关键词: 特征提取, Canny边缘检测, 距离变换, 矩形模式

Abstract: A rectangle feature extracting method is proposed.The Canny edge detecting is used to get the images’ edge for its sensitive performance on images’ texture.Then distance transform on the result of Canny edge detecting is applied，which can reduce the interference caused by the complex texture region on rectangle pattern feature extracting.By consequence，the convolution image between distance transform result and mask image is computed，then the convolution image is classified and the rectangle pattern features’ control coordinate is got.Finally the rectangles’ four vertexes coordinate through geometric constraints are solved.The method is proved to be effective and workable by experiments，and can achieve 1.3 pixels on features’ location on real images.

Key words: feature extracting, Canny edge detecting, distance transform, rectangle pattern