問題描述

我正在嘗試運(yùn)行這個(gè)簡單的 OpenCV 程序，但出現(xiàn)此錯(cuò)誤:

I am trying to run this simple OpenCV program, but i got this error:

OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow, file .../opencv/modules/highgui/src/window.cpp, line 276

代碼:

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

using namespace std;

int main()
{
    cout << "Hello World!" << endl;

    cv::Mat inputImage = cv::imread("/home/beniz1.jpg");
    cv::imshow("Display Image", inputImage);

    return 0;
}

這個(gè)錯(cuò)誤的原因是什么?

What's the cause of this error?

推薦答案

此錯(cuò)誤表示您正在嘗試顯示空?qǐng)D像.當(dāng)你用imshow加載圖片時(shí)，這通常是由于:

This error means that you are trying to show an empty image. When you load the image with imshow, this is usually caused by:

1. 你的圖片路徑錯(cuò)誤(在 Windows 中轉(zhuǎn)義兩次目錄分隔符，例如 imread("C:path oimage.png") 應(yīng)該是:imread("C:\path\to\image.png") 或 imread("C:/path/to/image.png"));
2. 圖片擴(kuò)展名錯(cuò)誤.(例如.jpg"不同于.jpeg")；
3. 您無權(quán)訪問該文件夾.

排除其他問題的一個(gè)簡單解決方法是將圖像放在您的項(xiàng)目目錄中，然后簡單地將文件名 (imread("image.png") 傳遞給 imread).

A simple workaround to exclude other problems is to put the image in your project dir, and simply pass to imread the filename (imread("image.png")).

記得加上waitKey();，否則什么都看不到.

Remember to add waitKey();, otherwise you won't see anything.

您可以檢查圖像是否已正確加載，例如:

You can check if an image has been loaded correctly like:

#include <opencv2opencv.hpp>
#include <iostream>
using namespace cv;

int main()
{
    Mat3b img = imread("path_to_image");

    if (!img.data)
    {
        std::cout << "Image not loaded";
        return -1;
    }

    imshow("img", img);
    waitKey();
    return 0;
}

這篇關(guān)于OpenCV Error: Assertion failed (size.width>0 &&size.height>0) 簡單代碼的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！