JPEG2000可逆变换算法的实现

Realization of the reversibe algorithm based on JPEG2000

对于图像压缩来说,JPEG2000压缩标准实现的最基本的元素之一是离散小波变换(DWT),可逆变换对无损压缩具有重要的意义。利用可逆变换将整数映射到整数,已确定需要用来实现变换的精度位数。我们的方法整数变换三角分解的方法,首先将进行三角基本可逆矩阵(TERM)变换,然后用矩阵分解实现多成分变换的整数可逆,JPEG2000中用整数提升的算法来最终实现可逆变换。从而实现无损压缩。

To compress to the picture, DWT is one of the most basic elements of JPEG2000 compressese standard, transfonn reversibly has important meanings in no harm compressinging. Reversible utilization may map the integer to integer. In order to eonfirme the precision of compress the method, integer varies the method that the trigonometry resolves, the basic reversible matrix （TERM） of the trigonometry transform is carried out at first. Then, the integer is realized by the matrix resolving. The integen promoting in JPEG2000 realizes reversible transform. So, it is a harmless compressing.