Debug OpenCV Cpp con VIsual Code

come compilare il programma di esempio di OpenCv con Visual Code

 

 

Installare le estensioni CMake, CMale Tools, C++ Intellisense

CMakeLists.txt

# CMakeLists.txt

# Older versions of CMake are likely to work just fine but, since

# I don't know where to cut off I just use the version I'm using

cmake_minimum_required(VERSION "3.17")

# name of this example project

project(simple-demo)

# set OpenCV_DIR variable equal to the path to the cmake

# files within the previously installed opencv program

set(OpenCV_DIR /home/luca/opencv/install/lib/cmake/opencv4)

# Tell compiler to use C++ 14 features which is needed because

# Clang version is often behind in the XCode installation

set(CMAKE_CXX_STANDARD 14)

# configure the necessary common CMake environment variables

# needed to include and link the OpenCV program into this

# demo project, namely OpenCV_INCLUDE_DIRS and OpenCV_LIBS

find_package( OpenCV REQUIRED )

# tell the build to include the headers from OpenCV

include_directories( ${OpenCV_INCLUDE_DIRS} )

# specify the executable target to be built

add_executable(simple-demo main.cpp)

# tell it to link the executable target against OpenCV

target_link_libraries(simple-demo ${OpenCV_LIBS} )

.vscode/launch.json 

qui si possono inserire gli argomenti da linea di comando

se si imposta a false stopAtEntry il debugger si ferma solo ai breakpoint

{

"version": "0.2.0",

"configurations": [

{

"name": "(gdb) Debugger",

"type": "cppdbg",

"request": "launch",

"program": "${workspaceFolder}/build/simple-demo",

"args": ["valeria.jpg"],

"stopAtEntry": true,

"cwd": "${workspaceFolder}",

"environment": [],

"externalConsole": true,

"MIMode": "gdb"

}

]

}

main.cpp

#include <iostream>

#include <opencv2/opencv.hpp>

#include <opencv2/highgui.hpp>

using std::cout;

using std::endl;

int main(int argc, char** argv) {

if (argc != 2) {

cout << "Expecting a image file to be passed to program" << endl;

return -1;

}

cv::Mat img = cv::imread(argv[1]);

if (img.empty()) {

cout << "Not a valid image file" << endl;

return -1;

}

cv::namedWindow("Simple Demo", cv::WINDOW_AUTOSIZE);

cv::imshow("Simple Demo", img);

cv::waitKey(0);

cv::destroyAllWindows();

return 0;

}