| 摘要 |
The present invention first detects a rectangle (with vertexes A, B, C, and D) enclosed by a pair of parallel horizontal lines that are demarcation lines between the palm pattern impression and the background in wrist-side and fingertip-side, and a pair of parallel vertical lines that are orthogonal to said horizontal lines and that are demarcation lines between the palm pattern impression and the background in thumb-side and little-finger-side. Next, the present invention splits the rectangle above into 12 segments, arranged with three segments vertically by four segments vertically, by obtaining the points, that divide the sides AB and CD into three equal parts and the points, and Y6 that divide the sides AC and BD into four equal parts, respectively. The present invention then splits said palm pattern impression into three regions, i.e., the first region being a combination of three segments horizontally by two segments vertically that are located toward the fingertip among said segments, the second region being a combination of two segments horizontally by three segments vertically that are located toward the thumb and the wrist among said segments, and the third region being a combination of two segments horizontally by three segments vertically that are located toward the little finger and the wrist among said segments.
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