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9aa5f3f1db
Move API focused C++ samples to snippets #25252 Clean Samples #25006 This PR removes 39 outdated C++ samples from the project, as part of an effort to keep the codebase clean and focused on current best practices.
119 lines
2.7 KiB
C++
119 lines
2.7 KiB
C++
/*
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* create_mask.cpp
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*
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* Author:
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* Siddharth Kherada <siddharthkherada27[at]gmail[dot]com>
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*
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* This tutorial demonstrates how to make mask image (black and white).
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* The program takes as input a source image and outputs its corresponding
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* mask image.
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*/
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#include "opencv2/imgproc.hpp"
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#include "opencv2/imgcodecs.hpp"
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#include "opencv2/highgui.hpp"
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#include <iostream>
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using namespace std;
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using namespace cv;
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Mat src, img1, mask, final;
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Point point;
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vector<Point> pts;
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int drag = 0;
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int var = 0;
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int flag = 0;
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void mouseHandler(int, int, int, int, void*);
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void mouseHandler(int event, int x, int y, int, void*)
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{
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if (event == EVENT_LBUTTONDOWN && !drag)
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{
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if (flag == 0)
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{
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if (var == 0)
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img1 = src.clone();
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point = Point(x, y);
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circle(img1, point, 2, Scalar(0, 0, 255), -1, 8, 0);
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pts.push_back(point);
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var++;
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drag = 1;
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if (var > 1)
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line(img1,pts[var-2], point, Scalar(0, 0, 255), 2, 8, 0);
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imshow("Source", img1);
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}
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}
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if (event == EVENT_LBUTTONUP && drag)
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{
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imshow("Source", img1);
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drag = 0;
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}
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if (event == EVENT_RBUTTONDOWN)
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{
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flag = 1;
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img1 = src.clone();
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if (var != 0)
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{
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polylines( img1, pts, 1, Scalar(0,0,0), 2, 8, 0);
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}
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imshow("Source", img1);
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}
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if (event == EVENT_RBUTTONUP)
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{
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flag = var;
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final = Mat::zeros(src.size(), CV_8UC3);
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mask = Mat::zeros(src.size(), CV_8UC1);
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fillPoly(mask, pts, Scalar(255, 255, 255), 8, 0);
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bitwise_and(src, src, final, mask);
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imshow("Mask", mask);
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imshow("Result", final);
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imshow("Source", img1);
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}
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if (event == EVENT_MBUTTONDOWN)
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{
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pts.clear();
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var = 0;
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drag = 0;
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flag = 0;
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imshow("Source", src);
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}
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}
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int main(int argc, char **argv)
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{
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CommandLineParser parser(argc, argv, "{@input | lena.jpg | input image}");
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parser.about("This program demonstrates using mouse events\n");
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parser.printMessage();
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cout << "\n\tleft mouse button - set a point to create mask shape\n"
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"\tright mouse button - create mask from points\n"
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"\tmiddle mouse button - reset\n";
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String input_image = parser.get<String>("@input");
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src = imread(samples::findFile(input_image));
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if (src.empty())
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{
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printf("Error opening image: %s\n", input_image.c_str());
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return 0;
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}
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namedWindow("Source", WINDOW_AUTOSIZE);
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setMouseCallback("Source", mouseHandler, NULL);
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imshow("Source", src);
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waitKey(0);
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return 0;
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}
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