Description: 基于DCT的图像压缩算法的研究图像压缩的必要性-DCT-based image compression algorithm of the need for image compression Platform: |
Size: 86876 |
Author:陈兵 |
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Description: 总结分析现有的题目相关图像压缩算法；对现有的主要图像压缩关键算法进行仿真实现，给出各种算法的优缺点和适用范围；选定本毕业设计采用方案，编出基于DCT变换的图像压缩仿真设计程序-analysis of topics related to the existing image compression algorithm; of the existing main key image compression algorithm simulation realized, given the advantages and disadvantages of each method and the scope of application; selected the design of the use of the program graduation, came up with DCT-based image compression simulation design process Platform: |
Size: 652296 |
Author:陈兵 |
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Description: 本文结合DCT变换的特性，利用分形的Peano一hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵，不直接作二维DCT变换，而是先进行扫描，使之重排成一维向量，再进行一维DCT变换，这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法，并在扫描编码过程中，按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”，而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking effect" but we can speed up the coding speed. Platform: |
Size: 5011456 |
Author:lzy |
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Description: 基于DCT的图像压缩算法的研究图像压缩的必要性-DCT-based image compression algorithm of the need for image compression Platform: |
Size: 87040 |
Author:陈兵 |
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Description: 总结分析现有的题目相关图像压缩算法；对现有的主要图像压缩关键算法进行仿真实现，给出各种算法的优缺点和适用范围；选定本毕业设计采用方案，编出基于DCT变换的图像压缩仿真设计程序-analysis of topics related to the existing image compression algorithm; of the existing main key image compression algorithm simulation realized, given the advantages and disadvantages of each method and the scope of application; selected the design of the use of the program graduation, came up with DCT-based image compression simulation design process Platform: |
Size: 652288 |
Author:陈兵 |
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Description: 用于电视编码，解码，比较各种图像压缩算法的优缺点，给出基于DCT变换的图像压缩软件程序-for video encoding, decoding, compare various image compression algorithm advantages and disadvantages DCT is based on the image compression software Platform: |
Size: 4495360 |
Author:陈兵 |
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Description: golomb编码，用于无损图像压缩等，基于quartusii平台。-golomb coding for lossless image compression, based on the platform quartusii. Platform: |
Size: 151552 |
Author:Tangyao |
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Description: 已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由此分析直流和低频系数的重要性。
-Known brightness of two different image data block is as follows: (1) Principles of analysis of DCT, the DCT method, program and calculate the corresponding DCT coefficient, analysis of distribution coefficients. (2) quantitative analysis based on visual characteristics of the distribution of long-form features step-by-step to complete the DCT coefficient quantization. (3) the use of Z-scan output data to achieve statistical encoding, the formation of Video stream. (4) the use of the reconstructed image brightness IDCT data to calculate the SAD size, analysis of the causes of errors and the use of DCT for the principle of data compression. () (5), respectively, a factor of 1,3,6 using the upper left corner of the reconstruction of images, calculating the corresponding SAD, and the resulting analysis of DC and the importance of low-frequency coefficients. Platform: |
Size: 1024 |
Author:张元 |
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Description: 这是一个基于DCT的图像JPEG压缩程序，并将压缩码保存在一TXT文本中-This is a DCT-based JPEG image compression process, and code stored in a compressed text in TXT Platform: |
Size: 59392 |
Author:yang |
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Description: 基于DCT变换的图像压缩，分别给出了灰度图和真彩图的压缩方法。-DCT-based image compression, respectively, are given grayscale and true color pictures of the compression method. Platform: |
Size: 1024 |
Author:秦关 |
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Description: 基于FPGA的图像压缩算法程序，自己写的，可以参考一下-FPGA-based image compression algorithm, write your own, you can refer to Platform: |
Size: 2048 |
Author:YF |
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Description: 基于DCT的图像压缩的简单例子，方便新手学习。(DCT based image compression simple example, easy for beginners to learn.) Platform: |
Size: 240640 |
Author:郑景仁
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