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Distored image when convert RGB into YUV. How to fix???

This is a discussion on Distored image when convert RGB into YUV. How to fix??? within the Tech Board forums, part of the Community Boards category; From .ppm image, I extracted R,G,B data and saved following structures: RGB RGB RGB RGB RGB RGB RGB.......... corresponding to ...

  1. #1
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    Distored image when convert RGB into YUV. How to fix???

    From .ppm image, I extracted R,G,B data and saved following structures:

    RGB RGB RGB RGB RGB RGB RGB..........

    corresponding to each pixel position.
    Then I used formula to convert R,G,V into Y,U,V.With each pixel, I obtained YUV correspondingly.

    R0G0B0->Y0U0V0 , R1G1B1 ->Y1U1B1, ........

    I saved data following YUV422 Data Format:The YUV422 data format shares U and V values between two pixels. As a result, these values are transmitted to the PC image buffer only once for every two pixels.

    R0G0B0R1G1B1->Y0UY1V

    a,How to calculate U and V from U0,U1 and V0,V1????????
    b,In my case , I used this formula:

    U=(U0+U1)/2; V=(V0+V1)/2;

    Obtained data was saved following structure to create .yuv file:

    YUYV YUYV YUYV YUYV YUYV YUYV......

    But when I used YUV tools to read new .yuv file, that image is not similar to original image. What did I do wrong here ????
    Last edited by ios198; 11-20-2013 at 01:33 AM.

  2. #2
    TEIAM - problem solved
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    This thread should be moved to tech board
    Salem likes this.
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