TDA4VM: About AWB plugin of DCC

wang zhili

Part Number: TDA4VM

Hello,

When I use DCC to calibrate the AWB and modify the "tuning radius", the Cb-Cr plot scheme does not change, and the plots of interpolated references and measured references are not normal, as shown in below:

And there are no changes in the image after I update AWB calibration and tuning parameters to the camera (AR0820).

over 3 years ago

0 Mayank Mangla over 3 years ago

TI__Mastermind 24525 points

The results do not look correct. Please find attached the results from TI's tuning of AR0820 sensor.

It could be an issue of wrong procedure or wrong calibration images.

0 wang zhili over 3 years ago in reply to Mayank Mangla

Intellectual 885 points

I did the calibration of AWB according to "AWB plugin guide.pdf" in DCC 2.03, do the reference raw images have to be taken in linear mode? And it works in wdr mode?

0 Mayank Mangla over 3 years ago in reply to wang zhili

TI__Mastermind 24525 points

WDR mode is supported, but the tool internally linearizes the images before calibration. For this you will need to specify sensor's PWL kneepoints.

Regards,

Mayank

0 wang zhili over 3 years ago in reply to Mayank Mangla

Intellectual 885 points

Okay, I get it. When I save raw images under diffferent color temperature of light box, is there a requirement for illuminance? Do they need to be under the same illumination?

0 Mayank Mangla over 3 years ago in reply to wang zhili

TI__Mastermind 24525 points

Illumination intensity can be different, just make sure images are not over-exposed.

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TDA4VM: About AWB plugin of DCC