基于区域边界的图像变形算法

基于区域边界的图像变形算法使用不同类型的区域划分图像，在区域内建立仅与该区域边界相关的扭曲函数，使区域内象素的扭曲局部化，同时又保证区域问扭曲函数的连续性，从而克服了基于特征线段、基于网格扭曲等方法的缺点。本文详细讨论了区域的划分类型和方法，给出了区域的扭曲函数，最后对复杂的人脸图像进行了实验。实验结果表明，该算法所需用户控制少，方便用户对渐变精细度的控制，运算速度快，能产生理想的平滑渐变效果。

An Image Morphing Algorithm Based on Boundaries of Region

This paper presents an image morphing algorithm based on boundaries of region. By dividing the whole image region into some sub-regions and constructing warp function in each region, the algorithm localizes the warp function and the warp functions in different regions possess continuity on the boundaries of neighboring regions. This algorithm gets rid of some disadvantages appeared in Beier and Neelys method and mesh-based method. This paper discusses the methods of region-dividing and constructs warp functions for different type of regions. By morphing a face image, the algorithm is proved to be efficient.