基于改进边缘方向判定方法的图像插值算法

为了解决图像超分辨率重建过程中传统边缘插值方法边缘方向定位不准确,以及边缘区域只沿着边缘点一侧进行插值,而没有考虑边缘内外侧的问题,提出一种基于边缘二值化图像的边缘方向判定算法。该算法通过边缘像素点之间的相互关系来确定边缘方向,得到的结果更加可靠;并且加入方差来判定插值侧边,有选择性地对边缘一侧进行插值,考虑了边缘判定的特征。实验结果表明,与传统的边缘插值方法相比,两种改进获得了更好的图像重建效果。

Image interpolation algorithm based on an improved judgment method of edge direction

In order to solve edge direction positioning is not accurate and it only interpolate in one side along the edge points without considering the edge inside and outside for the traditional edge interpolation method in the process of rebuilding the image super-resolution,a novel algorithm is proposed based on the edge of binary image to determine the edge direction.It get a more reliable results by determining the edge direction with the relationship between edge pixels,and determining the interpolation side by adding variance,taking the characteristics of determining the edges into account,interpolating on one side of the edge selectively.The experiment results show that the two kinds of improved can get better effect of image reconstruction relative to the traditional edge interpolation method.