作业一

输出一个具有一定大小的双三角形，该三角形中间最小(Output of a certain size with a double triangle, the triangle between the minimum)

连续小波变换寻找脊线，用在信号处理、图像处理等方面（MATLAB）(Continuous wavelet transform for ridge line（MATLAB）)

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)

用 双 线 性 插 值 法 实 现 图 像 缩 放(Using bilinear interpolation for image zooming)

LSB视频水印程序(输入字符+弹出框),MATLAB视线视频水印的添加和提取(LSB video watermarking process (input character+ pop-up box))

说明：  用于rtd2660方案OSD内字体生成，可以做开机LOGO，无信号界面等(It is used for font generation in OSD of rtd2660 scheme, and can be used for power on logo, signal free interface, etc)

python实现人脸识别，通过pca进行降维然后使用SVM算法进行分类(Python realizes face recognition, dimensionality reduction through pca and classification by SVM algorithm)

说明：  matlab编写的直线检测算法，能够有效的提取出直线。和matlab自带的hough变换实现的同样的功能(matlab prepared in a straight line detection algorithm can effectively extract the straight line. And the hough transform matlab own to achieve the same function)

说明：  破解halcon17.12的dll x86,x64文件(Cracking DLL x86, x64 files of Halcon 17.12)

说明：  包括如何将几百个*.txt的文件读入程序，并通过快速傅立叶变换进行数据处理画出图像。(including how to hundreds*. txt file into the process, and through the fast Fourier transform data processing paint images.)