Data processing method
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a data processing method, which data are included in an incoming digital image. This method comprises a calculation step (ACT) of a spatial activity value of a current pixel based on values (Y) of said current pixel and pixels adjacent thereto, a determination step (NND) of a non-natural uniform area (NN) if the spatial activity value of various consecutive pixels is lower than a first predetermined threshold value. The invention also includes a gradient filter step (GF) of values (Y) of the pixels adapted to detect (THR1) strong edges (SE) inside the image and a detection step (RD) of a ringing artifact. The invention finally comprises a filter step (FIL) of values (Y) of the pixels comprised in a filtering area which is located between a non-natural uniform area (NN) and a strong edge (SE) which are close together and where at least a ringing artifact has been detected.
-
Citations
8 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification