hessian_frangi_filter_version2a

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)

对两幅RGB图像提取模糊颜色直方图进行比较，直接运行colortest就可得出结果 (RGB images of the two fuzzy color histogram to compare directly the results can be run colortest)

说明：  在Matlab下，使用二元树复小波进行图像检索(Texture retrieval using DT CWT)

在matlab中的分形图像放大程序；对初学者很有用哦！(In the matlab source code to raise the image resolution is indeed very useful!)

可以实现在matlab中画箭头的功能，只要给定起始点(this program can plot arrow,using the start and end point)

matlab彩色图像任意旋转的函数 黑白图像旋转后需要补点(matlab color images of arbitrary spin rotation function of black and white images make up points after)

计算机图形学，扫描线种子填充算法,填充算法，填充算法(dd )

对深度图像进行滤波、渲染和着色，更加可视化(depth image visualition and filtering for coming 3D reconstruction)

说明：  一个简单的小程序，主要是转换测量卡尔曼滤波（CMKF）在三维空间上的matlab实现，并给出了xyz三个方向上的滤波误差(A simple program is mainly the realization of CMKF in three-dimensional space by MATLAB, and the filtering errors in three directions of XYZ are given)

说明：  图像边缘检测及图像区域分割、目标检测、目标识别(Image edge detection, image region segmentation, target detection and target recognition)