| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image processor which highly accurately detects blur of a bit map image with less load. <P>SOLUTION: A CPU 160 of a printer 100 divides image data of a target window into blocks of 8×8 pixels, calculates a coefficient group representing a change in a pixel value in each block and selects from an edge pattern table 181 a basic edge pattern approximating a change shape of the coefficient group. With respect to the basic edge pattern, when adjacent blocks are in the same inclination direction as that of a target block, the CPU 160 executes edge connection processing of cumulatively adding burr widths (widths of a gradient of a change in a pixel value) of the blocks with each other, calculates a blur width of the target block and determines block burr. The CPU 160 accumulates the determination results and performs window burr determination processing. If any focused window is included in a target image, the target image is determined to be a focused image. <P>COPYRIGHT: (C)2008,JPO&INPIT |
