Method of reducing a blocking artifact when coding moving picture
View Patent ↗A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S 0 , S 1 , and S 2 , which are centered around a block boundary. If a default mode is selected then frequency information of the surroundings of the block boundary is obtained. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary. The frequency domain adjustment is then applied to a spatial domain. Or, a DC offset mode can be selected to reduce blocking artifacts in smooth regions where there is little motion.
1. A computer-implemented method comprising:
obtaining, from image data and by a coding system, blocks that each include multiple pixels, a first pixel of a first block being separated from a second pixel of a neighboring second block by a block boundary;
determining, by the coding system, whether to adjust the image data corresponding to the first and second pixels based on comparing quantization information to a threshold; and
modifying, by the coding system, the image data corresponding to the first and second pixels when the quantization information exceeds the threshold.
2. A device comprising a blocking artifact reducer configured to:
obtain, from image data and by a coding system, blocks that each include multiple pixels, a first pixel of a first block being separated from a second pixel of a neighboring second block by a block boundary;
determine, by the coding system, whether to adjust the image data corresponding to the first and second pixels based on comparing quantization information to a threshold; and
modify, by the coding system, the image data corresponding to the first and second pixels when the quantization information exceeds the threshold.
3. The computer-implemented method of claim 1 , wherein modifying the image data comprises processing the image data by a processor of the coding system.
4. The computer-implemented method of claim 1 , wherein modifying the image data comprises modifying the image data for output on a display.
5. The device of claim 2 , wherein the blocking artifact reducer is configured to modify the image data by processing the image data by a processor of the coding system.
6. The device of claim 2 , wherein the blocking artifact reducer is configured to modify the image data for output on a display.