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楼主 |
发表于 2011-8-2 11:25:58
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flicker应该是会动的,我的横线是静止的。我在想是不是跟OV3640后端输出接的芯片有无ISP功能有关?
原文是这样:2.1 back-end with ISP
If back-end chip has built-in ISP (Full ISP or YCbCr ISP), the ISP could do image scale. So
OV3640 outputs only XGA format for preview and QXGA for capture. ISP scaled XGA image to
other resolution that mobile device needed for LCD display. And the ISP scaled QXGA image to
other resolution that the mobile device needed for capture.
2.2 back-end without ISP
If back-end chip doesn't have image scale capability, then the LCD scaler of OV3640 must be
used to scale output resolution exactly the LCD size. For example, if the LCD size is 176x220, then
the LCD scaler will scale the output size to 176x220.
In this case, OV3640 output small resolution for preview, and several other resolution for
capture. The resolution for capture may include: QQVGA, QVGA, QCIF, CIF, VGA,
SVGA,SXGA,UXGA,QXGA. For best quality, all capture size are all downscaled from QXGA. |
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