Patent ID: 8995730
Filing Date: 2015-03-31
Classification: G06K,G06T

Abstract:
1. An image processing apparatus comprising: a data storage section configured to store image data as a density image containing a fingerprint or a palm print and ridge pattern direction distribution data which shows a direction distribution of a ridge pattern of the fingerprint or the palm print; a direction usage image enhancing section configured to execute ridge direction usage image enhancement processing on the density image based on the ridge pattern direction distribution data; and a direction extracting section configured to extract a first direction distribution of a first pattern which is contained in a ridge direction usage image enhanced image, from the ridge direction usage image enhanced image as a result of the ridge direction usage image enhancement processing to the density image, wherein said direction usage image enhancing section executes first direction usage image enhancement processing on the density image based on first direction distribution data which shows the extracted first direction distribution, and wherein the image processing apparatus further comprises a direction correcting section configured to correct the first direction distribution data based on the ridge pattern direction distribution data to generate corrected first direction distribution data, wherein the ridge pattern direction distribution data relates a position in the density image and a ridge direction as a direction of a ridge pattern in the position, wherein the first direction distribution data relates a first position corresponding to the position in the ridge direction usage image enhanced image and a first direction as a direction of the first pattern at the first position, wherein when a difference between the ridge direction and the first direction is within a predetermined range, said direction correcting section generates the corrected first direction distribution data by replacing the first direction with an orthogonal direction to the ridge direction, and wherein the first direction usage image enhancement processing is based on the corrected first direction distribution data.