PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

4.3 Sub-sampling

4.3.1 Sub-sampling—in color mode

PAS005B can be programmed to output in VGA and CIF size. In VGA sub-sampling mode, both vertical and

horizontal pixels are sub-sampled at 1/2, while in CIF sub-sampling mode, sub-sampled at 1/4. By programming

row frequency(rf), column frequency(cf) and color mode(cm), PAS005B performs sub-sampling. The maximum

sub-sampling rate is 1/8. As shown in Fig. 4.3, by setting cm=1, rf=01 and cf=01, PAS005B outputs in VGA sub-

sampling mode.

**In color mode PAS005B outputs in Bayer pattern while mono mode outputs mono data.

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Fig 4.3.1

4.3.2

Sub-sampling—in mono mode

PAS005B can also be programmed to output in VGA and CIF size in mono mode. In VGA sub-sampling mode,

both vertical and horizontal pixels are sub-sampled at 1/2, while in CIF sub-sampling mode sub-sampled at 1/4.

By programming row frequency(rf), column frequency(cf) and color mode(cm), PAS005B performs sub-

sampling. The maximum sub-sampling rate is 1/8.

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1026

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2047

Fig 4.3.2