Re: [Openexr-devel] Blender + OpenEXR

2006-03-04 Thread Joseph Goldstone
Hello Ton-- Your question is a deep one. Some things that might help in making a recommendation: (1) What do you mean by "'linear' RGB color space"? Speaking informally, if you increase by a factor of two the number of red photons being emitted, what happens to the R in your RGB? Does

[Openexr-devel] Bringing IlmAcesFile.cpp into accord with recent events

2008-08-26 Thread Joseph Goldstone
The existing IlmImf/ImfAcesFile.cpp source contains: const Chromaticities & acesChromaticities () { static const Chromaticities acesChr (V2f (0.7347, 0.2653), // red V2f (0., 1.), // green V2f (0.0001, -0.0770), // blue V

Re: [Openexr-devel] converting from standard 8 bit to Half?

2009-09-08 Thread Joseph Goldstone
I'll be impressed if anyone can answer this without asking what "normal 8 bit images" are. --joseph On Sep 8, 2009, at 12:31 PM, Paul Miller wrote: Is there a typical conversion from normal 8 bit images to half that will properly linearize the image so it looks "right" once displayed us

[Openexr-devel] OpenEXR 1.7.0 dist - can't build IlmBase (and perhaps others?) against Mac OS X 10.5 SDK

2010-09-28 Thread Joseph Goldstone
On Mac OS X 10.6.4, with the latest downloadable tarball of IlmBase (IlmBase 1.0.2), I get the blowout that others have mentioned involving -Wno-long-double. No news there. But if I edit the Makefile (here, the Makefile for Half) to take out -Wno-long-double, and specify that I want to link aga

Re: [Openexr-devel] OpenEXR files with nonlinearly encoded RGB

2015-02-21 Thread Joseph Goldstone
There’s this paragraph on page 1: At this time the committee's work is not complete, and several aspects of what is described below are not fully resolved. This document does not attempt to define a standard. The goal of this document is to encourage interested parties to experiment with CTL an

Re: [Openexr-devel] C++11, 'throw', etc.

2017-08-10 Thread Joseph Goldstone
Adobe must have updated to at lest 1.7 in the last year because they now support attribute names with lengths > 31. If it gets to where we need to ask them a question I have some email addresses from discussions we had, in getting them to that point. On Aug 10, 2017, at 3:47 PM, Deke Kincaid m