VX6854LC datasheet(92/114 Pages) STMICROELECTRONICS

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EDoF control

VX6854LC

92/114

DocID027110 Rev 2

10.5

EDoF and white balance

The EDoF reconstruction engine requires the white balance gains to be programmed by the

HOST (by I2C writes) to the color feedback register (0x0B8E to 0x0B95) of the sensor.

These gains are also used for the sensor adaptive lens shading correction if enabled. The

gains must be written to the sensor every time that the white balance gains change.

The white balance gains are required in both estimation and application modes.

The four HOST white balance gains to be programmed are listed in Table 67.

Table 67. Color feedback registers [0x0B8C - 0x0B95]

Index

Byte

Data type Default Type

Comment

0x0B8E Hi

host_WB_stats_green_red

16UR

01.00

White balance gains to

be applied by the host.

These are used by the

EDOF and the adaptive

AV to estimate the color

temperature of the

scene.

0x0B8F Lo

0x0B90 Hi

host_WB_stats_red

16UR

01.00

0x0B91 Lo

0x0B92 Hi

host_WB_stats_blue

16UR

01.00

0x0B93 Lo

0x0B94 Hi

host_WB_stats_green_blue

16UR

01.00

0x0B95 Lo

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