OpenCV錯誤：斷言失敗（scn == 3 || scn == 4）在cv :: cvtColor中，文件.. \\ .. \\ .. \\ .. \\ opencv \\ modules \\ imgproc \\ src \\ color.cpp，第3737行

Question

您好我試圖從OpenCV運行此示例代碼：

#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;
}

我目前在Macbook Pro上使用Windows 7 x64 BootCamp。 我正在使用Visual Studios 2013和OpenCV 2.4.9運行此代碼。

這就是我設置配置屬性的方法：

VC++ Directories: Include Directories: H:\opencv\build\include;$(IncludePath)

Linker:General:Additional Library Directories: H:\opencv\build\x64\vc12\lib;%(AdditionalLibraryDirectories)
Linker:Input:Additional Dependencies: opencv_calib3d249.lib;opencv_contrib249.lib;opencv_core249.lib;opencv_features2d249.lib;opencv_flann249.lib;opencv_gpu249.lib;opencv_highgui249.lib;opencv_imgproc249.lib;opencv_legacy249.lib;opencv_ml249.lib;opencv_nonfree249.lib;opencv_objdetect249.lib;opencv_ocl249.lib;opencv_photo249.lib;opencv_stitching249.lib;opencv_superres249.lib;opencv_ts249.lib;opencv_video249.lib;opencv_videostab249.lib;%(AdditionalDependencies)

當我在Release x64模式下單擊Local Windows Debugger時，我從Visual Studios收到以下錯誤：

Project3.exe中0x000007FEFD21B3DD的第一次機會異常：Microsoft C ++異常：cv ::內存位置0x000000000019A8A0的異常。

如果存在此異常的處理程序，則可以安全地繼續該程序。

當我單擊Break而不是（害怕按Continue）時，會彈出一個名為Edges的窗口，並且自綠燈亮起后相機會打開。 但我也在命令窗口中收到以下錯誤：

OpenCV錯誤：斷言失敗（scn == 3 || scn == 4）在cv :: cvtColor中，文件........ \\ opencv \\ modules \\ imgproc \\ src \\ color.cpp，第3737行

我是C ++和Visual Studios的新手，任何幫助都會受到贊賞。 提前致謝！

Answer 1

從評論中的對話到問題，我們看到VideoCapture以灰度顯示幀。 因此，對cvtColor的調用導致了崩潰。

...
Mat frame;
cap >> frame; // frame is already CV_8UC1
//cvtColor(frame, edges, CV_BGR2GRAY); // so don't to convert here, or crash!
edges = frame.clone(); 
...