PVarray

This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. (This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. )

cfft256程序，很好用的，通信必备的matlab程序(cfft256 procedures, the good, the necessary communication procedures Matlab)

用matlab做的有关边缘检测的一个代码，该代码可以进行多种的边缘检测(Using matlab to do the edge detection of a code that can be a variety of edge detection of)

说明：  matlab 7.5 电子教案 ppt 全集(ppt)

IWO算法在国内还没有被广泛应用，这个算法采用matlab编写~(The IWO algorithm in the country have not been widely applied, this algorithm using matlab prepared to)

induction motor calculations

FISTA 压缩感知的图像使用快速迭代shrinkage-thresholding算法(小波sparsifying转换 傅氏域抽样磁共振成像和氡转换断层测量)( FISTA compression perception of image using fast iterative shrinkage- thresholding algorithm (magnetic resonance imaging (fmri) wavelet sparsifying transform fourier-domain sampling and measuring radon transform fault) )

设计IIR数字陷波器，采样率为6.4kHz，陷波频率点为50Hz、150Hz、250Hz；c1.mat为输入数据文件；并且包括陷波前后的频谱分析。(Design of IIR digital notch filter, sampling rate of 6.4kHz, notch frequency point of 50Hz, 150Hz, 250Hz c1.mat for input data files and includes the notch before and after the spectrum analysis.)

说明：  find all bases of digraph

matlab code for image