在树莓派中安装opencv

参考：http://blog.csdn.net/xukai871105/article/details/40988101

            http://www.pyimagesearch.com/2015/02/23/install-opencv-and-python-on-your-raspberry-pi-2-and-b/

安装完毕后测试。连接罗技C110和树莓派，

简单写一段调用摄像头的代码test_cam：

#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main(int argc,char ** argv)
{
  VideoCapture capture;
  capture.open(0);
  if(!capture.isOpened())
  {
     cerr << "open camera failed..." <<endl;
  }
  Mat frame;
  while(capture.read(frame))
  {
     imshow("cam",frame);
     waitKey(1);
  }
  return 0;
}

编写makefile:

INCLUDE =$(shell pkg-config --cflags opencv)
LIBS =$(shell pkg-config --libs opencv)
SOURCES =test_cam.cpp
#目标文件
OBJECTS =$(SOURCES:.cpp =.o)
#可执行文件
TARGET =test_cam
$(TARGET):$(OBJECTS)
	g++ -o $(TARGET) $(OBJECTS) -I $(INCLUDE) $(LIBS)
$(OBJECTS):$(SOURCES)
	g++ -c $(SOURCES)
clean:
	rm $(OBJECTS) $(TARGET)

%.o:%.cpp
	g++ -I $(INCLUDE) -o $@ -c $<

用装了ubuntu的laptop远程登陆树莓派（注意要用ssh -X pi@xxxx，否则运行程序时会报gtk-warning :cannot open display）。
在树莓派中直接make，编译cpp文件。编译后运行:./test_cam，就可以看到摄像头的实时拍摄视频了。