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ObjectContouring.cpp
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ObjectContouring.cpp
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#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace cv;
using namespace std;
Mat canny_output,src, gausblur, mask,hsv,drawing;
int thresh = 200;
int max_thresh = 255;
RNG rng(12345);
int contouring();
/** @function main */
int main( int argc, char** argv )
{
cv::VideoCapture camera(0);
camera.set(CV_CAP_PROP_FRAME_WIDTH,640);
camera.set(CV_CAP_PROP_FRAME_HEIGHT,480);
camera.set(CV_CAP_PROP_FPS,20);
while(1){
/// Load source image and convert it to gray
camera >> src;
GaussianBlur( src, gausblur, cv::Size(9, 9), 2, 2 );
cvtColor(gausblur,hsv,COLOR_BGR2HSV);
inRange(hsv,Scalar(40,75,74),Scalar(90,255,255),mask);
erode(mask, mask, getStructuringElement(MORPH_ELLIPSE, Size(10, 10)) );
dilate( mask, mask, getStructuringElement(MORPH_ELLIPSE, Size(10, 10)) );
/// Convert image to gray and blur it
blur( mask, mask, Size(3,3) );
/// Create Window
cout << contouring() << endl;
}
waitKey(0);
return(0);
}
/** @function thresh_callback */
int contouring()
{
int numObjects = 0;
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
/// Detect edges using canny
Canny( mask, mask, thresh, thresh*2, 3 );
/// Find contours
findContours( mask, contours, hierarchy, CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
/// Draw contours
Mat drawing = Mat::zeros( mask.size(), CV_8UC3 );
for( int i = 0; i< contours.size(); i++ ){
Scalar color = Scalar( rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255) );
double area = contourArea(contours[i], true);
if (area < 500 )
continue;
numObjects +=1;
drawContours( src, contours, i, color, 2, 8, hierarchy, 0, Point() );
}
/// Show in a window
namedWindow( "original", CV_WINDOW_AUTOSIZE );
imshow( "original", src );
return numObjects;
}