Image encoding based on judgement on prediction error

Details Image encoding based on judgement on prediction error Image encoding based on judgement on prediction error

2008-01-01

2008-01-01

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

C382S238000, C382S236000, C375S240120, C341S051000

Reissue Patent

active

09827925

ABSTRACT:
There is provided an imagedelete-start id="DEL-S-00001" date="20080101" ?encodedelete-end id="DEL-S-00001" ?insert-start id="INS-S-00001" date="20080101" ?encodinginsert-end id="INS-S-00001" ?apparatus which comprises a generation means for generating a prediction error from andelete-start id="DEL-S-00002" date="20080101" ?encodedelete-end id="DEL-S-00002" ?insert-start id="INS-S-00002" date="20080101" ?encodinginsert-end id="INS-S-00002" ?target pixel value and a prediction value of thedelete-start id="DEL-S-00003" date="20080101" ?encodedelete-end id="DEL-S-00003" ?insert-start id="INS-S-00003" date="20080101" ?encodinginsert-end id="INS-S-00003" ?target pixel value, a judgment means for generating a generation frequency distribution of the prediction error to judge whether or not the generation frequency distribution is discrete and an entropydelete-start id="DEL-S-00004" date="20080101" ?encodedelete-end id="DEL-S-00004" ?insert-start id="INS-S-00004" date="20080101" ?encodinginsert-end id="INS-S-00004" ?means for changingdelete-start id="DEL-S-00005" date="20080101" ?encodedelete-end id="DEL-S-00005" ?insert-start id="INS-S-00005" date="20080101" ?encodinginsert-end id="INS-S-00005" ?data corresponding to the prediction error and performing entropy encoding on the obtaineddelete-start id="DEL-S-00006" date="20080101" ?encodedelete-end id="DEL-S-00006" ?insert-start id="INS-S-00006" date="20080101" ?encodinginsert-end id="INS-S-00006" ?data, in accordance with a judged result by the judgment means. Therefore, the encoding can be effectively performed even on suchdelete-start id="DEL-S-00007" date="20080101" ?thedelete-end id="DEL-S-00007" ?image data having the discrete pixel value as in a CG image, a limited-color image or the like.

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