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- Colour images are
encoded as triplets of values.
- Three common systems of encoding in video are RGB, YIQ, and
- Besides the hardware-oriented colour models (i.e., RGB, CMY,
HSB (Hue, Saturation, and Brightness, e.g., used in Photoshop) and
HLS (Hue, Lightness, and Saturation) are also commonly used.
- YIQ uses properties of the human eye to prioritize
information. Y is the black and white (luminance) image, I and Q are
the colour (chrominance) images. YUV uses similar idea.
- CCIR 601 is a standard for digital video that specifies image
size, and decimates the chrominance images (for 4:2:2 video).