Visual Studio可以識別opencv函數，但不能識別COLOR_BGR2GRAY枚舉

Question

我正在C ++中學習opencv，但Visual Studio（2017年社區）無法識別枚舉COLOR_BGR2GRAY，但它可以識別opencv的其他功能。

這是源代碼：

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
#include <Windows.h>

using namespace cv;
using namespace std;

void drawSquares(Mat image);

int main(int argc, char** argv)
{
    if (argc != 2)
    {
        cout << " Usage: display_image ImageToLoadAndDisplay" << endl;
        return -1;
    }

    Mat image;
    image = imread(argv[1], IMREAD_COLOR); // Read the file

    if (!image.data) // Check for invalid input
    {
        cout << "Could not open or find the image" << std::endl;
        return -1;
    }

    namedWindow("Display window", WINDOW_AUTOSIZE); // Create a window for display.
    imshow("Display window", image); // Show our image inside it.



    waitKey(0); // Wait for a keystroke in the window
    return 0;
}

void drawSquares(Mat image)
{
    Mat image_gray;
    cvCvtColor(&image, &image_gray, COLOR_BGR2GRAY); //***it doest recognize this enum in this line***
}

知道為什么它不能識別功能但不能識別COLOR_BGR2GRAY枚舉嗎？

Answer 1

嘗試將COLOR_BGR2GRAY更改為cv::COLOR_BGR2GRAY並檢查是否cv::COLOR_BGR2GRAY