Technique for bit-accurate film grain simulation

Technique for bit-accurate film grain simulation

  • CN 1,868,215 B
  • Filed: 10/12/2004
  • Issued: 10/03/2012
  • Est. Priority Date: 10/14/2003
  • Status: Active Grant
First Claim
Patent Images

1. the method for the film grain of an image block that is used for simulating M * N pixel, wherein N and M are the integers greater than 0, this method may further comprise the steps:

  • The mean value of the pixel value in the piece of M * N pixel of calculating;

    As the mean value of said image block and the function of random number, from the pond of piece previous foundation, that comprise film grain, select the film grain blocks of M * N pixel;

    AndEach pixel in the selected film grain blocks is mixed with the respective pixel in the image block.

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