Wednesday, June 19, 2013

Evaluating an Application's Video Color

Evaluating an Application's Video Color
Both AV Foundation and QTKit automatically apply color management to video during playback. See Technical Note TN2227 Video Color Management in AV Foundation and QTKit, which is considered a prerequisite for this document.
As discussed in Technical Note TN2227, ColorSync creates a color transform that provides a perceptual match between a known broadcast video color space (as specified by the 'nclc' tag) and the specific chromaticity and gamma characteristics of your display (as defined by the display's ICC profile). This color transformation is then applied to every pixel of each frame by the GPU in realtime as the video is played back on screen.

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