METHOD AND DEVICE FOR EVALUATING LEFT IMAGE SUCH AS FOOTPRINT USING RIDGELET TRANSFORM

PROBLEM TO BE SOLVED: To provide a method and a device for evaluating a left image such as footprints by which personal authentication in criminal investigation is effectively performed by performing Ridgelet transform of the left image. SOLUTION: In the Ridgelet transform, an edge on a straight line is effectively expressed, noise is effectively removed, magnification, reduction, parallel translation and rotation are easily performed in a transformation domain by nature of Radon transform for performing linear integration of a luminance value. Furthermore, a Radon domain is reproduced while raising resolution of a footprint image subjected to the Ridgelet transform stepwise and pattern matching is allowed by Hough transformation since the Radon transform is equal to a parameter space of the Hough transformation. The luminance value is differentiated in the arbitrary direction and applied to general Hough transformation by using the Ridgelet transform. COPYRIGHT: (C)2007,JPO&INPIT