, but for RGBA images). I tried "compare A.png A.png |
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>> difference.png". This should obviously produce some kind of blank image |
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>> because A.png and A.png are the same file, but for some weird reason the |
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>> produced difference.png has recognizable content! Is there a fix for |
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>> that bug or any other image diff program that is sane? |
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>> |
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> The easiest way for doing this, is using GIMP. |
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> - Use one layer for each image |
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> - Use the 'Subtract' mode for displaying the second layer |
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> |
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Not sure how to do this. I am not a graphic artist. But I just open it |
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with "gimp a.png b.png" and press Ctrl-C in one image, switch to the |
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other and press Ctrl-V. That seems to create a second layer. Then I have |
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no idea what to do. |
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|
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A simple command would be useful. I might have to regression-test 1000 |
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images in a svn commit because some of them seem to have been modified |
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by optipng. |
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