Data Sheet
CMOS VGA (640 x 480) image sensor with OmniPixel3-HS™ technology
OV7675/OV7175
proprietary to OmniVision Technologies PRODUCT SPECIFICATION version 2.0
5.3 manual white balance
In manual mode, the companion backend processor can control the OV7675/OV7175 internal Red, Green and Blue gain
register values to achieve white balance. The gain is calculated by the equation below:
Gain = Register Value / 0x40
Since the gain is digital gain, always set the minimum gain of the three channels to 1x and do not apply less than 1x gain
to any channel.
5.4 gamma control
The OV7675 gamma curve is composed of approximately 16 linear segments as shown in figure 5-1 and table 5-1.
figure 5-1 gamma curve
XREF1
XREF2
XREF3
XREF15
255
GAM1
0
SLOP
GAM2
GAM3
GAM15
255
7675_DS_5_1
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