delta-sigma

computes coocurrence matrix for image processing

This is a test code to show the spectrum of sine wave.

the ESPRIT DOA estimation program

说明：  用QR分解来解方程AX=b，其中QR分解是用householder变换做的(With QR decomposition to solve the equation AX = b, where QR decomposition is done using householder transformation)

This code applies local histogram equalization on an input image with a view to improve its contrast ratio. The image is read, converted to grayscale and resized with the inbuilt function of MATLAB. The window size may be changed, however, the window shift is pixel by pixel. The output is definitely a better contrast image as compared to the input but checkerboard effect is evident.

This paper describes two digital implementations of a new mathematical transform, namely, the second generation curvelet transform [12, 10] in two and three dimensions. The first digital transformation is based on unequally-spaced fast Fourier transforms (USFFT) while the second is based on the wrapping of specially selected Fourier samples. The two implementations essentially differ by the choice of spatial grid used to translate curvelets at each scale and angle. Both digitaltransformations return a table of digital curvelet coefficients indexed by a scale parameter, anorientation parameter, and a spatial location parameter. And both implementations are fast in the sense that they run in O(n2 log n) flops for n by n Cartesian arrays in addition, they are also invertible, with rapid inversion algorithms of about the same complexity.

用matlab实现从原始视频中提取关键帧，并且自动生成新视频，新视频只由关键帧组成从而实现视频总结。(Using matlab realize extracted from the original video key frame, and automatically generate a new video, new video key frame composed by only enabling the video summary.)

三维混沌分岔图matlab源代码(Three dimensional chaotic bifurcation diagram matlab source code)

用ＭＡＴＬＡＢ实现的关于ＢＣＨ编码的程序原代码(MATLAB BCH code on the program source code)

讲解最常用的matlab算法，用自己深刻的体会加以整理(Matlab explain the most commonly used algorithms, deep understanding of their own to organize)