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/*
* create_mask.cpp
*
* Author:
* Siddharth Kherada <siddharthkherada27[at]gmail[dot]com>
*
* This tutorial demonstrates how to make mask image (black and white).
* The program takes as input a source image and ouputs its corresponding
* mask image.
*/
#include "opencv2/imgproc.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/core.hpp"
#include <iostream>
#include <stdlib.h>
using namespace std;
using namespace cv;
Mat img0, img1, res1, final;
Point point;
int drag = 0;
int numpts = 100;
Point* pts = new Point[100];
int var = 0;
int flag = 0;
int flag1 = 0;
int minx,miny,maxx,maxy,lenx,leny;
int channel;
void mouseHandler(int, int, int, int, void*);
void mouseHandler(int event, int x, int y, int, void*)
{
if (event == EVENT_LBUTTONDOWN && !drag)
{
if(flag1 == 0)
{
if(var==0)
img1 = img0.clone();
point = Point(x, y);
circle(img1,point,2,Scalar(0, 0, 255),-1, 8, 0);
pts[var] = point;
var++;
drag = 1;
if(var>1)
line(img1,pts[var-2], point, Scalar(0, 0, 255), 2, 8, 0);
imshow("Source", img1);
}
}
if (event == EVENT_LBUTTONUP && drag)
{
imshow("Source", img1);
drag = 0;
}
if (event == EVENT_RBUTTONDOWN)
{
flag1 = 1;
img1 = img0.clone();
for(int i = var; i < numpts ; i++)
pts[i] = point;
if(var!=0)
{
const Point* pts3[1] = {&pts[0]};
polylines( img1, pts3, &numpts,1, 1, Scalar(0,0,0), 2, 8, 0);
}
for(int i=0;i<var;i++)
{
minx = min(minx,pts[i].x);
maxx = max(maxx,pts[i].x);
miny = min(miny,pts[i].y);
maxy = max(maxy,pts[i].y);
}
lenx = maxx - minx;
leny = maxy - miny;
imshow("Source", img1);
}
if (event == EVENT_RBUTTONUP)
{
flag = var;
final = Mat::zeros(img0.size(),CV_8UC3);
res1 = Mat::zeros(img0.size(),CV_8UC1);
const Point* pts4[1] = {&pts[0]};
fillPoly(res1, pts4,&numpts, 1, Scalar(255, 255, 255), 8, 0);
bitwise_and(img0, img0, final,res1);
imshow("mask",res1);
imwrite("mask.png",res1);
imshow("Source", img1);
}
if (event == EVENT_MBUTTONDOWN)
{
for(int i = 0; i < numpts ; i++)
{
pts[i].x=0;
pts[i].y=0;
}
var = 0;
flag1 = 0;
minx = INT_MAX; miny = INT_MAX; maxx = INT_MIN; maxy = INT_MIN;
imshow("Source", img0);
drag = 0;
}
}
int main(int argc, char **argv)
{
if(argc != 2)
{
cout << "usage: " << argv[0] << " <input_image>" << endl;
exit(1);
}
Mat src = imread(argv[1]);
minx = INT_MAX; miny = INT_MAX; maxx = INT_MIN; maxy = INT_MIN;
img0 = src;
channel = img0.channels();
res1 = Mat::zeros(img0.size(),CV_8UC1);
final = Mat::zeros(img0.size(),CV_8UC3);
//////////// source image ///////////////////
namedWindow("Source", 1);
setMouseCallback("Source", mouseHandler, NULL);
imshow("Source", img0);
waitKey(0);
img0.release();
img1.release();
}