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Compare two images Bash solution needed pmkpmk msg:3214788 3:52 pm on Jan 10, 2007 (gmt 0) In order to program a watchdog-timer for a perpetual screenshot, I need to compare the image content from the command line. Even with identical content, diff and cmp report that two consecutive files are different. So I need to look at the image content itself, best with some fuzzyness.
equalm msg:3214984 5:47 pm on Jan 10, 2007 (gmt 0)
When I use "md5sum" on binaries, it works pretty well in distinguishing two files...
except on java .class files. I found that even when the code changed, sometimes the compiled .class file was the same as before.
pmkpmk msg:3215720 8:37 am on Jan 11, 2007 (gmt 0)
Yes, I tried that too, but since the images DO differ on a binary basis (though not by visual inspection) md5sum gives of course different hashes.
I found a tool called jpegdiff which can get a "fuzziness parameter". Maybe this works.