Getting the original Y values back from inside a core image kernel
Getting the original Y values back from inside a core image kernel
- Subject: Getting the original Y values back from inside a core image kernel
- From: Brad Wright <email@hidden>
- Date: Tue, 15 Jul 2008 12:14:17 -0700
Hi ProApps:
I have an FXPlug filter that uses a core image kernel to calculate
the original Y values in a Ycbcr color space. Using Core Video in a
separate applications, the values match the original Y values.
Inside Final Cut Pro, the values are only matching in the first and
last 10 percent or so of the video brightness range. I've tried
Gamma Correction, and all forms of compensating I can think of, but
it doesn't pull back the original Y values. What filters and working
color space is Final Cut Pro using when it converts an image from
Ycbcr into an FXTexture. I can explain the variation.
Brad Wright
DVDxDV
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