Description: 用MATLAB写的JEPG格式的图像处理算法，附带有十张左右的经典图像算法常用图片，可以在同一目录下面自己做一下看效果-MATLAB write JPEG format image processing algorithm, fringe is about 10 images of the classic algorithm commonly used pictures, in the same directory can do something in their effects Platform: |
Size: 86270 |
Author:chaos545 |
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Description: 介绍了JPEG图像压缩算法,并在MATLAB 数学分析工具环境下从实验角度出发,
较为直观地探讨了DCT 在JPEG图像压缩中的应用。仿真实验表明,用MATLAB 来实现离散余弦
变换的图像压缩,具有方法简单、速度快、误差小的优点,大大提高了图像压缩的效率和精度。
李秀敏1 , 万里青1 , 周拥军2
(1. 河南科技大学电子信息工程学院,河南洛阳 471003 2. 中航一集团洛阳电光设备研究所,河南洛阳 471009)-introduced the JPEG image compression algorithm, MATLAB and mathematical analysis tool environment from experimental perspective, more directly on the DCT in JPEG image compression applications. Simulation results show that the use MATLAB to achieve discrete cosine transform image compression method is simple, fast, the advantages of a small error, which has greatly enhanced the efficiency of image compression and accuracy. LI Xiu-1, Green 1 Wanli, Zhou Yongjun 2 (1. Henan University of Science and Technology of Electronics and Information Engineering College, Luoyang, Henan 471003 2. A350 Luoyang Electro-Optic Equipment Institute, Luoyang, Henan 471009) Platform: |
Size: 109257 |
Author:adnsid |
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Description: 用MATLAB写的JEPG格式的图像处理算法，附带有十张左右的经典图像算法常用图片，可以在同一目录下面自己做一下看效果-MATLAB write JPEG format image processing algorithm, fringe is about 10 images of the classic algorithm commonly used pictures, in the same directory can do something in their effects Platform: |
Size: 86016 |
Author:chaos545 |
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Description: 介绍了JPEG图像压缩算法,并在MATLAB 数学分析工具环境下从实验角度出发,
较为直观地探讨了DCT 在JPEG图像压缩中的应用。仿真实验表明,用MATLAB 来实现离散余弦
变换的图像压缩,具有方法简单、速度快、误差小的优点,大大提高了图像压缩的效率和精度。
李秀敏1 , 万里青1 , 周拥军2
(1. 河南科技大学电子信息工程学院,河南洛阳 471003 2. 中航一集团洛阳电光设备研究所,河南洛阳 471009)-introduced the JPEG image compression algorithm, MATLAB and mathematical analysis tool environment from experimental perspective, more directly on the DCT in JPEG image compression applications. Simulation results show that the use MATLAB to achieve discrete cosine transform image compression method is simple, fast, the advantages of a small error, which has greatly enhanced the efficiency of image compression and accuracy. LI Xiu-1, Green 1 Wanli, Zhou Yongjun 2 (1. Henan University of Science and Technology of Electronics and Information Engineering College, Luoyang, Henan 471003 2. A350 Luoyang Electro-Optic Equipment Institute, Luoyang, Henan 471009) Platform: |
Size: 108544 |
Author:adnsid |
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Description: 这是lzw算法源程序代码，纯c语言编程实现，希望对您有用。-lzw algorithm source code, pure c programming language, and I hope to you useful. Platform: |
Size: 12288 |
Author:zc |
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Description: 一个简单对图象进行JPEG图像压缩算法。希望对大家有所帮助-A simple image to JPEG image compression algorithm. I hope all of you to help Platform: |
Size: 1024 |
Author:yangmengling |
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Description: 改进的JPEG-LS算法，具有运算速度快、压缩比高等优点，可用于遥感图象的压缩。-Improved JPEG-LS algorithm, with a computing speed and high compression ratio can be used in remote sensing image compression. Platform: |
Size: 135168 |
Author:吴天 |
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Description: 该程序（jpeg_quality_score）是基于matlab平台，NR中精典算法，对JPEG压缩格式的图像进行客观评价-The program (jpeg_quality_score) is based on matlab platform, NR in the classical algorithm for JPEG image compression format to conduct an objective evaluation Platform: |
Size: 2048 |
Author:jian |
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Description: 一个图像处理程序，使用DCT快速算法，只需把源码改成m文件即可。-An image processing procedures, the use of DCT fast algorithm, just the source file can be replaced by m. Platform: |
Size: 2048 |
Author:volcano |
