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Data processing method

  • US 20020122602A1
  • Filed: 12/19/2001
  • Published: 09/05/2002
  • Est. Priority Date: 12/26/2000
  • Status: Active Grant
First Claim
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1. A method of processing data contained in a digital input image formed by pixels, said method comprising the steps of:

  • calculating (ACT) a spatial activity value of a current pixel based on values (Y) of said current pixel and of pixels adjacent thereto, determining (NND) a non-natural uniform area (NN) if the spatial activity value of various consecutive pixels is lower than a first predetermined threshold value, gradient filtering (GF) values (Y) of the pixels adapted to detect (THR1) strong edges (SE) inside the image, determining (RC) an artifact if the spatial activity value of a current pixel is higher than a second predetermined threshold value and is concentrated on said pixel, and detecting (RD) a ringing artifact if the artifact coming from the artifact determination step (RC) lies between a non-natural uniform area (NN) and a strong edge which are close together.

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