Ah, ok, of course I understand now. As I suspected, not enough coffee on my part.
So really the only issue was that you were doing the color space conversion as UINT8 -> UINT8 and losing bits along the way. On Oct 2, 2014, at 1:19 PM, Dave Lajoie <[email protected]> wrote: > Hello Larry, I use pow() twice in the code example I have sent you. one that > emulates the sRGB in the ramp and one that applies the ungamma the ramp prior > to apply slate / titling. in my example I wasn't using the convert() call. > > > So far I haven't changed those values, and my tools can process mov, mp4, > webm, jpg, png, tif, exr, and gamma is properly handled for all cases. ( > assuming RV handles color space and display luts correctly, which I think it > is the case ). > > Cheers > Dave. > > Dave Lajoie > R&D Director | Directeur R&D > > 5605 Avenue de Gaspé, Suite 408 | Montréal, QC H2T 2A4 > Tel (514) 360-3253 ext. 130 > > On Thu, Oct 2, 2014 at 3:34 PM, Larry Gritz <[email protected]> wrote: > What was your conclusion about the proper power to use to convert sRGB to > linear? > > > > On Oct 2, 2014, at 4:50 AM, Dave Lajoie <[email protected]> > wrote: > >> Converting the UINT8 ImageBuf Instance to FLOAT, prior to apply pow() solved >> the problem. >> >> srcBuf.read( 0, 0, True, OpenImageIO.FLOAT ) >> >> Thanks >> Dave. >> >> >> >> On Wed, Oct 1, 2014 at 3:01 PM, Dave Lajoie >> <[email protected]> wrote: >> Thanks Larry, much appreciated! >> >> I will keep you posted. >> >> > > -- > Larry Gritz > [email protected] > > > > > _______________________________________________ > 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 -- Larry Gritz [email protected]
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