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我现在在 linux 上使用 OpenCV 2.4.3。在我的 /dev/ 中有一个名为 video0 的设备,它可以很好地处理奶酪。

目前我正在使用以下代码尝试访问相机。这段代码是用 qtcreator 编写的,并用 qmake 编译以包含必要的库。至于OpenCV库,我下载了源代码,并在我的机器上按照网站上的说明进行编译。

++main.cpp:

#include <iostream>
#include <opencv2/opencv.hpp>
#include <cstdlib>

int main(int argc, char** argv) {
    int cameraNumber = 0;
    if (argc>1)
        cameraNumber = atoi(argv[1]);
    cv::VideoCapture camera;
    camera.open(cameraNumber);
    if(!camera.isOpened()) {
        std::cerr<<"Error opening camera"<<std::endl;
        exit(1);
    }
    camera.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    while(true) {
        cv::Mat cameraFrame;
        camera>>cameraFrame;
        if (cameraFrame.empty()){
            std::cerr<<"No frame read from camera"<<std::endl;
            exit(1);
        }
        imshow("Camera",cameraFrame);

        char keypress = cv::waitKey(20);
        if (keypress==27) {
            break;
        }
    }
    return 0;
}

++test.pro

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.cpp

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/release/ -lopencv_core
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/debug/ -lopencv_core
else:unix: LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/ -lopencv_core

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/release/ -lopencv_highgui
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/debug/ -lopencv_highgui
else:unix: LIBS += -L$$PWD/../../../../opt/OpenCV-2.4.3/lib/ -lopencv_highgui

INCLUDEPATH += $$PWD/../../../../opt/OpenCV-2.4.3/include
DEPENDPATH += $$PWD/../../../../opt/OpenCV-2.4.3/include

但是,运行程序时会输出Error opening camera并退出,这意味着相机没有成功打开。我已经用谷歌搜索了一段时间,没有找到任何可能的解决方案来解决这个问题。有人能给我一些关于如何解决这个问题的建议吗?谢谢!

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1 回答 1

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也许您缺少一些 linux 所需的附加库。

根据OpenCV 安装指南 Extra Prerequisites,在 linux 上使用 OpenCV 时,您需要安装以下库:ffmpeg、libgstreamer、libv4l、libxine、unicap、libdc1394 2.x。

在 Ubuntu 12.04 上,安装以下软件包对我有用 (*sudo apt-get install __ *):

  • python-opencv
  • libhighgui2.3
  • libhighgui-dev
  • ffmpeg
  • libgstreamer0.10-0
  • libv4l-0
  • libv4l-开发
  • libxine2
  • libunicap2
  • libdc1394-22

祝你好运!

于 2013-01-07T13:23:15.370 回答