| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a process and a device for analyzing a maze pattern image for extracting bits encoded into a maze pattern. <P>SOLUTION: Grid lines of the maze pattern are determined, and the directions of effective pixels of a bar are estimated and grouped into clusters. A line is estimated for the effective pixels of the selected clusters. The grid lines of the other clusters are determined. The estimated lines are trimmed according to the inclination distribution analysis and grouped according to the distance analysis, and mostly fitting lines are selected from each group. An affine parameter is determined from the mostly fitting lines. A type of corner lacking in the maze pattern is determined and a right orientation of the maze pattern is obtained. Gray level values of the related maze patterns are processed and bits are extracted from the maze pattern image. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
