bgseg

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. )

讨论调和级数的变化规律。画出部分和数列 变化的折线图，观察变化规律；引入数列： 作图观察其变化，猜测是否有极限；引入数列：，作图观察其变化，寻找恰当的函数拟合；探讨调和级数的部分和数列的变化规律是什么？(Discussion to reconcile a series of changes in the law. Draw the line chart of some of the several columns change, observed changes in law the introduction of the series: mapping to observe the changes, guess whether there is a limit the introduction of the series:)

基于多目标优化进化算法。处理约束问题的改进的多目标进化算法。(Based multi-objective optimization evolutionary algorithm. Constraint problems improved multi-objective evolutionary algorithm.)

对信号的FFT变换和有随即噪声信号的FFT变换，适合初学者学习(FFT transform of the signal and then noise signal FFT transform, suitable for beginners to learn)

用matlab实现的稀疏字典学习算法，可以用于图像去噪、图像分类、图像识别等(Sparse dictionary learning algorithm implemented by Matlab can be used for image denoising, image classification, image recognition and so on.)

利用matlab的gui设计的带有输入和输出功能的界面图形，实现等距线可视性很强，自己独立编写的数据和图形，学习非常值得,实现 ga pca bp和svm压缩图像，matlab语言(Using GUI of MATLAB to design interface graphics with input and output functions, realizing the visibility of isometric line is very strong, and it is very worthwhile to study the data and graphics independently written by oneself, realizing GA PCA BP and SVM compressed image, MATLAB language)

说明：  实现协作频谱感知，采用压缩感知方法，并对不同虚警率下的正确判决概率进行对比仿真。(To achieve cooperative spectrum sensing, compressed sensing method is adopted, and the correct decision probability under different false alarm rates is compared and simulated.)

说明：  matlab svm 源代码 matlab svm 源代码 (matlab svm)

2D fdtd with pml and two sinosudoal point source

基于DCT变换的信息隐藏(数字水印)嵌入算法的设计(Matlab)(DCT transform information hiding (digital watermark) is embedded algorithm design (Matlab) based)