基于圆盘特性的非线性分形图像压缩编码方法

提出了一种能够有效扩充编码字典的较简单基于圆盘特性的非线性分形图像压缩编码算法.该方法基于圆盘的旋转重叠的对称特性,将正方形内切圆中心点与其边上象素点相连,取其连线与内切圆的交点作为该象素点在圆盘上的映射点,简化了HongYan和Popescu等提出的基于圆盘特性的分形图像压缩编码方法,且逻辑简单,实现容易;实验数据表明,此方法有效的扩充了分形图像的编码字典,有较高的图像压缩比和峰值信噪比,获得了高质量的重建图像.

Disks and nonlinear fractal image compression coding algorithm

A simple and nonlinear disk algorithm is designed,which can extend image encoding dictionary efficiently.This algorithm is based upon symmetry characteristic of rotation-overlap.Methods of connecting the inscribed circle's center point with the square side's point and regarding the connecting line and the inscribed circle's point of intersection as image point are employed,which simplifies the disk algorithm designed by Hong Yan and Popescu.This algorithm is simple in logic and easy in implementation.Experimental results show that the method not only extends the encoding dictionary efficiently but also obtains high compression ratio and signal-to-noise ratio and high quality rebuilding picture as well.