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Question on DM6446 CFA coefficient

Bell Hsu12438
Prodigy 100 points

I can't find document related to the meaning of the CFA coefficients. From the sample code, it looks like there are 576 values feeded in the CFA, but what are their meaning? I am working on Bayer Pattern sensor, what should I set in?

  • 0
    TI__Mastermind 37340 points

    Please note that CFA coefficients have been programmed to support Bayer Patter sensors already; CFA was designed to be configurable to possibly support other non-bayer pattern formats; however, it was decided that we could only support Bayer Pattern CFA interpolation at this time as described in our data-sheet.  Therefore, our drivers program the CFA coefficients specifically for Bayer Pattern support and there should be no need for you to change these coefficients.

    FYI, the following App Note describes which hardware blocks need to be customized (sensor-dependant) and which do not (sensor independant).  In section 3.4 you should see that CFA does not need to be customized for specific sensors, so long as they are Bayer Pattern sensors, which is what our data-sheets claim is supported by DM6446.

    [edit] adding link to App Note: http://focus.ti.com/lit/an/spraak8a/spraak8a.pdf

     

  • 0 in reply to Juan Gonzales
    Prodigy 100 points

    Hello Juan,

        I was just curious of those numbers set in the CFA table. But as you said, the CFA coefficients from sample code works well.

    Thank you

    Bell

     

  • 0 in reply to Juan Gonzales
    Prodigy 20 points

    Hi Juan,

    we are working with Bayer pattern sensors.

    Could you please share with us how the coefficients in CFA are used for generating full color RGB image.