| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain coded data of high compression efficiency by not only suppressing the variation of a coding parameter but also increasing a probability that the coding parameter becomes a value suitable for run. <P>SOLUTION: When run-length coding an elementary pixel Xi, the run of a pixel one line preceding the elementary pixel Xi is acquired from an array variable, and the coding parameters J, K of the run including the elementary pixel is determined (step S903). Then, the run RL from the elementary pixel is counted (S905-S908). Then, the acquired coding parameter is defined as an initial parameter when coding the run RL including the elementary pixel, and the run including the elementary pixel is run-length coded while updating the coding parameter (step S911). Then, the array variable is updated by the run including the elementary pixel (step S912). <P>COPYRIGHT: (C)2009,JPO&INPIT |
