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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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FIR_BP_SK
FIT FILTER DESIGN in Matlab - Bandstop Filter(FIT FILTER DESIGN in Matlab- Bandstop Filter)
- 2009-11-01 21:50:13下载
- 积分：1
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StablePoint
说明： 关于数值分析的matlab代码，十分有用(On the numerical analysis matlab code, very useful)
- 2010-04-16 16:59:02下载
- 积分：1
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transrail
城市轨道交通客流需求预测模型，非集计思路(Urban rail transport passenger demand forecasting model, non-collection design ideas)
- 2011-07-14 16:15:38下载
- 积分：1
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Untitled
设有一个随机信号 服从AR(4)过程，它是一宽带过程，参数如下：
我们通过观测方程 来测量该信号， 是方差为1的高斯白噪声，用LMS算法和RLS算法通过观测方程来估计原信号。并用Matlab对此问题进行仿真。
(There is a random signal obedience AR (4) process, which is a broadband process parameters are as follows: We are measured by observing the signal equation is a Gaussian white noise variance, with the LMS algorithm and RLS algorithm to estimate the observation equation the original signal. This issue with Matlab simulation.)
- 2020-11-19 22:09:37下载
- 积分：1
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hurst
说明： 利用重标极差法计算Hurst指数，里面包含实现这一操作的子程序(Calcultate the Hurst)
- 2011-03-22 20:35:25下载
- 积分：1
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matlab
matlab 图像数字水印 各种源代码(matlab source code for a variety of image watermarking)
- 2010-05-08 19:11:54下载
- 积分：1
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cwp_su_all_43R1
地震信号处理的各种代码，包含SU等的程序，对要写这方面程序的有很大用处(Various seismic signal processing code, write this regard the program very useful)
- 2012-08-28 20:45:21下载
- 积分：1
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houghcircle
在一张有圆形的图片中利用matlab软件采用hough变换检测圆形，(In a picture using a round using hough transform matlab software testing round,)
- 2013-11-16 00:35:37下载
- 积分：1
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OFDM
用MATLAB对OFDM系统进行了仿真分析。包括信道调制方式16QAM、快速傅立叶变换、循环前后缀及信道函数窗函数等，最后计算了系统的误码率，毕设资料，非常珍贵。( MATLAB OFDM system for the simulation. the simulation uses OFDM each function module, Including 16 channel modulation QAM, Fast Fourier Transform, revolving around prefix and channel Function window function, etc. Finally, Calculate BER for OFDM system)
- 2013-12-04 16:44:11下载
- 积分：1
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