--pdiff is a bit too aggressive since it can hide noise, which isn't always good when you want to make sure one image doesn't have more objectionable noise than another. For now I want something a bit simpler. So we could use the RGB->XYZ->LAB conversions already in imagebufalgo_yee.cpp and then use one of the differencing metrics I linked to on those LAB colors.
On Mon, Aug 4, 2014 at 7:38 PM, Mark Boorer <[email protected]> wrote: > Hi Thiago, > > Have you tried using the perceptual difference option ("-pdiff") to > oiiotool? Or was your comment more of a request to include this particular > differencing algorithm? > > I think the "-pdiff" option was added to oiiotool a little later, but > older versions of the idiff utility (which also comes with OpenImageIO) > should be able to do a perceptual difference with the "-p" option. > > Cheers, > Mark > > Cheers, > Mark > > > On Tue, Aug 5, 2014 at 1:53 AM, Thiago Ize <[email protected]> wrote: > >> Has anyone ever looked into having oiiotool compute a more accurate color >> difference (https://en.wikipedia.org/wiki/Color_difference)? For >> instance, the CIEDE2000. This could help when comparing two images where >> you only want the diff to fail when the two images are perceptually >> different. In other words, if my eyes can't see the difference, I don't >> want to be informed of a failure. >> >> Right now, I can get two pixels with the same error difference and yet >> one pixel will clearly look different between the two images while with the >> other pixel I can't see a single difference on my monitor. This means I >> either have to set my fail thresholds really low and accept getting a bunch >> of images for which I can't tell the difference, or I set the thresholds >> higher, but risk being uninformed of visible image differences. >> >> Thiago >> >> _______________________________________________ >> Oiio-dev mailing list >> [email protected] >> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >> >> > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org > >
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