PROCESSOR-SDK-J721S2: How to brighten up low brightness yuv pic using DCC tuning

wang.rui48

Tool/software:

I tuned the AWB using DCC, obtained a yuv image with normal white balance, but the brightness was very low. I can only obtain normal images by manually increasing the Y channel by three times in post-processing. All other XML files are configured by default. What should I tune next to get a yuv image with normal brightness.

2 months ago

0 Sarabesh Srinivasan 2 months ago

TI__Genius 16720 points

Hello,

The assigned expert is out of office so please expect some delays.

Thank you,
Sarabesh S.

0 Gang Hua 2 months ago in reply to Sarabesh Srinivasan

TI__Guru 59380 points

Hi Sarabesh,

I am on vacation until 23rd.

wang.rui48 said:
the brightness was very low.

Brightness is dependent on sensor exposure, AE settings, and tone mapping.

Could you please provide more information?

0 wang.rui48 2 months ago in reply to Gang Hua

Prodigy 220 points

The raw image looks good to me. But the pixel vaule after decompression is too small.

How do I adjust tone mapping？When I lower gamma(GAMM value for compressing 20/24-bit WDR raw to 16-bit ISP internal), the image will become brighter. Is this the correct approach for DCC tuning?

+1 Gang Hua 1 month ago in reply to wang.rui48

TI__Guru 59380 points

Hi rui,

wang.rui48 said:
How do I adjust tone mapping？When I lower gamma(GAMM value for compressing 20/24-bit WDR raw to 16-bit ISP internal), the image will become brighter. Is this the correct approach for DCC tuning?

Yes, that is expected.

You may start with this FAQ for initial tuning and then use the tuning tool to refine as necessary.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1275034/faq-default-dcc-profile-generation-tool-for-tda4-am6xa-isp-vpac?tisearch=e2e-sitesearch&keymatch=%20user%3A35541

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PROCESSOR-SDK-J721S2: How to brighten up low brightness yuv pic using DCC tuning