04011957

模拟了衍射光栅的光学行为，运用matlab语言编写的程序，对科技工作者有很搭帮住(simulation of the optical diffraction grating, using the Matlab language procedures, IT workers have to take very live help)

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. )

带有白噪声的周期信号和噪声信号的自相关，数字信号处理的经典算法。(White noise with a periodic signal and noise auto-correlation signal, digital signal processing algorithm for the classic.)

应用Matlab计算边界条件，解决最优控制问题。(Matlab Boundary Conditions )

处理数据中有很好的应用，里面有验证函数，可以进行验证。(Processing data has a good application, there are validation functions, can be validated.)

emd分解程序，和hht变换程序，适合初学者，希望对大家有用。(emd decomposition process, and the hht transformation program, suitable for beginners, and hope to be useful.)

本代码提供SVD算法Matlab实现，实现SVD分解，并返回分解值。(This code provides SVD algorithm Matlab, the realization of SVD decomposition, and a return value decomposition.)

ocr image to text detection

Good book about Matlab and optics

南京大学的多类标签KNN分类器，对模式识别十分重要的作用，有着较好的分类效果，可以充分利用类别信息。(Nanjing university class label KNN classifier, the pattern recognition is an important role, has a good classification effect, can make full use of class information.)