Patent ID: 8464323
Filing Date: 2013-06-11
Classification: G06K

Abstract:
1. An authentication apparatus comprising: a first calculating unit that calculates line information for each region obtained by dividing image data whose feature value extracted from a shape of a line is used for authentication; a first correction unit that performs a correction on line information indicating the shape of a line contained in a region by using the shape of a local line indicated by line information contained in a neighboring region of the region; a second correction unit that performs a correction on line information same as line information on which the first correction unit performs the correction, by using the shape of a global line indicated by line information contained in a region larger than the neighboring region; a second calculating unit that calculates a difference between line information corrected by the first correction unit and line information corrected by the second correction unit; and an output unit that compares the difference calculated by the second calculating unit with a threshold and, when the difference is less than the threshold, outputs, as line information contained in the image data, line information corrected by the first correction unit and, when the difference is greater than the threshold, outputs, as line information contained in the image data, line information corrected by the second correction unit.