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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.

funç ã o que implementa o contrast strech

本文利用simulink建立了并联机构位姿正解(the forward solution model based on simulink)

小生境遗传算法，该算法易于找出优化问题的所有局部最优解和全局最优解(Niche Genetic Algorithm. The algorithm is easy to find the optimization problem in all local optimal solution and the global optimal solution)

最全的cs重构算法matlab代码及其参考文献，包括BP，COSAMP, Cotourlet, CURVELET, DWT, GPSR, Grouplet, MP, OMP, ROMP, SP, StOMP等(Contain almost all the algorithm of Compressed Sensing（CS）:COSAMP, Cotourlet, CURVELET, DWT, GPSR, Grouplet, MP, OMP, ROMP, SP, StOMP and so on)

FM调频广播simulink仿真，各参数已经设置好了，大家尽管用就好了(FM radio simulink, various parameters have been set up, though everyone use it)

STBC-ofdm程序源文件，可以供初学者学习交流使用(STBC-ofdm program source files, can be used for beginners to learn to share their)

说明：  matlab 基于形状的图像检索算法 关于七个不变矩的主要算法 中调用步骤！ ！！！！！！(matlab image retrieval algorithm based on the shape of seven invariant moments on the main algorithm, called the steps! ! ! ! ! ! !)

归一化倒谱提升窗口 预加重滤波器 语音信号分帧 计算每帧的MFCC参数 (Calculate the audio files of the MFCC factor)

这些资料都是有关数学建模所用的SPPS软件的资料，希望对大家有帮助。(These data are used for mathematical modeling of SPPS software information, we want to help.)