Description: 用matlab所撰寫的huffman code,裡面沒有使用matlab內建的函示,完全自己撰寫而成,使和初學者練習參考使用.-Using matlab written huffman code, which did not use the matlab built-in letter that is entirely their own written so that beginners practice and their use and reference. Platform: |
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Author:楊於 |
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Description: 霍夫曼（Huffman）编码算法是满足前缀条件的平均二进制码长最短的编码算法。本文用Matlab语言编程实现了霍夫曼（Huffman）编码,并有详细的word说明-Hoffman (Huffman) coding algorithm is to satisfy the conditions of the average prefix length the shortest binary code coding algorithm. In this paper, Matlab programming language to achieve the Hoffman (Huffman) encoding, and a detailed description of the word Platform: |
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Author:杨为 |
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Description: 信息压缩中一种常见的编码---霍夫曼编码的源程序代码-Information Compression in a common coding- Huffman coding of the source code Platform: |
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Author:吴晨光 |
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Description: 对输入的字符串各个字符出现次数的概率进行霍夫曼编码，并对其过程进行详细图形显示-Enter the string of characters appear in all probability the number of Huffman code, and a detailed graphical display process Platform: |
Size: 12288 |
Author:cindy |
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Description: 摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
-Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete Platform: |
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Author:压子 |
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Description: ) Compression using huffman code
-with a number of bits k per code word
-provide huffman table
Huffman coding is optimal for a symbol-by-symbol coding with a known input probability distribution.This technique uses a variable-length code table for encoding a source symbol. The table is derived in a particular way based on the estimated probability of occurrence for each possible value of the source symbol .Huffman coding uses a specific method for representing each symbol, resulting in a prefix code that expresses the most common characters using shorter strings of bits than those used for less common source symbols.The Huffman coding is a procedure to generate a binary code tree.
-) Compression using huffman code
-with a number of bits k per code word
-provide huffman table
Huffman coding is optimal for a symbol-by-symbol coding with a known input probability distribution.This technique uses a variable-length code table for encoding a source symbol. The table is derived in a particular way based on the estimated probability of occurrence for each possible value of the source symbol .Huffman coding uses a specific method for representing each symbol, resulting in a prefix code that expresses the most common characters using shorter strings of bits than those used for less common source symbols.The Huffman coding is a procedure to generate a binary code tree.
Platform: |
Size: 1024 |
Author:ria |
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Description: 霍夫曼编码程序 对给定的概率 生成霍夫曼编码 希望大家给点意见-Huffman encoding procedure to generate the probability of a given Huffman code to the point I hope everyone Platform: |
Size: 1024 |
Author:yang long |
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Description: 详细介绍了霍夫曼编码的源代码 用于图象的加密解密程序-Huffman code described in detail the source code for image encryption and decryption process Platform: |
Size: 2048 |
Author:bichaozhi |
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Description: 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 & AC huffman coding) & adding jfif header following the rules specified in itu-t.81. Platform: |
Size: 966656 |
Author:dwn |
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Description: 此文件实现了对256*256像素的图片进行霍夫曼编码和解码的过程-This file use Huffman coding method to code and decode any 256*256 picture, turn out the result in binary code Platform: |
Size: 2048 |
Author:alvin |
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Description: The goal of this program is to demonstrate the construction of a huffman encoding tree. The tree is represented as a binary tree using MATLAB s built in treeplot commands. Contruction of the tree as well as the huffman code book will be described in later sections. Platform: |
Size: 25600 |
Author:fefe |
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