结合线性变换和非线性变换的放大算法研究

Research of Magnify Method based on Linear and Nonlinear Transform

非线性放大能在保持图像上下文关联的情况下对目标进行放大·利用球面几何模型得到了一种非线性的映射关系,并通过分析得到了该映射关系在图像变换中可以得到非线性放大的效果·为了进行有效的观察,避免感兴趣区域的中心出现变形,采用结合线性和非线性变换的方法对图像进行放大·实际应用的结果表明,该算法不仅可以放大感兴趣区域,而且能有效的保持上下文的关联关系,是一种有效的图像放大算法·

Nonlinear magnify can zoom in objects with global context. A nonlinear mapping function based on spherical geometry model is used and nonlinear image magnify can be achieved by this mapping function in image transform. For better viewing and to avoid distortion in the center of the viewing area, linear transform and nonlinear transform are combined. The results verify that it is an effective way to magnify image with keeping both local detail and global context.