Abstract: In order to enhance image scaling quality, this paper proposes a self-adaptive image scaling algorithm. When pixel point of original image is in the edge area, the interpretation is carried adaptively along the edge direction obtained by Sobel operator. For the non-edge area, it uses bilinear interpolation algorithm. Experimental result shows that Sobel operator can get the edge characteristics efficiently, and this algorithm can get high-quality scaled images with lower complexity.

Key words: image scaling, Sobel operator, edge detection

摘要： 为了提高图像的缩放质量，提出一种自适应图像缩放算法。当原图像像素点处于边缘区域时，沿Sobel算子确定的边缘方向进行自适应插值，当原图像像素点处于非边缘区域时，采用双线性插值法进行插值。实验结果表明，Sobel算子可有效获得图像边缘特性，该算法能通过较低的运算复杂度获得较好的图像缩放质量。

关键词: 图像缩放, Sobel算子, 边缘检测

CLC Number: 

• TP301.6