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Description: 基于改进JPEG-LS算法的遥感图像近无损压缩专利，由航天五院508所申报，很详细的介绍了算法和fpga的实现-Improved JPEG-LS algorithm near lossless compression patent, the space the five branches of 508 reporting, a detailed explanation of the algorithm and implementation fpga Platform: |
Size: 673792 |
Author:小化 |
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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: 本文实现了在连续视频数据流中几种不同的运动检测算法，他们都是基于当前帧图像和前一帧图像的比较，程序使用了AForge.NET framework库。其中的示例代码支持下面几种视频格式：AVI文件、网路相机的JPEG和MJPEG，本地的采集设备(USB相机等)。-This article implements a continuous video data stream in several different motion detection algorithms, they are based on the current frame and previous frame image comparison, the program uses the AForge.NET framework library. Sample code which supports the following video format: AVI file, network camera JPEG and MJPEG, the local collection devices (USB cameras, etc.). Platform: |
Size: 1349632 |
Author:憨豆 |
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Description: Program to encode in JPEG algorithm. Note, this doesnot output JPEG file. but a matlab demonstration of the process how jpeg is created. Platform: |
Size: 620544 |
Author:Tanveer |
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Description: 本文所做的主要工作为：研究了JPEG2000标准的原理和基本框架，对JPEG 2000标准的核心—小波变换压缩技术进行了分析研究，概要的介绍了小波理论。对EZW算法进行了详细分析和描述，包括零树的含义、结构及其扫描方法。并应用Matlab图像处理工具箱和小波分析工具箱对图像小波变换处理，并通过接口工具Mex实现在Matlab环境下对C程序EZW编码的调用，实现了应用零树小波编码算法对图像的压缩处理，简单地实现了对JPEG 2000的仿真。-The main work that this text do is:Studied the principle and basic frames of the JPEG2000 standard, to the center of JPEG 2000- Wavelet transform compress which had been analyzed and researched .Carried on the detailed analysis and descriptions to the calculate way of EZW, include zero-tree coding, structures and it’s scans method. In Turbo C environment using C language to simulate wavelet zero-tree coding algorithm, using Matlab image processing toolbox and wavelet analysis toolbox, and using interface tool Mex to implement transferring the C program in Matlab, and implement the image compress by wavelet zero-tree transform coding methodology,and supplely implement JPEG2000. Platform: |
Size: 665600 |
Author:路敬 |
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Description: 盲水印提取时不需要参考原始载体图像,在信息隐藏、版权保护等方面具有更广泛的应用前景。提出的盲水印算法在分块离散余弦变换(DCT)和离散小波变换(DWT)的基础上,利用关系双方DCT系数和DWT系数在受到攻击时具有相同变化趋势的特点,采用关系嵌入和量化嵌入的自适应选择嵌入策略,较大幅度地提高了盲水印提取的鲁棒性。同时在量化嵌入中采用抖动调制,实现了水印透明性和鲁棒性调节的便捷性。大量仿真实验结果表明该算法对噪声干扰、低通滤波、JPEG压缩、对比度增强等攻击有很好的鲁棒性和透明性。关键词 数字水印盲水印关系嵌入量化嵌入离散余弦变换离散小波变换
按这篇文章的算法，自己编的matlab,没有攻击时水印提取率为1，加水印后图像PSNR有45+，。有攻击后提取率也有0.9+。-Blind watermark extraction can be fulfilled without referring to the original host image. Therefore it hasmuch
prospective applications in the fields of information hiding and copyright protection. Based on blocking Discrete Cosine
Transform (DCT) and blocking DiscreteWaveletTransform (DWT), the proposed blind watermarking algorithm uses an
embedding strategy of adaptively selecting either relationship embedding or quantization embedding. The relationship em-
bedding comes from the observation thatboth themagnitudes of coefficients concerned in the relationship usually have thesame change trend when the image is attacked. This strategy remarkably improves the robustness ofwatermark extraction.In addition, dithermodulation is used in quantization embedding, bywhich the tradeoff between transparency and robus-tness ofwatermarking can be easily adjusted. Simulation results show that the algorithm is fairly robust against the attacks such as noise, filtering, compression, and contrast Platform: |
Size: 758784 |
Author:CXF |
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Description: Matlab中Jepg压缩算法的实现，可以直接运行，亲测！-Matlab in Jepg compression algorithm can be run directly, pro-test! Platform: |
Size: 141312 |
Author:Scotty |
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Search - JPEG algorithm in matlab