C++ 如何在Raspberry Pi上使用OpenCV VideoCapture类?
我一直在尝试访问VideoCapture类,以便对每一帧执行一些图像处理,我不断获得一系列错误,顺序如下所述:C++ 如何在Raspberry Pi上使用OpenCV VideoCapture类?,c++,linux,opencv,arm,raspberry-pi3,C++,Linux,Opencv,Arm,Raspberry Pi3,我一直在尝试访问VideoCapture类,以便对每一帧执行一些图像处理,我不断获得一系列错误,顺序如下所述: :-1: error: main.o: undefined reference to symbol '_ZN2cv12GaussianBlurERKNS_11_InputArrayERKNS_12_OutputArrayENS_5Size_IiEEddi' /usr/local/lib/libopencv_imgproc.so.2.4:-1: error: error adding
:-1: error: main.o: undefined reference to symbol '_ZN2cv12GaussianBlurERKNS_11_InputArrayERKNS_12_OutputArrayENS_5Size_IiEEddi'
/usr/local/lib/libopencv_imgproc.so.2.4:-1: error: error adding symbols: DSO missing from command line
:-1: error: collect2: error: ld returned 1 exit status
我正在使用QtCreator和Rasberry Pi 3。我能够从磁盘加载图像,那么为什么我从OpenCV文档中提取的这段代码没有编译呢
我已通过输入terminal命令确保加载适用于linux驱动程序的适当视频:
sudo modprobe bcm2835-v4l2
这里是文档的链接
我自己解决了这个问题,对于任何遇到类似问题的人,错误DSO(动态共享对象)表明某个库(libopencv_imgproc.so.2.4)丢失 解决方案是修改你的.pro文件,我做了以下修改: INCLUDEPATH+=/usr/local/include/opencv-->/usr/local/include/opencv2 LIBS+=-L/usr/local/lib-lopencv\U core-lopencv\U highgui-->-L/usr/local/lib-lopencv\U core-lopencv\U imgproc-lopencv\U highgui
注意:如果您添加imgproc库而不包括opencv2,您将保留相同的错误 你用的是什么味道的Linux?Raspbian Jessie
#include "opencv2/opencv.hpp"
using namespace cv;
int main(int, char**)
{
VideoCapture cap(0); // open the default camera
if(!cap.isOpened()) // check if we succeeded
return -1;
Mat edges;
namedWindow("edges",1);
for(;;)
{
Mat frame;
cap >> frame; // get a new frame from camera
cvtColor(frame, edges, CV_BGR2GRAY);
GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
Canny(edges, edges, 0, 30, 3);
imshow("edges", edges);
if(waitKey(30) >= 0) break;
}
// the camera will be deinitialized automatically in VideoCapture destructor
return 0;
}