| 摘要 |
PURPOSE:To obtain simplified constitution by detecting coincidence with a registered fingerprint by detecting only the arrangement of a minutiae and the one in the neighborhood of the minutiae by using image data obtained by performing linear scan. CONSTITUTION:An image input control part 12 checks the temporal gradation change of a picture element at a prescribed position in an image fetched at need after an identification number is inputted from an input part 19 to make access a minutiae list, and detects a fingerprint placing position, and also, automatically extracts a fingerprint image when the gradation value of the picture element exceeds a threshold value. A multivalue two-dimensional quantization image obtained in such way is stored in image memory 13. A collation processing part 18 stores the minutiae list in working memory 17. The collation processing part 18 accurately conforms a light-and-shade fingerprint image 30 stored in the image memory 13 to the minutiae in the minutiae list accessed from a file 21. |
