摘要： 针对图像缩放后产生的图像畸形与拉伸问题，提出一种基于Sobel算子和均匀插值的非线性缩放算法。通过图像能量区分出图像强势区域和弱势区域，在保护强势区域的同时，对弱势区域进行非线性均匀插值缩放。实验结果表明，该算法可解决图像缩放时主体区域产生的畸变问题，保证边缘区域的平稳过渡。

关键词: 非线性缩放, 图像梯度, 均匀插值, 强势区域, 弱势区域

Abstract: To solve the image defects and image stretching generated by image scaling, a non-linear scaling algorithm based on Sobel operator and uniform interpolation is proposed in this paper. It uses gradient energy to distinguish the strong regions and the weak regions. Non-linear uniform interpolation scaling algorithm is used in weak regions, while it preserves those strong regions. Experimental results show that the algorithm can solve the problem of the main parts distortion generated by image scaling, and ensure a smooth transition between the region edges.

Key words: non-linear scaling, image gradient, uniform interpolation, strong region, weak region

中图分类号: 

• TP391