dlib note

2018-02-25 01:24:12 +08:00
parent 4385b63c3b
commit 6360db8133
15 changed files with 613 additions and 5 deletions
@@ -0,0 +1,19 @@
+# 编译opencv程序
+
+## use g++
+``` bash
+g++ main.cpp `pkg-config opencv --cflags --libs`
+```
+
+
+## use cmake
+
+> nano CMakeLists.txt
+
+``` bash
+cmake_minimum_required(VERSION 2.8)  
+project(test)  
+find_package(OpenCV REQUIRED)  
+add_executable(main main.cpp)  
+target_link_libraries(main ${OpenCV_LIBS})  
+```
@@ -0,0 +1,119 @@
+# opencv 环境部署指南
+
+> http://blog.csdn.net/cocoaqin/article/details/78163171
+
+> http://blog.csdn.net/eds95/article/details/78870194
+
+
+## ubuntu 
+
+``` bash
+unzip opencv-3.4.0.zip
+cd opencv
+
+sudo apt install cmake
+sudo apt install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev  
+
+mkdir my_build
+cd my_build
+
+## cmake 中会下载安装一个大文件，网速会很慢
+cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
+
+sudo make
+sudo make install
+
+sudo gedit /etc/ld.so.conf.d/opencv.conf
+
+# add this
+"
+/usr/local/lib  
+"
+
+sudo ldconfig  
+
+sudo gedit /etc/bash.bashrc
+
+# add this
+"
+PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig  
+export PKG_CONFIG_PATH  
+"
+
+source /etc/bash.bashrc  
+sudo updatedb  
+
+# test
+
+cd opencv***/smaples/cpp/example_cmake
+cmake .
+make
+./opencv_example
+
+# and you will see yourself
+# compete
+
+```
+
+
+## raspberry
+
+``` bash
+sudo apt update 
+sudo apt upgrade
+
+sudo rpi-update
+sudo reboot
+
+# 图像io库
+sudo apt install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev
+
+# 视频处理库
+sudo apt install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
+sudo apt install libxvidcore-dev libx264-dev
+
+# 安装gtk， 用于opencv gui显示
+sudo apt install libgtk2.0-dev
+
+
+sudo apt install libatlas-base-dev gfortran
+
+
+# 安装python 环境
+sudo apt-get install python2.7-dev python3-dev
+sudo apt-get install build-essential libssl-dev libevent-dev libjpeg-dev libxml2-dev libxslt-dev
+
+unzip ....
+
+cd opencv
+mkdir build
+cd build
+# warning change your path
+cmake -D CMAKE_BUILD_TYPE=RELEASE \
+    -D CMAKE_INSTALL_PREFIX=/usr/local \
+    -D OPENCV_EXTRA_MODULES_PATH=/program/opencv_contrib-3.3.0/modules \
+    -D ENABLE_NEON=ON \
+    -D ENABLE_VFPV3=ON \
+    -D BUILD_TESTS=OFF \
+    -D INSTALL_PYTHON_EXAMPLES=OFF \
+    -D BUILD_EXAMPLES=OFF ..
+
+# 修改swap空间大小
+vi  /etc/dphys-swapfile
+# 找到CONF_SWAPSIZE=100改为1024
+# set size to absolute value, leaving empty (default) then uses computed value
+#   you most likely don't want this, unless you have an special disk situation
+CONF_SWAPSIZE=1024
+
+sudo /etc/init.d/dphys-swapfile stop
+sudo /etc/init.d/dphys-swapfile start
+
+make -j4
+sudo make install
+sudo ldconfig
+
+
+xhost +
+export DISPLAY=:0.0
+
+```
@@ -0,0 +1,55 @@
+# 利用opencv录制视频
+
+``` cpp
+#include <opencv2/core.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui.hpp>
+#include <opencv2/imgproc.hpp>
+#include <iostream>
+
+using namespace cv;
+using namespace std;
+
+int main( )
+{
+    VideoCapture capture(0);//如果是笔记本，0打开的是自带的摄像头，1 打开外接的相机  
+    Mat img; 
+    VideoWriter vw;     //新建一个多媒体文件
+    namedWindow( "cam" );
+
+    int fps = capture.get(CAP_PROP_FPS ); //获取摄像头的帧率
+    cout << capture.get( CAP_PROP_FRAME_WIDTH )<<capture.get( CAP_PROP_FRAME_HEIGHT )<<fps<<endl;
+    if(fps <= 0 )fps = 25;
+    //设置视频的格式
+    vw.open( "out.avi", VideoWriter::fourcc( 'x', '2', '6', '4' ), fps, Size( capture.get( CAP_PROP_FRAME_WIDTH ), capture.get( CAP_PROP_FRAME_HEIGHT ) ) );
+   
+    if(!capture.isOpened( ))   //判断摄像头是否打开
+    {
+        cout << "open video faild";
+        return 0;
+    }
+    cout << "open video success" << endl;
+
+    if(!vw.isOpened())     //判断视频文件是否创建
+    {
+        cout << "open vw faild"<< endl;
+    }
+    cout << "open vw success" << endl;
+
+    while(1)
+    {
+        capture.read( img);  //读取视频帧
+        if(img.empty( ))
+            break; 
+        imshow("cam", img ); //显示视频帧
+        vw.write( img );   //将视频帧写入文件
+
+        if(waitKey( 10 ) == 'q') //q键退出录制
+            break;
+    }
+    return 0;
+    
+}
+
+
+```