Image Compression A collection of simple routines for image compression using different techniques. 圖象壓縮的不同方法 BTCODE: Image compression Using Block Truncation Coding. PYRAMID: Image compression based on Gaussian Pyramids. DCTCOMPR: Image compression based on Discrete Cosine Transform. IMCOMPR: Image compression based on Singular Value Decomposition. The given codes can be also used in 2D noise suppression. Notes: The function "conv2fft" performs a 2D FFT-based convolution. Type "help conv2fft" on Matlab command window for more informations.
標(biāo)簽： Compression compression collection different
上傳時間： 2016-05-11
上傳用戶：磊子226
S60-programming-a-tutorial-guide-symbian. 1 Introduction to Mobile-Phone Systems 1 1.1 Wireless Technologies 1 1.2 Cellular Systems 2 1.3 Elements of a Mobile-Phone System 4 1.4 Keeping Users’ Calls Separate 5 1.5 Multipath Propagation 7 1.6 2G Mobile-Phone Systems 9 1.7 GPRS Systems 10 1.8 3G Mobile-Phone Systems 13 1.9 IP Multimedia Subsystem 16 1.10 Mobile-Phone Hardware 17 2 Introduction to Symbian OS 19 Introduction 19 2.1 The Development of Symbian OS 20 2.2 Symbian OS User Interfaces 21 2.3 Coding Idioms 23 2.4 Tool Chains 28 3 The Console Application 33 Introduction 33 3.1 Creating a Console Application 33 3.2 CBase Classes 38 3.3 Protecting Memory 38 3.4 Putting It Into Practice: An Engine for a Simple Card Game 46 Summary 56
標(biāo)簽： programming-a-tutorial-guide-symb Introduction Mobile-Phone Wireless
上傳時間： 2016-05-14
上傳用戶：dianxin61
CodezBank is just a small application that stores source code snippets organized in a hierarhichal maner with basic search ability. You just copy and paste the code snippet into or from this application via clipboard. If you have a bag of coding tricks then you want to keep them in this app.
標(biāo)簽： hierarhichal application CodezBank organized
上傳時間： 2014-01-06
上傳用戶：change0329
The control uses javascript to handle number formatting as you keep typing and does the validation as well. For one of our requirement, we needed a javascript based control that did formatting as the users kept typing. Google search only yielded script that did formatting on focus change events only. So I went about creating a new control myself.
標(biāo)簽： javascript formatting validation control
上傳時間： 2016-05-15
上傳用戶：lingzhichao
I ve written some many years ago dynamic Huffman algorithm to compress and decompress data. It is mainly targeted to data with some symbols occuring more often than the rest (e.g. having some data file consisted of 3 different symbols and their total number of occurence in that file s1(1000), s2(200), s3(30) so the total length of file is 1000+200+30=1230 bytes, it will be encoded assigning one bit to s1 and 2 bits to s2, s3 so the encoded length will be 1*1000+2*(200+30)=1460 bits=182 bytes). In the best case the file consisted of just one symbol will be encoded with compression ratio as 1:8. Huffman coding is used in image compression, however in JPEG2000 arithmetic codec is imployed.
