A Study of Perspective Distortion Correction by Vanishing Point Detection Using Radon Transform

－Distortion Correction for Japanese Characters－

Abstract

Correction for perspective distortions of Japanese characters on signboards is discussed. The perspective distortions is a technical issue, when we take a photo of the signboards obliquely. Two vanishing point s generated by horizontal and vertical lines on the Japanese characters these vanishing points are computed using the Radon transform. A homography matrix for our correcting is determined , and we correct the perspective distortions. We confirm our correction and its accuracy in our experiments. In a comparison with the conventional methods , our proposed method has the best performance of all.