PixArt Imaging Inc.
PAS005B
CMOS Image Sensor IC
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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Fig 4.3.2
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PixArt Imaging Inc.
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