图像的四叉树平面编码
QUAD TREE PLANE SURFACE APPROXIMATION METHOD FOR IMAGE CODING
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摘要: 该文提出了一种平面逼近图像编码方法及其四叉树实现方案。在最小二乘方准则下,对于给定的图像子块,找到一个最佳平面,并用其上的点逼近图像的像点。于是,只需要对该平面的三个描述参数进行编码,编码质量和图像子块的平坦程度和大小有关,因此,可按照对编码质量的要求,以四叉树结构选择可变大小的图像子块。Abstract: A plane surface approximation method for image coding and its quad tree scheme are presented in this paper. For a given image block, an optimal plane is found under the min-imum square error criteria, and the pixels of the block are approximated by the corresponding points on the plane. As a result, only three description parameters of the plane are needed to. be encoded. The coding quality is related to the smoothness and the size of the block. Therefore, variable block size can be chosen with a quad tree structure based on the quality requirement.
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