標(biāo)簽： decompress algorithm compress Huffman
上傳時間： 2016-05-16
上傳用戶：aysyzxzm
數(shù)字圖像處理基礎(chǔ)理論，英文資料Restoration and Enhancement Space Pictures (blurred, noisy, distorted) Computerized Tomography Coding Transmission – Teleconferencing Storage – Land SAT Images Pattern Recognition Blood Cell Analysis Remote Sensing Robotic Vision Computer Graphics Flight Simulation Auto Body Design Special Effect in Movie
標(biāo)簽： 數(shù)字圖像處理
上傳時間： 2014-06-30
上傳用戶：plsee
misra (The Motor Industry Software Reliability Association 汽車工業(yè)軟件可靠性聯(lián)會) 是位于英國的一個跨國汽車工業(yè)協(xié)會，其成員包括了大部分歐美汽車生產(chǎn)商。其核心使命是為汽車工業(yè)提供服務(wù)和協(xié)助，幫助廠方開發(fā)安全的、高可靠性的嵌入式軟件。這個組織最出名的成果是所謂的misra C Coding Standard，這一標(biāo)準(zhǔn)中包括了127條C語言編碼標(biāo)準(zhǔn)，通常認(rèn)為，如果能夠完全遵守這些標(biāo)準(zhǔn)，則你的C代碼是易讀、可靠、可移植和易于維護(hù)的。最近很多嵌入式開發(fā)者都以misra C來衡量自己的編碼風(fēng)格，比如著名的uC/OS-II就得意地宣稱自己99％遵守misra標(biāo)準(zhǔn)。
標(biāo)簽： Association Reliability Industry Software
上傳時間： 2013-12-22
上傳用戶：yuanyuan123
本論文主要介紹了JPEG的編碼和解碼過程。該程序的編碼部分能把一張BMP格式的圖象進(jìn)行JEPG編碼，壓縮成以二進(jìn)制形式保存的文件；通過相應(yīng)的解碼程序又可以把圖象解壓縮出來。在圖象傳送過程中，我們經(jīng)常采用JPEG格式對靜態(tài)圖象進(jìn)行編碼。JPEG基本系統(tǒng)是一種有損編碼，無法完全恢復(fù)出原圖象，信息有一定的丟失，稱為有損壓縮。盡管我們希望能夠無損壓縮，但是通常有損壓縮的壓縮比(即原圖象占的字節(jié)數(shù)與壓縮后圖象占的字節(jié)數(shù)之比，壓縮比越大，說明壓縮效率越高)比無損壓縮的高。JPEG編碼先把圖象色彩RBG變成亮度Y和色度Cr、Cb，它利用人的視覺對色度不敏感的特點(diǎn)，減少一部分色度數(shù)據(jù)，以達(dá)到壓縮。 JPEG采取多種編碼方式，包含有行程編碼(Run Length Coding)和哈夫曼(Huffman)編碼，有很高的壓縮比。在編碼前，先對數(shù)據(jù)進(jìn)行分塊，離散余弦變換（DCT）及量化，保留能量大的低頻信號，丟棄高頻信號以達(dá)到壓縮。解碼時，進(jìn)行熵解碼，反量化，反離散余弦變換（IDCT）。
上傳時間： 2013-12-21
上傳用戶：coeus
1）I：初始化（Initialization）。從終端讀入電文，寫到tobetrans文件中，統(tǒng)計(jì)電文的字符集合和對應(yīng)的權(quán)值集合，建立哈夫曼樹，并將哈夫曼樹存于文件hfmtree中。 （2）C：編碼（Coding ）。利用已建好的哈夫曼樹（如不在內(nèi)存，則從文件hfmtree中讀入），對文件tobetrans中的正文進(jìn)行編碼，然后將結(jié)果存入文件codefile中。 （3）D：譯碼（Decoding）。利用已建好的哈夫曼樹將文件codefile中的代碼進(jìn)行譯碼，結(jié)果存入文件textfile中。 （4）P：印代碼文件（Print）。將文件codefile以緊湊格式顯示在終端上，每行50個代碼。同時將此字符形式的編碼文件寫入文件codeprint中。 （5）T：印哈夫曼樹（Tree printing）。將已在內(nèi)存中的哈夫曼樹以直觀的方式（樹或凹入表形式）顯示在終端上，同時將此字符形式的哈夫曼樹寫入文件treeprint中。 用戶界面要求設(shè)計(jì)為“菜單”方式。 修改你的系統(tǒng)，實(shí)現(xiàn)對你的系統(tǒng)的源程序的編碼和譯碼（主要是將行尾符編/譯碼問題）。實(shí)現(xiàn)各個轉(zhuǎn)換操作的源/目標(biāo)文件，均由用戶在選擇此操作時指定。
標(biāo)簽： Initialization 初始化
上傳時間： 2014-01-04
上傳用戶：windwolf2000
The main file in this list of programs is "vblast.m". Type "help vblast" on the command line for details.Study the coding by stepping through the program. These programs require around 5000 packets for reasonable plotting accuracy.This has been implemented for a 2x2 system. The reader can program other variations. The program has been tested on MATLAB version 6.0 and above with signal processing toolbox and communication toolbox options.
標(biāo)簽： vblast programs command main
上傳時間： 2016-08-24
上傳用戶：wcl168881111111
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