Imshow not showing the image window (VS Code)

C++
1 
#include <stdio.h>
#include<opencv2/opencv.hpp>

using namespace cv;

int main(int argc, char** argv) {
    Mat image;
    image = imread("D:/opencvproj/Trial/Elephant.jpg");
    if(!image.data)
    {
     printf("No image data \n");
     return -1;   
    }
    namedWindow("Display Image", WINDOW_AUTOSIZE);
    imshow("Display Image", image);
    waitKey(0);
    return 0;
}

After building, in the output

[main] Building folder: opencvproj
[build] Starting build
[proc] Executing command: "C:\Program Files\CMake\bin\cmake.EXE" --build d:/opencvproj/build --config Debug --target ALL_BUILD -j 10 --
[build] Microsoft (R) Build Engine version 16.11.2+f32259642 for .NET Framework
[build] Copyright (C) Microsoft Corporation. All rights reserved.
[build]
[build] Checking Build System
[build] Building Custom Rule D:/opencvproj/CMakeLists.txt
[build] main.cpp
[build] D:\opencvproj\main.cpp(8,20): warning C4129: 'o': unrecognized character escape sequence [D:\opencvproj\build\OpenCVTest.vcxproj]
[build] D:\opencvproj\main.cpp(8,20): warning C4129: 'T': unrecognized character escape sequence [D:\opencvproj\build\OpenCVTest.vcxproj]
[build] D:\opencvproj\main.cpp(8,20): warning C4129: 'E': unrecognized character escape sequence [D:\opencvproj\build\OpenCVTest.vcxproj]
[build] OpenCVTest.vcxproj -> D:\opencvproj\build\Debug\OpenCVTest.exe
[build] Building Custom Rule D:/opencvproj/CMakeLists.txt
[build] Build finished with exit code 0
[main] Building folder: opencvproj OpenCVTest
[build] Starting build
[proc] Executing command: "C:\Program Files\CMake\bin\cmake.EXE" --build d:/opencvproj/build --config Debug --target OpenCVTest -j 10 --
[build] Microsoft (R) Build Engine version 16.11.2+f32259642 for .NET Framework
[build] Copyright (C) Microsoft Corporation. All rights reserved.
[build]
[build] OpenCVTest.vcxproj -> D:\opencvproj\build\Debug\OpenCVTest.exe
[build] Build finished with exit code 0

run, in Terminal:

PS D:\opencvproj\build\Debug> ."D:/opencvproj/build/Debug/OpenCVTest.exe"
PS D:\opencvproj\build\Debug>
2

Are you sure that this is your actual source code? The warnings suggest that your image’s path uses backslashes, resulting in escape sequences \o and \T and a path that is wrong…

3

not an OpenCV issue.

all beginners have trouble grasping how paths work. this just results in issues with whatever APIs you call that expect you to understand paths.