搜索资源列表
jpeg
- C代码完成jpeg编码和解码,包括dct,量化,zigzag以及霍夫曼编码、解码
saomiao
- 简单易懂的之子形扫描程序,用于mpeg压缩编码中的之字形扫描。采用循环结构,逻辑思路清晰。-Easy to understand, son-shaped scanner used to mpeg compression in the zigzag scan. Cyclic structure, logic, clear thinking.
threshold_coding
- threshold coding, forward DCT, inversedct, motion compensation, run length coding , zigzag coding etc.,
itu-t81[1]
- Implementation of JPEG compression algorithm with JFIF header being appended.This project involves writting code for following steps : Chroma subsampling,partitioning ,level shifting,DCT,quantization,zigzag scanning(involves DC differential coding &
DCT
- ce code permet de cacluler les coefficiants de la dct dans un block 8*8 aisni selectionner les coefficients par un balyage zigzag
Zigzag
- zigzag函数的matlab实现,通常图象压缩中经常需要用的ZIGZAG函数-the zigzag function realized by matlab
Huffman-coding-image-compression
- 使用哈夫曼编码对图像进行压缩,使用zigzag扫描,显示压缩后图像-Huffman coding image compression, using the zigzag scanning, image compression
zigzag.pdf
- matlab DCT zigzag function
DCTJPEG
- blkproc.m,DCHuffmanEncoding.m,ACHuffmanEncoding.m,zigzag.m,PSNR.m, 对灰度图像进行DCT变换,量化,ZigZag扫描,Huffman编解码,反量化,反DCT变换而重建图像。 其中,blkproc.m为分块DCT变换函数; DCHuffmanEncoding.m,ACHuffmanEncoding.m分别为DC和AC变换系数的Huffman码表函数; zigzag.m为ZigZag扫描函数;PSNR.m为求图
JPEG
- 实现图像的JPEG压缩和解压,包含DCT、Zigzag、Huffman等算法。-Implement JPEG image compression and decompression, including the DCT, Zigzag, Huffman algorithm.
code
- 针对灰度图像的编码和解码程序,包括分块,DCT,量化和zigzag扫描过程,内附测试图集。-For grayscale image encoding and decoding procedures, block, DCT, quantization and zigzag scanning process includes, enclosing test portfolio.
Jsteg
- Jsteg算法实现,Jsteg是一种基于JPEG的常用信息隐藏算法步骤如下: 首先,把掩体图像分为不重叠的8*8的子块,对每一子块进行DCT并对变换得到的DCT系数进行量化 其次,将待隐藏的信息进行加密,将加密结果嵌入到量化后值不为0,1或-1的DCT系数的最 低有效位(LSB)中,其嵌入顺序是按zigzag扫描顺序进行的。最后,用JPEG的嫡编码(包括哈夫曼编码,游程编码及DPCM)对嵌入秘密信息后的每一子块进行编码,从而得到一个含有秘密信息的JPEG stego文件。-Jsteg
JPEG
- C++ based JPEG on grayscale image DCT -> Quantization -> ZigZag -> DPCM, Runlength,-> Entropy Coding
