Signal_Processing

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. )

一个LDA的算法，可以实现对实现基于LDA的人脸识别(An LDA algorithm, can achieve the realization of Face Recognition Based on LDA)

绘出DSB解调器的输出并给出功率为其0.001，0.01，0.05，0.1和0.3倍的白高斯噪声存在的情况下解调器的输出(Mapped DSB demodulator output and gives power to its 0.001,0.01,0.05,0.1 and 0.3 times the white Gaussian noise exist demodulator output)

用二维离散余弦变换(DCT)进行数字水印matlab源码(two-dimensional discrete cosine transform (DCT) digital watermarking Matlab FOSS)

PSO for beginner propose to minimize f(x)=100(x2-x12)2 + (x2-1)2

logistic period doubling bifurcation

1D求解麦克斯韦方程组，等离子体密度，电子密度，matlab程序，+作图(1D solving Maxwell' s equations, the plasma density, electron density, matlab program,+ mapping)

color identification system using matlab

数组类的实现与改进。利用操作符重载，定义类来生成一数组(An array of classes and achieve improvements. Use operator overloading to generate an array of custom class)

video copy detection using content based fingerprinting