【摘要】 这里主要研究并实现了一种基于整型DCT(discretecosinetransform)对图像进行无失真编码的方法。其主要原理为:先在整型FFT(fastFouriert ransforu)基础上构造可逆的DCT整型变换,经变换后的数据再用SPIHT(setpartitiioning in Hierarchical Trees)算法处理,最后进行算术编码。首先在图像变换和无失真编码等相关图像处理知识的基础上,结合前人的研究经验,对设计进行了理论推导和论证,并将其归纳为数学模型,总结出适用算法,并编程实现,结果证明该方法具有良好的压缩性能。更多还原

【Abstract】 In this paper, the authors have researched and realized a kind of scheme about image lossless coding based on integer DCT and its main ideas are as the following: firstly, design reversible integer DCT based on integer FFT; and then dealt with the DCT data by SPIHT; finally, encoded the data by Arithmetic Coding. In this paper, the authors deduct and prove its theory based on the works of other researchers and the basic knowledge of digital image processing. Then the its mathematical model is established and suitable algorithms are achieved. The calculation shows that this lossless coding system based on integer DCT is of higher compression performance.更多还原