A mixed triangular and quadrilateral partition for fractal image coding
A mixed triangular and quadrilateral partition for fractal image coding
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DOI：
10.1109/icip.1995.537633
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发表时间：
1995-10
期刊：
影响因子：
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通讯作者：
F. Davoine;John Svensson;J. Chassery
中科院分区：
文献类型：
--
作者：
F. Davoine;John Svensson;J. Chassery
本文提出了一种新的基于三角形和四边形的分形图像分割编码方案。其目的是在对图像的自适应性（减少块效应）方面具有三角形优于正方形和矩形块的优点，并且通过将相邻三角形分组为四边形来减少块的数量。四分之一允许减少的数量的局部压缩仿射变换组成的分形变换，从而提高压缩比，同时保持解码图像的视觉质量。
This paper presents a new partitioning scheme for fractal image coding, based on triangles and quadrilaterals. The aim is to have the advantage of the triangles over the square and rectangular blocks, in terms of adaptivity to the image (reduction of the block effect), and to reduce the blocks number by grouping neighboring triangles into quadrilaterals. Quadrilaterals permit a reduction of the number of local contractive affine transformations composing the fractal transform, and thus to increase the compression ratio, while preserving the visual quality of the decoded image.