基于像素分割的亚像素圆模板算法

计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (16): 50-52.

基于像素分割的亚像素圆模板算法

陈良^1,2，高成敏^1,2

1.广东警官学院计算机系，广州 510232
2.华南理工大学计算机科学与工程学院，广州 510640

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-01 发布日期:2007-06-01
通讯作者: 陈良

Sub-pixel circle template algorithm based on pixel segmentation

CHEN Liang^1,2，GAO Cheng-min^1,2

1.Guangdong Police Officers College，Guangzhou 510232，China
2.South China University of Technology，Guangzhou 510640，China

Received:1900-01-01 Revised:1900-01-01 Online:2007-06-01 Published:2007-06-01
Contact: CHEN Liang

摘要/Abstract

摘要： 为提高旋转图像的质量和性能，提出了一种亚像素圆模板算法。在假设图像是连续的前提下进行逆向旋转变换;通过像素网格状分割选取亚像素圆模板的圆心;用亚像素圆模板（直径等于像素边长）进行离散化。邻域像素被圆模板覆盖的面积与圆面积的比值Rs，相应像素的颜色值Cs，旋转后像素的颜色值等于Rs和Cs的卷积。实验表明该算法图像旋转效果好于最近邻点插值和高斯模板算法，连续性接近双线性插值，计算性能明显高于双线性插值和高斯模板。

Abstract: In order to improve the image quality and performance of rotation，a sub-pixel circle template algorithm is proposed.Suppose the image is continue，rotate it inversely;Choose the center of sub-pixel circle template by dividing the center pixel into mesh;Cover the image with discrete circle template which diameter equals the edge of pixel.Rotated pixel color equals the convolution Rs and Cs.Rs are ratios of the pixels areas covered by circle and the circle area，and Cs are the corresponding pixels colors.Experiments show that the image quality rotated by the proposed algorithm is better than that of nearest neighborhood interpolation and Gaussian template algorithm，its continuity near that of bilinear interpolation，its performance is higher than that of bilinear interpolation and Gaussian template algorithm.

陈良^1,2，高成敏^1,2. 基于像素分割的亚像素圆模板算法[J]. 计算机工程与应用, 2007, 43(16): 50-52.

CHEN Liang^1,2，GAO Cheng-min^1,2. Sub-pixel circle template algorithm based on pixel segmentation[J]. Computer Engineering and Applications, 2007, 43(16): 50-52.