A NEW APPROACH FOR HIGHLY ACCURATE DETECTION OF IMAGE ROTATION(International Workshop on Advanced Image Technology 2006)

概要

論文の詳細を見る
This paper describes a new approach for detecting image rotation angles with a high accuracy. Frequency amplitude distributions of input and reference images are transformed to the polar coordinate expression and then the position shift between the polar spectra is detected. In the shift detection, weights depending on the frequency and the amplitude at each frequency are used to precisely calculate the shift. In experiments, four types of synthetic and real image patterns were used as reference images. The average and standard deviation of absolute errors for the mode where synthetic reference images are synthetically rotated are 0.007 and 0.004 degrees, respectively. Those for other modes where real images are rotated synthetically or with a mechanical stage are within 0.004 and 0.002 degrees, respectively. Noises were added to the images to estimate the robustness to image noise. With the exception of images containing a single low-frequency component, errors hardly depend on the noises.
社団法人電子情報通信学会の論文
2006-01-02