Hello, I have created a program and I am successfully able to detect convex hull and convexity defects but I am unable to find finger tips reliably. I am too much exhausted now. HELP ME PLEASE Here is my code
#include <iostream> #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include <sstream> #include <string> #include <stdio.h> #include <stdlib.h> #include <opencv/highgui.h> #include <opencv2/opencv.hpp> #include <opencv/cxcore.h> #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/highgui/highgui.hpp" using namespace cv; using namespace std; void DetectContour(Mat img) { Mat drawing = Mat::zeros( img.size(), CV_8UC3 ); vector<vector<Point> > contours; vector<vector<Point> > bigContours; vector<Vec4i> hierarchy; findContours(img,contours, hierarchy, cv::RETR_LIST, cv::CHAIN_APPROX_SIMPLE, Point()); if(contours.size() > 0) { vector<vector<int> >hull( contours.size() ); vector<vector<Vec4i> > convDef(contours.size() ); vector<vector<Point> > hull_points(contours.size()); vector<vector<Point> > defect_points(contours.size()); for( int i = 0; i < contours.size(); i++ ) { if(contourArea(contours[i]) > 5000) { convexHull( contours[i], hull[i], false ); convexityDefects( contours[i],hull[i], convDef[i]); for(int k=0; k < hull[i].size() ; k++) { int ind=hull[i][k]; hull_points[i].push_back(contours[i][ind]); } for(int k=0;k<convDef[i].size();k++) { if( convDef[i][k][3] > 20*256 ) { // filter defects by depth int ind_0=convDef[i][k][0]; int ind_1=convDef[i][k][1]; int ind_2=convDef[i][k][2]; defect_points[i].push_back(contours[i][ind_2]); circle(drawing,contours[i][ind_0],5,Scalar(0,255,0),-1); circle(drawing,contours[i][ind_1],5,Scalar(0,255,0),-1); circle(drawing,contours[i][ind_2],5,Scalar(0,0,255),-1); line(drawing,contours[i][ind_2],contours[i][ind_0],Scalar(0,0,255),1); line(drawing,contours[i][ind_2],contours[i][ind_1],Scalar(0,0,255),1); } } drawContours( drawing, contours, i, Scalar(0,255,0), 1, 8, vector<Vec4i>(), 0, Point() ); drawContours( drawing, hull_points, i, Scalar(255,0,0), 1, 8, vector<Vec4i>(), 0, Point() ); } } } imshow( "Hull demo", drawing ); } int main(void) { int lh = 0; int hh = 179; int ls = 0; int hs = 255; int lv = 0; int hv = 255; namedWindow("HSV",CV_WINDOW_AUTOSIZE); createTrackbar("LH","HSV",&lh,179); createTrackbar("HH","HSV",&hh,179); createTrackbar("LS","HSV",&ls,255); createTrackbar("HS","HSV",&hs,255); createTrackbar("LV","HSV",&lv,255); createTrackbar("HV","HSV",&hv,255); Mat img; VideoCapture cap(0); int th = 100; while(cap.read(img)) { Mat frame; cvtColor(img,frame,CV_BGR2HSV); inRange(frame,Scalar(lh,ls,lv),Scalar(hh,hs,hv),frame); threshold(frame,frame,th,2*th+55,THRESH_OTSU); DetectContour(frame); if(waitKey(5) == 27) break; } destroyAllWindows(); return 0; }