I'm having trouble reproducing. Which OIIO version?
> On Oct 3, 2016, at 11:40 AM, Eric Tabellion <[email protected]> > wrote: > > Hi, > > I'm trying to convert grayscale (half) float linear .exr images into 8-bit > sRGB render-ready .tx files, while using dithering in the process with > --dither. > > When the input image is 3-channel color data the conversion works fine. > However when the image is single channel, --dither seems to choke up a > garbled image. Converting the image from 3-channel down to single channel at > the same time as using --dither won't work either. > > For example either of these two commands below will produce garbled images > using RGBA inputs: > > oiiotool input.exr --ch "R" --dither --colorconvert linear sRGB -d uint8 -o > output.tif > > maketx input.exr --nchannels 1 --dither --colorconvert linear sRGB -d uint8 > --oiio --compression zip -o output.tx > > I'm trying to get this all done in one maketx pass, but so far the only way I > got this to work is doing this: > > oiiotool input.exr --dither --colorconvert linear sRGB -d uint8 -o tmp.tif > maketx tmp.tif --nchannels 1 --oiio --compression zip -o output.tx > > This doesn't work though if the input image is already single-channel. Anyone > else can reproduce this ? Could this be a --dither bug when dithering single > channel images? > > Thanks! > Eric > > -- > --------------------------------------------------------------- > Eric Tabellion [email protected] <mailto:[email protected]> > R&D Staff (650)-562-9146 > PDI/Dreamworks > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org -- Larry Gritz [email protected]
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