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JPEG chrmoinance subsampling

  • 18-05-2009 12:50AM
    #1
    Beau
    Registered Users, Registered Users 2 Posts: 1,095 ✭✭✭


    Hey, I've an exam tomorrow and pretty sure this question is coming up, its how to calculate the number of bytes used to store an image using different colour models. If someone could help me it'd be great. I've looked at notes and the book and I just don't get it. The question is:


    Suppose you have an 8x8 block of pixels that you are going to
    compress using the JPEG method. They are currently
    represented as 24-bit RGB color, with eight bits per color
    component. Calculate the number of bytes necessary to store
    this image data in the RGB model and in the YUV model with
    4:2:0 chrominance subsampling. Then calculate the
    compression rate.


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