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From: | Paul Schneider |
Subject: | Re: [Openexr-devel] Photoshop Plug-In Source posted to CVS |
Date: | Fri, 16 May 2003 10:55:10 -0700 |
It just has the simple exposure and gamma controls that you find in EXRViewer. It also produces 16-bit integers, not 8-bit. Of course, the current version of Photoshop isn't very useful in 16-bit mode, but the hope is that for most images, 16-bit integer pixels will give you enough room to do what you need. If you need to paint, and you're willing to throw away data, once the 16-bit ints are in Photoshop, you should be able to do whatever tricky levels adjustment or log encoding you deem best for downsampling to 8 bits.
It's also hoped that this code will serve as good reference for those wishing to provide EXR support for other packages. It also demonstrates how to use the CodeWarrior and Visual Studio projects that were posted awhile ago, which might be helpful.
I forgot to mention that the source comes with html documentation describing how to use the plug-in, which is aimed at end users and will be available on openexr.com once we get our network issues straightened out. This doc tries to make it clear that you will lose data if you bring an image into Photoshop, and offers some suggestions for minimizing the loss. It's far from foolproof, but we're hoping that this tool finds its way into the hands of folks who understand how to make use of it despite its limitations. I'm also hoping that things like this will convince Adobe to beef up Photoshop's 16-bit capabilities, to be honest.
- Paul On Friday, May 16, 2003, at 09:44 AM, Charles Henrich wrote:
How does it handle conversion from float to 8 bit int?I've posted the source for a Photoshop File Format plug-in that reads andwrites OpenEXRs to the CVS tree. It's in a module called "Photoshop".We're having trouble with Savannah's site, so we haven't made the built plug-ins available for download yet, but I'd appreciate it if a few of you would grab this, try to build it, and let me know how it goes. There are afew serious limitations with this plug-in; the most glaring is that itdoesn't work with sequences correctly in After Effects. If anyone would like to volunteer to fix this up, or make an AEIO based on this code, get intouch with me.Charles Henrich address@hiddenhttp://www.sigbus.com/~henrich
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