SAA8112HL Datasheet, PDF (11/40 Pages) NXP Semiconductors – Digital camera signal processor and microcontroller

Philips Semiconductors
Digital camera signal processor and
microcontroller
Product specification
SAA8112HL
8.3 Colour extractor
The SAA8112HL colour extractor (denoted as RGB
SEPARATION in Fig.1) can be programmed to work with
both mosaic (yellow, magenta, green and cyan) and RGB
Bayer colour sensors.
With mosaic sensors, a combination (either sum or
subtraction) of consecutive pixels is used to extract a Y,
(2R-G) and (2B-G) triplet for all pixels.
With RGB Bayer sensors, an RGB triplet is interpolated for
every pixel on a 3 × 3 neighbourhood matrix.
With B and W sensors, the colour extractor can be
disabled, thus maintaining the full sensor resolution.
Edges and video level information (white clip) are
extracted at this stage (see Fig.3).
handbook, full pagewidth
CCD inputs
LINE
MEMORY
LINE
MEMORY
10
RGB
COLOUR
SEPARATION
FCE340
R
G
B
White clip
Edges
Fig.3 RGB separation diagram.
2000 Jan 18
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