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DCT-and-Image-Compression
DCT and Image Compression
In the JPEG image compression algorithm, the input image is divided into
8-by-8 or 16-by-16 blocks, and the two-dimensional DCT is computed for each
block. The DCT coefficients are then quantized, coded, and transmitted. The
JPEG receiver (or JPEG file reader) decodes the quantized DCT coefficients,
computes the inverse two-dimensional DCT of each block, and then puts the
blocks back together into a single image. For typical images, many of the
DCT coefficients have values close to zero these coefficients can be discarded
without seriously affecting the quality of the reconstructed image.
The example code below computes the two-dimensional DCT of 8-by-8 blocks
in the input image, discards (sets to zero) all but 10 of the 64 DCT coefficients
in each block, and then reconstructs the image using the two-dimensional
inverse DCT of each block. The transform matrix computation method is used.
- 2014-01-28 16:55:07下载
- 积分：1
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kmeans
kmeans is image segmentation algorithm.
- 2014-02-06 15:27:22下载
- 积分：1
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fiber
说明： 用于求解光纤的TM模，具体信息可以查看m源文件内的说明(TM-mode fiber is used to solve the specific information you can view the description of the source file m)
- 2011-03-06 16:31:52下载
- 积分：1
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szsy
说明： 傅里叶数字水印算法实现，含有源码以及说明书(Fourier digital watermarking algorithm)
- 2010-04-16 11:18:39下载
- 积分：1
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Floyd
说明： 求解最短路问题，求解图论中任意两点间最短距离(Solving the Shortest Path Problem)
- 2020-06-17 17:40:02下载
- 积分：1
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embed
基于MATLAB环境的音频水印嵌入源程序(Environment based on MATLAB source audio watermark embedding)
- 2009-05-25 11:20:36下载
- 积分：1
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fwdofdmwithpapr
Its IEEE papers on papr reduction in OFDM
- 2011-02-15 07:04:37下载
- 积分：1
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face
一个人脸识别的程序，有测试库和样本库，用matlab语言编写的，能实现识别功能，希望对人脸识别感兴趣的有帮助(A face recognition program, have test library and sample library, matlab language preparation, and can realize identification function, hope to face recognition interested in help)
- 2011-11-08 13:06:09下载
- 积分：1
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Smith2
Smith chart support 2
- 2011-07-06 09:26:56下载
- 积分：1
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EMDs
经验模态分解程序集，一类可以有效进行信号分段以及分析和处理的源代码。(Empirical mode decomposition procedure)
- 2013-08-17 22:13:21下载
- 积分：1
