在vscode中使用opencv
在vscode中使用opencv2.4.12，在已安装opencv3.x的情况下
之前我们讲了如何编译opencv2.4.12的方法，本文讲如何在vscode中使用opencv2412。实际上，由于ubuntu下面已经安装了opencv3.x版本，一般而言，opencv3.x在安装后，头文件一般会被放在/usr/local/include目录下面。opencv2.4.12编译后是不能make install的，否则会覆盖掉opencv3.x的目录，可能产生包的引用混乱问题。
实际上，由于/usr/local/include这个文件夹会被系统默认的加入到开发环境，因此在代码中引用opencv的时候，会自动在该文件夹下面找相应的头文件。
若要使用opencv2.4.12，我们需要修改vscode的.vscode文件夹下面几个配置文件。目的其实就在搜索opencv头文件时，用opencv2.4.12的头文件夹路径，是覆盖掉/usr/local/include下的opencv3。
具体地，
- 在
.vscode文件夹下新建c_cpp_properties.json文件，内容如下：
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**",
"/home/wyx/software/opencv-2.4.12/sources/include",
"/home/wyx/software/opencv-2.4.12/sources/modules",
"/home/wyx/software/opencv-2.4.12/sources/modules/legacy",
"/home/wyx/software/opencv-2.4.12/sources/modules/legacy/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/core/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/flann/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/features2d/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/objdetect/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/calib3d/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/imgproc/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/video/include",
"/home/wyx/software/opencv-2.4.12/sources/modules/highgui/include"
],
"defines": [],
"compilerPath": "/usr/bin/gcc-4.8",
"cStandard": "c11",
"cppStandard": "c++14",
"intelliSenseMode": "clang-x64"
}
],
"version": 4
}
注意这里面的includePath是你的opencv2412的各个模块的头文件路径，代码中缺什么就补什么。c_cpp_properties.json的目的是，只是提示vscode，该从哪里去找头文件。
tasks.json内容如下：
{
"tasks": [
{
"type": "shell",
"label": "C/C++: g++ build active file",
"command": "/usr/bin/g++-4.8",
"args": [
"-g",
"-std=c++11",
"-c",
"${file}",
"-o",
"${fileDirname}/${fileBasenameNoExtension}.o",
"-I", "/home/wyx/software/opencv-2.4.12/sources/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/include/opencv",
"-I", "/home/wyx/software/opencv-2.4.12/sources/include/opencv2",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/legacy",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/legacy/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/core/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/flann/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/features2d/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/objdetect/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/calib3d/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/imgproc/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/video/include",
"-I", "/home/wyx/software/opencv-2.4.12/sources/modules/highgui/include",
"-L", "/home/wyx/software/opencv-2.4.12/build/lib",
"-l", "opencv_aruco",
"-l", "opencv_bgsegm",
"-l", "opencv_bioinspired",
"-l", "opencv_calib3d",
"-l", "opencv_ccalib",
"-l", "opencv_core",
"-l", "opencv_datasets",
"-l", "opencv_dnn_objdetect",
"-l", "opencv_dnn",
"-l", "opencv_dpm",
"-l", "opencv_face",
"-l", "opencv_features2d",
"-l", "opencv_flann",
"-l", "opencv_freetype",
"-l", "opencv_fuzzy",
"-l", "opencv_hfs",
"-l", "opencv_highgui",
"-l", "opencv_imgcodecs",
"-l", "opencv_img_hash",
"-l", "opencv_imgproc",
"-l", "opencv_line_descriptor",
"-l", "opencv_ml",
"-l", "opencv_objdetect",
"-l", "opencv_optflow",
"-l", "opencv_phase_unwrapping",
"-l", "opencv_photo",
"-l", "opencv_plot",
"-l", "opencv_reg",
"-l", "opencv_rgbd",
"-l", "opencv_saliency",
"-l", "opencv_shape",
"-l", "opencv_stereo",
"-l", "opencv_stitching",
"-l", "opencv_structured_light",
"-l", "opencv_superres",
"-l", "opencv_surface_matching",
"-l", "opencv_text",
"-l", "opencv_tracking",
"-l", "opencv_videoio",
"-l", "opencv_video",
"-l", "opencv_videostab",
"-l", "opencv_xfeatures2d",
"-l", "opencv_ximgproc",
"-l", "opencv_xobjdetect",
"-l", "opencv_xphoto"
],
"options": {
"cwd": "${workspaceFolder}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
}
}
],
"version": "2.0.0"
}
tasks.json是构建任务的默认配置，"-I"的部分和c_cpp_properties.json的头文件路径一致，-L就是编译opencv2412后的lib路径，-l就是库的名称，注意这里面可能有些名称在lib路径下是没有的，不过不影响。如果有-c参数的话，-L和-l的部分是不需要的。
通过这样配置的话，就可以通过Ctrl+Shift+B对包含opencv2412的cpp文件进行编译了。