#include <iostream>
#include <string>
#include <opencv2\opencv.hpp>
using namespace cv;
using namespace std;
int main()
{
Mat image1(600, 800, CV_8UC1);
Mat image2(600, 800, CV_8UC3);
for (int i = 0; i < image1.rows; i++)
{
uchar *p = image1.ptr<uchar>(i);
for (int j = 0; j < image1.cols; j++)
{
p[j] = (i + j) % 255;
}
}
for (int i = 0; i < image2.rows; i++)
{
Vec3b *p = image2.ptr<Vec3b>(i);
for (int j = 0; j < image2.cols; j++)
{
p[j][0] = i % 255;
p[j][1] = j % 255;
p[j][2] = 0;
}
}
imshow("image1", image1);
waitKey(0);
imshow("image2", image2);
waitKey(0);
/* Selection one row and multiply 2 of image1, then assign to line */
Mat line = image1.row(200) * 2;
imshow("line", line);
waitKey(0);
Mat A = Mat::eye(10, 10, CV_8U);
imshow("A", A);
waitKey(0);
Mat B = A(Range::all(), Range(1, 3));
imshow("B", B);
waitKey(0);
Mat C = B(Range(5, 9), Range::all());
imshow("C", C);
waitKey(0);
/* Selection some area */
Mat img(Size(320,240), CV_8UC3);
// Method 1: constructor
Mat roi(img, Rect(10, 10, 100, 100));
// Method 2: operator ()
Mat roi2 = img(Rect(10, 10, 100, 100));
// Method 3: operator () and Range object
Mat roi3 = img(Range(10, 100), Range(10, 100));
// Method 3: constructor
Mat roi4(img, Range(10, 100), Range(10, 100));
cout << "finished" << endl;
return 0;
}
Opencv,C++入门代码
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2022-03-20
14:42:15
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VSCode_OpenCV_C++.7z （75个子文件） 
OpenCV 1.MatMethod_at() 
main.cpp 770B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB
main.exe 332KB workspace opencv.code-workspace 511B 9.writeVedio main.cpp 1KB .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 335KB workspace opencv.code-workspace 574B
myvideo.mp4 228KB 8.readVedio main.cpp 877B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 333KB workspace opencv.code-workspace 574B myvideo.mp4 228KB 3.MatPointer main.cpp 768B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 331KB workspace opencv.code-workspace 511B 2.MatIterator main.cpp 837B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 384KB workspace opencv.code-workspace 511B 5.MatOperator main.cpp 1KB .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 347KB workspace opencv.code-workspace 574B 7.imageReadAndWrite main.cpp 414B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB
Happy.jpg 299KB main.exe 338KB
Happy-cany.png 13KB workspace opencv.code-workspace 574B 4.MatAreaSelection main.cpp 2KB .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 341KB workspace opencv.code-workspace 574B 6.Mat_ Class main.cpp 782B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB main.exe 355KB workspace opencv.code-workspace 574B 0.Opencv Environment prepare main.cpp 415B .vscode launch.json 1KB settings.json 4B c_cpp_properties.json 964B tasks.json 2KB Happy.jpg 299KB main.exe 361KB workspace opencv.code-workspace 511B
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