Re: Error writing cineon files?

On Thu, 2 Oct 2008, Moe Goldberg wrote:
>
> I'm using graphics magick to write cineon files and I'm not getting the
> values that I expect.
> When I write a file and then read it back, I am getting different values
> that what I wrote (or at least tried to write).

The problem is almost certainly due to the created image being in sRGB 
colorspace by default but Cineon is written in CineonLog colorspace. 
You will likely find that when the Cineon file was read back, that it 
is now in CineonLog colorspace (colorSpace () method returns 
CineonLogRGBColorspace.

If you set the image to CineonLogRGBColorspace using the colorSpace() 
method prior to saving the image, I believe that you should obtain 
similar values back.  The values may not be exactly the same since 16 
bits can't be fully preserved in 10 bit storage.

Bob
======================================
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/


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