TDA4VM: The problem of image space partition in CCM matrix debugging

chenzhe

Part Number: TDA4VM

Dear TI Expert,

If the image space of CCM is configured as 0-2300 color temperature: 2300-3800 color temperature: 3801-5000 color temperature: 5001-6500 6501-N for debugging, how do we allocate raw images corresponding to color temperature? Do I give the first gear to 2300 RAW and the second gear to 3800 RAW? Is it feasible to use the same Raw for the last two gears?

over 3 years ago

0 Gang Hua over 3 years ago

TI__Guru 59600 points

Yes, you can partition according to your calibration lights: 0 < CCT1 < CCT2 < CCT3 < CCT4 < infinity

1	Use image at CCT1	0 ~ CCT1 - d1, where d1 = (CCT2 - CCT1) / 2
2	Use image at CCT1	CCT1 - d1 ~ CCT1 + d1, where d1 = (CCT2 - CCT1) / 2
3	Use image at CCT2	CCT1 + d1 ~ CCT2 + d2, where d1 = (CCT2 - CCT1) / 2, d2 = (CCT3 - CCT2) / 2
4	Use image at CCT3	CCT2 + d2 ~ CCT3 + d3, where d2 = (CCT3 - CCT2) / 2, d3 = (CCT4 - CCT3) / 2
5	Use image at CCT4	CCT3 + d3 ~ CCT4 + d3, where d3 = (CCT4 - CCT3) / 2
6	Use image at CCT4	CCT4 + d3 ~ , where d3 = (CCT4 - CCT3) / 2

0 chenzhe over 3 years ago in reply to Gang Hua

Prodigy 190 points

谢谢你的回答，这可以解决我的问题，也想同步问，这种配置方法，在每个色温之间会插值处理吗？还是只是到达下一个色温区间并直接应用相关的CCM矩阵？除CC外，该图像空间还出现在边缘增强（EE）和NSF4等模块中，应用判别参数为GAIN。这些模块的配置方法以GAIN为间隔，是否与CCM的色温区间配置方法一致？

+1 Gang Hua over 3 years ago in reply to chenzhe

TI__Guru 59600 points

Interpolation is done separately at run-time (not by tuning tool) and is only supported for CCM in PSDK.

For EE/NSF4 in your case, parameters are switched from one region to another.

BTW, please click on "this resolved my issue" button if it does so that others having the same questions may benefit.

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TDA4VM: The problem of image space partition in CCM matrix debugging