Patent ID: 7720263

Claim:
A collation system for collating a registered image representing a part of the human body to be authenticated with a comparative image comprising: a position indexing portion provided as an index for positioning the part of the human body in an imaging space at image pickup means; distance detecting means for detecting a distance between the part of the human body positioned in the imaging space and the image pickup means; angle detecting means for detecting an angle made by a first straight line and a second straight line, the first straight line extending from the position indexing portion to the image pickup means, and the second straight line extending from the position indexing portion to the part of the human body, using distance determined by distance direction means and a distance between the image pickup means and the position indexing portion; and removing means for removing distortion of the registered image or the comparative image according to a difference between the angle determined by the angle detecting means and an angle corresponding to the registered image.