數(shù)字圖像壓縮編解碼的設(shè)計實現(xiàn)

論文編號:DZXX401  論文字?jǐn)?shù):12585,頁數(shù):37

摘要

 隨著通信技術(shù)及計算機(jī)軟硬件的高速發(fā)展，數(shù)字圖像壓縮編解碼技術(shù)的逐漸成熟，實時圖像處理在多媒體、HDTV、圖像通信等領(lǐng)域有著越來越廣泛的應(yīng)用，圖像壓縮處理技術(shù)也已成為多媒體技術(shù)的核心。文章從當(dāng)前數(shù)字圖像壓縮編解碼技術(shù)的發(fā)展趨勢，提出了Huffman編解碼在圖像壓縮處理技術(shù)方面的重要性及可行性。之后對數(shù)字圖像壓縮處理的設(shè)計進(jìn)行了詳細(xì)的描述，尤其是對Huffman編解碼給出了測試數(shù)據(jù)、綜合后的實現(xiàn)結(jié)果及在VC6.0編程環(huán)境中的調(diào)試。同時對JPEG基本模式中的主要算法，諸如顏色模式轉(zhuǎn)換及采樣，二維DCT變換，量化等也給出了基本解決方法。調(diào)試和運(yùn)行結(jié)果表明: 用Huffman編解碼來實現(xiàn)圖像的壓縮處理，達(dá)到了較高的壓縮比，在速度和資源利用率方面均達(dá)到了較優(yōu)的狀態(tài)，可滿足實時JPEG圖像編解碼的要求。
 
關(guān)鍵詞：數(shù)字圖像壓縮，Huffman，編碼，解碼

ABSTRACT

 With the rapid development of the communications technology and the computer hardware and software, digital image compression code and decode technology are gradually becoming mature. Real-time image processing in multimedia, HDTV, image communication and other fields have been in increasingly wide application, at the same time, the image compression technology has become the core of the multimedia technology. Based on the current development trends of the digital image compression code and decode technology，this article introduced the importance and the feasibility of Huffman coding and decoding in image compression technology. Then the compressions of digital images of the design are described in detail, particularly the test data for Huffman coding and decoding. Consolidated results and the achievement in the VC6.0 programming environment debugging. JPEG in the article is the basic mode of the main algorithm, Such as the change and sampling of color in the mode, the change of 2D DCT, quantitative and so on also given basic solutions. Huffman coding and decoding are entire design and its various modules are debugging and running in VC6.0 programming environment. Debugging and the results show that : Huffman code used to achieve the right JPEG and other image compression, achieve a higher compression ratio, the speed and efficiency of resource utilization are equal to the optimum state, can meet the requirements of the real-time JPEG image coding.
 
Keywords: Digital image compression, Huffman, encoding, decoding

 目錄 
 
摘要 I
ABSTRACT II
第1章 緒論 1
1.1 編解碼在數(shù)字圖像處理中的重要意義 1
1.2 課題的研究內(nèi)容 3
1.3 論文的組織結(jié)構(gòu) 3
第2章 設(shè)計工具簡介 4
第3章 Huffman編解碼的設(shè)計原理 5
3.1 Huffman編碼方法 5
3.2 Huffman編碼中要注意的問題 5
3.3 Huffman解碼方法 6
3.4 Huffman編解碼的應(yīng)用 6
第4章  數(shù)字圖像壓縮編解碼的設(shè)計實現(xiàn) 7
4.1 顏色轉(zhuǎn)換及采樣 7
4.2 DCT變換 7
4.3 量化 8
4.4 Huffman編解碼的程序?qū)崿F(xiàn) 8
4.4.1 采用 Huffman編解碼的原因 8
4.4.2 編碼、解碼的實現(xiàn) 9
4.4.2.1 程序主體框架概述 9
4.4.2.2 統(tǒng)計字符出現(xiàn)概率 9
4.4.2.3 Huffman樹的構(gòu)造 10
4.4.2.4 生成代碼表并實現(xiàn)壓縮 11
4.4.2.5 解碼 15
第5章 總結(jié) 19
致謝 21
參考文獻(xiàn) 22
附錄 程序 23