YOLO---YOLOv3 with OpenCV 再使用

#readme.txt
Run the getModels.sh file from command line to download the needed model files

    sudo chmod a+x getModels.sh
    ./getModels.sh

Python:
Commandline usage to colorize 
a single image:
    python3 object_detection_yolo.py --image=bird.jpg
a video file:
    python3 object_detection_yolo.py --video=run.mp4

C++:
a single image:
    ./object_detection_yolo.out --image=bird.jpg
a video file:
    ./object_detection_yolo.out --video=run.mp4

Compilation examples:
g++ -ggdb `pkg-config --cflags --libs /usr/local/Cellar/opencv3/3.4.2/lib/pkgconfig/opencv.pc` object_detection_yolo.cpp -o object_detection_yolo.out

g++ -ggdb `pkg-config --cflags --libs /usr/local/opencv3.4.2/lib/pkgconfig/opencv.pc` object_detection_yolo.cpp -o object_detection_yolo.out

# For OpenCV 2.4.x 
cd /path/to/opencv/samples/c/
# For OpenCV 3 
cd /path/to/opencv/samples/cpp/
#Compile
g++ -ggdb facedetect.cpp -o facedetect `pkg-config --cflags --libs opencv`
#run
./facedetect

/usr/local/opencv3.4.2/include/opencv2/??
cd /home/u/opencv3.4.2/samples/cpp/  ??
g++ -ggdb `pkg-config --cflags --libs /usr/lib/x86_64-linux-gnu/pkgconfig/opencv.pc` object_detection_yolo.cpp -o object_detection_yolo.out

g++ -ggdb object_detection_yolo.cpp -o object_detection_yolo.out `pkg-config --cflags --libs /usr/lib/x86_64-linux-gnu/pkgconfig/opencv.pc`

g++ object_detection_yolo.cpp -o object_detection_yolo `pkg-config --cflags --libs /usr/lib/x86_64-linux-gnu/pkgconfig/opencv.pc`

运行：
g++ object_detection_yolo.cpp -o object_detection_yolo `pkg-config --cflags --libs /usr/lib/x86_64-linux-gnu/pkgconfig/opencv.pc`

报错：
No package ‘object_detection_yolo‘ found
object_detection_yolo.cpp:10:31: fatal error: opencv2/highgui.hpp: 没有那个文件或目录
 #include <opencv2/highgui.hpp>
                               ^
compilation terminated.
u@u1604:~/yolov3-opencv3.4.2/yolo-opencv$ g++ `pkg-config object_detection_yolo --cflags` object_detection_yolo.cpp  -o opencv `pkg-config opencv --libs`
Package object_detection_yolo was not found in the pkg-config search path.
Perhaps you should add the directory containing `object_detection_yolo.pc‘
to the PKG_CONFIG_PATH environment variable
No package ‘object_detection_yolo‘ found
object_detection_yolo.cpp:11:31: fatal error: opencv2/imgproc.hpp: 没有那个文件或目录
 #include <opencv2/imgproc.hpp>
                               ^
compilation terminated.
u@u1604:~/yolov3-opencv3.4.2/yolo-opencv$ g++ `pkg-config object_detection_yolo --cflags` object_detection_yolo.cpp  -o opencv `pkg-config opencv --libs`
Package object_detection_yolo was not found in the pkg-config search path.
Perhaps you should add the directory containing `object_detection_yolo.pc‘
to the PKG_CONFIG_PATH environment variable
No package ‘object_detection_yolo‘ found
object_detection_yolo.cpp:13:27: fatal error: opencv2/dnn.hpp: 没有那个文件或目录
 #include <opencv2/dnn.hpp>
                           ^
compilation terminated.

解决：
查看object_detection_yolo.cpp中highgui.hpp、imgproc.hpp、dnn.hpp都能找到文件，猜测是路径读不进来，按提示更改，
#include <opencv2/highgui/highgui.hpp> 
#include <opencv2/imgproc/imgproc.hpp> 
#include <opencv2/dnn/dnn.hpp> 
//#include <opencv2/highgui.hpp> 
//#include <opencv2/imgproc.hpp> 
//#include <opencv2/dnn.hpp>
--------------------
拷贝
sudo cp -r /home/用户名/桌面/lib /usr 
sudo cp -r /home/u/桌面/dnn.hpp /usr/include/opencv2/dnn
新建
sudo touch filename   新建文件
sudo mkdir foldername 新建文件夹
删除
sudo rm -rf 文件夹
sudo rm -rf 文件
----------------------------------

上一步，通了
继续执行：
g++ `pkg-config opencv --cflags` object_detection_yolo.cpp  -o object_detection_yolo `pkg-config opencv --libs` 

（参考 g++ `pkg-config opencv --cflags` opencv.cpp -o opencv `pkg-config opencv --libs` #将OpenCV的库包含进去，进行编译）

报错：
------------------------------
u@u1604:~/yolov3-opencv3.4.2/yolo-opencv$ g++ `pkg-config opencv --cflags` object_detection_yolo.cpp  -o object_detection_yolo `pkg-config opencv --libs` object_detection_yolo.cpp: In function ‘int main(int, char**)’:
object_detection_yolo.cpp:77:31: error: no matching function for call to ‘std::basic_ifstream<char>::basic_ifstream(std::__cxx11::string&)’
             ifstream ifile(str);
------------------------------

解决：
gcc/g++以c++11编译(仅g++ 4.8及以上版本才支持C++ 11标准。)
g++ --version
g++ -V
再执行OK：
g++ `pkg-config opencv --cflags` object_detection_yolo.cpp -o object_detection_yolo `pkg-config opencv --libs` -std=c++11

执行可执行文件：
./object_detection_yolo --image=./data/1.jpg