face-tracking

c语言实现傅里叶变换，可用于各种谱分析，也可用于dsp下位机的处理(Fourier transform is implemented in C language and can be used in various spectral analysis)

C#创建动态数组，筛选指定类型的元素，使用LINQ筛选动态数组中是string类型的元素。核心代码如下： 　　ArrayList arrList = new ArrayList(); //创建动态数组 　　arrList.Add(1);//添加动态数组元素 　　arrList.Add(2); 　　arrList.Add("A"); 　　arrList.Add(3); 　　arrList.Add("b"); 　　//使用LINQ筛选动态数组中是string类型的元素 　　var query = from item in arrList.OfType() 　　 select item; 　　label1.Text = "是字符串类型的有：";//显示string类型的元素 　　foreach (var item in query) 　　{ 　　 label1.Text += item + " , "; 　　}

书籍识别系统

说明：  在线office编辑，多人同时编辑，希望大家喜欢(Online office editors, many people edit at the same time, I hope you like it.)

说明：  大致思路说说，就是在外部SRAM里面做了一个大数组[320][240]做了一帧缓冲，所有屏幕相关操作都是在这一帧上面实现的，使用DMA直接丢数据到FSMC接口上，比I/O快多了，然后就是资源的去背问题，所有的图片都是我从手机版上面截图下来的，然后背景色都是0X4DF9，然后因为jpg转换软件的关系，蓝色的背景色会有偏差所以直接判断把0x4df9不显示不可行，后来想到可以用RGB颜色来入手，虽然不是0x4df9但是还是蓝色，所以蓝色分量肯定比红色多，所以做了一个阈值判断(Roughly speaking, a large array [320] [240] is made in the external SRAM to do a frame buffer. All screen-related operations are implemented on this frame. Using DMA to drop data directly to the FSMC interface is much faster than I/O. Then it is the problem of resource backtracking. All the pictures are taken from the top of the mobile version, and then the background color is 0X4DF9. Later, because of the relationship between JPG conversion software, the blue background color will be biased, so it is not feasible to directly judge that 0x4df9 is not displayed. Later, I thought that RGB color can be used to start with. Although it is not 0x4df9, it is still blue, so the blue component must be more than red, so I made a threshold judgment, and then it is the transition between scene and scene.)

说明：  用牛顿-拉夫森法求解非线性弹簧问题，用Matlab软件制作了一个简单的程序。(Use the Newton-Raphson method to solve the nonlinear spring problem,a simple program is produced by using the Matlab software.)

一个使用MDB的名片管理程序-MDB use of a card management procedures

STM32驱动SD卡，wifi ,lcd液晶显示，很多库函数，方便使用(STM32 driver SD card, wifi, LCD display, many library functions, easy to use)

说明：  仿商品平台 最近版交易猫源码 带后台自己打件就可以(Latest trading cat source code with background)

本文通过对男性和女性声音的语音特征的研究，发现男女声的基音频率存在较大的差异，并设计了基于基音频率分析的男女声识别系统。男女声识别系统由以下三个模块电路构成：话筒放大器，低通滤波器，半波整流电路，单片机测量控制模块。话筒放大器采用NE5532P音前置芯片，对语音信号进行放大；八阶低通滤波器MAX293完成基音信号的提取；单片机STC12C5410AD实现频率测量和控制输出功能。经仿真与电路实测，男女声的识别效果良好。(In this paper, the voices of male and female voice characteristics of the findings of a study of the fundamental frequency of the sound of men and women there is a big difference, and the design of frequency analysis based on the pitch of the voice recognition system for men and women. Voice Recognition System for men and women from the circuit the following three modules: the microphone amplifier, low-pass filter, half-wave rectifier circuit, single-chip measurement control module. NE5532P sound using the microphone pre-amplifier chip amplification of voice signals eight MAX293-order low-pass filter to complete the extraction of pitch signal STC12C5410AD single-chip realization of the frequency of measurement and control output. By circuit simulation and measurement, the identification of male and female voices well.)