7.3.1

基于二维直方图最大熵阈值法的图像分割算法，可选取较好的阈值实现图像分割(failed to translate)

这是我们非线性课程的一次作业，有分岔图，蛛网图，庞加莱截面，希望对大家有用。(This is our first non-linear operation of the curriculum, there is bifurcation diagram, spider diagram, Poincare section, in the hope that useful to everyone.)

说明：  基于LSB的数字水印算法及MATLAB实现 黄仿元 基于LSB的数字水印算法及MATLAB实现_黄仿元(Lsb-based digital watermarking algorithm and MATLAB implementation _ yellow imitation element)

影像内定向程序编写，便于实习航摄影像的内定向(Orientation within the image programming, easy to practice within the aviation photography as directed)

电压跌落是最严重的动态电能质量问题之一， 精确定位电压跌落起止时间是应对电压跌落问题的 重要前提和基础。由于电压采样信号往往有噪声分 量，现有的方法在定位电压跌落的起止时间时存在 局限性。本文提出利用多小波变换及相邻系数去噪 的电压跌落定位方法。多小波兼有对称性、正交性、 有限支撑性和二阶消失矩等优异的信号处理性能， 利用GHM多小波可以准确定位电压跌落起止时间。 多小波变换系数在每层之间具有对应关系，多小波 相邻系数将紧相邻的若干个系数作为一个整体来确 定阈值，考虑了系数之间的相关性，能获得更好的 去噪效果。通过 Matlab 进行仿真验证，仿真结果表 明，所提出的方法的正确性。 (Voltage sag is one of the most serious dynamic power quality problems. Critical start-time and end-time are important indices for voltage sags. But the sampling signals often have noisy component, the locations of start-time and end-time are hard to get. Wavelet is an effective tool for those non-stationary signal processing and has been used in this field. Local feature in the signal can be enlarged after the transformation using the scalar wavelet. But scalar wavelets cannot contain orthogonality, symmetry, compact support and higher order of vanishing moments simultaneously. In this thesis, multi-wavelets GHM is used to detect and locate power quality disturbances. Multi-wavelets offer many excellent properties such as the same approximation order but more compact support. The dependence of the multi-wavelets coefficients varies with the level, so neighboring coefficien)

稀疏低秩去噪的MATLAB代码，包括OMP算法与KSVD算法(Sparse low rank denoising MATLAB codes, including OMP algorithm and KSVD algorithm)

说明：  用flash手绘小人头像,简单清晰,可以用来制作个人头像.完全原创(Hand-painted villain with the flash head, simple and clear, can be used to create personal avatar. Completely original)

说明：  体素化程序，主要用于matlab体素化一些封闭模型(Voxelization program, mainly used in MATLAB voxelization of some closed models)

本程序是基2的时间抽取FFT变换，可以将信号从时域转换到频域。(This procedure is the base 2 time extraction FFT transform, can transform the signal from time domain to frequency domain.)

本人图像处理的期末课程作业，使用模式识别自动识别验证码。老师都给好评哦(I end image processing course work, the use of pattern recognition automatic identification code)