TDA4VH-Q1: AWB Calibration graphs of reference all gray levels

Kuei lin Chu

Other Parts Discussed in Thread: TDA4VH

Hi TI Experts,

We not sure the graphics generated after AWB calibration are correct,which is based on j784s4-evm-08_06_00_14、J721e_evm and DCC tool TDA4VH v3.0. Our image sensor is IMX390

Whether the graphs of reference all gray levels must overlap is correct. If the lines do not overlap, is it abnormal?

We provide Project as attachment, thank you

over 2 years ago

0 Gang Hua over 2 years ago

TI__Guru 59250 points

It does not look correct to me.

Please check your input of black level and companding knee points.

0 Kuei lin Chu over 2 years ago in reply to Gang Hua

Prodigy 50 points

Hi TI Experts,

black level -240, companding Knee point and AWB calibration resoult

We provide Project as attachment,

May I ask what other settings need to be confirmed before AWB calibration can be done?

Thank you

black level -2402570.IMX_390_0517.rar

+1 Gang Hua over 2 years ago in reply to Kuei lin Chu

TI__Guru 59250 points

Hi Kueil,

The decompanding knee points do not look correct to me.
You will have to use the right ones in the sensor driver.

0 Kuei lin Chu over 2 years ago in reply to Gang Hua

Prodigy 50 points

Hi Gang,

In imx390_wdr_config.h have description of PWL decompanding knee points, how to convert it into a knee points format for DCC Tool AWB calibration

This sensor driver is TI code base imx390_wdr mode sensor driver setting, We believe he is correct, otherwise it would not be put on the code based