Abstract: Aiming at the problem of blur boundaries and low computational efficiency in traditional image interpolation algorithms, an image interpolation algorithm based on edge gradient is proposed. It uses Roberts edge detection operator to determine the color segmentation and interval boundary threshold, makes use of three space points to constructed plane, and gives the interpolation formula. Experimental results show that, this algorithm can protect the image details, improves image scaling quality and operation efficiency.

Key words: image interpolation, Roberts operator, bicubic algorithm, gradient, edge detection, space plane

摘要： 传统图像插值算法的计算效率较低，处理后图像存在边界模糊或锯齿的现象。为此，提出一种基于边缘梯度的图像插值算法。通过Roberts边缘检测算子确定颜色分段和区间分界阈值，利用空间三点构造空间平面，并设计插值公式。实验结果表明，该算法能有效保护图像的边缘细节，提高图像缩放质量和运算效率。

关键词: 图像插值, 罗伯特算子, 双三次算法, 梯度, 边缘检测, 空间平面

CLC Number: 

• TP391