3D-SPIHT

RGB-CMYK by matlab sourcecode

MATLAB图像压缩JPEG编解码算法,多种参数对比，代码详细实现JPEG编解码标准算法(MATLAB codec JPEG image compression algorithm, multi-parameter comparison, the code in detail to achieve the standard JPEG codec algorithm)

利用奇异值分解压缩图像，内有详细的实验报告（包括编程思路、结果分析以及实验图像）(The use of singular value decomposition image compression, which has a detailed experimental report (including programming ideas, the results of analysis and experimental images))

关于压缩感知的一些代码，对初学者有很大的帮助，是一篇文献的仿真(some python code about comprehenssed sensing)

哈夫曼编码(Huffman Coding)，又称霍夫曼编码，是一种编码方式，哈夫曼编码是可变字长编码(VLC)的一种。Huffman于1952年提出一种编码方法，该方法完全依据字符出现概率来构造异字头的平均长度最短的码字，有时称之为最佳编码，一般就叫做Huffman编码(有时也称为霍夫曼编码)。(Huffman encoding (Huffman Coding), also called Huffman Coding, is a way of Coding, Huffman Coding is variable word length Coding (VLC). Huffman in 1952 put forward a kind of coding method, this method is completely based on the characters of the occurrence probability to construct the average length of the shortest code word, sometimes called the best coding, generally is called Huffman coding (sometimes referred to as the Huffman coding).)

一种改进的方案，它针对硬故障集的特点利用指示频率连续长度码(FDR码)进行二次编码压缩。该方法充分利用测试集中无关位较多而测试模式之间变化位较少的特征，应用贪心算法对预先计算的测试集进行了重新排序，尽可能的使相邻的向量间具有最少的不同位，排列成一个最佳的差分向量序列，然后应用FDR码对差分向量序列进行编码,最后对压缩结果重新分块，按照一次压缩的流程进行二次压缩。在解压时，使用片上解压电路解压，能高效地还原出原测试集。最后通过对Soc部分标准电路硬故障集的测试结果显示，本方案具有较好的压缩率。(a new improved method was proposed in the paper,the method using Frequency-Directed Run-length(FDR codes)coding for the twice aimed at hard-fault. It fully takes advantage of the characters that there are many don’t-care bits in the test set but a few different bits between the test patterns, Then it applies the greed calculate way to sort the precomputed test sets and make the close together vector have the least different sites possibly. It uses the FDR codes to coding the vectors,then blocks the results and uses the FDR codes to compress for the second time. Decompression used of on-chip circuit extract unpack,it will be deoxidize the original test efficient.using the hard-fault to compress and the experimental results prove that the improved coding method of this paper has the better compression ratios has been proved at last. )

BWT压缩方法描述，是一种被bzip2等数据压缩技术所使用的算法(The Burrows–Wheeler transform (BWT, also called block-sorting compression), is an algorithm used in data compression techniques such as bzip2.)

WinEYS压缩源码例程，程序结合易语言扩展界面支持库，调用API函数实现压缩解压功能。(WinEYS source compression routines, programs combined with easy language support library expansion interface , call the API function to achieve compression and decompression functions.)

对输入的字符进行哈弗曼编码，生成编码表，计算压缩比等(haffman tree)

JPEG2000库源代码(最新的JPEG2000标准源代码)(JPEG2000 library source code)