opencv-webcam.cpp

#include <iostream>
#include "opencv2/opencv.hpp"
#define brk imshow("1", m1); if (waitKey(5) >= 0) break;
using namespace cv;
using namespace std;

Mat lookup(1, 256, CV_8U);

void make_lookup(uchar k) {
	uchar* p = lookup.data;
	for(int i=0; i<16; i++)
		for(int j=0; j<16; j++)
			p[i*16 + j] = (uchar) i*(j + k);
}

int main(int, char**) {
	VideoCapture cap(0);
	//cap.open("/home/taras/Videos/Aeroplan.1980.BDRip.avi");
	if (!cap.isOpened())
		return -1;
	cout << cap.get(CV_CAP_PROP_FRAME_WIDTH) << "x"
	     << cap.get(CV_CAP_PROP_FRAME_HEIGHT) << endl;
	cap.set(CV_CAP_PROP_POS_FRAMES, 30000);
	namedWindow("1", 1);
	make_lookup(0);
	Mat kern = (Mat_<char>(3,3) <<  0, -1,  0,
                               -1,  5, -1,
                                0, -1,  0);	
	
	int a = 0, b = 64, c = 128, d = 192;
	while(true) {
		Mat m1, m2, m3, m4, m5;
		cap >> m2;
		//resize(m1, m2, Size(1056, 600));
		GaussianBlur(m2, m1, Size(11,11), 5, 5);
		make_lookup(a++);
		LUT(m1, lookup, m2);
		make_lookup(b--);
		LUT(m1, lookup, m3);
		addWeighted(m2, ((double)c)/255, m3, ((double)d)/255, 0.0, m1);
		//brk
		make_lookup(c++);
		LUT(m1, lookup, m4);
		make_lookup(d--);
		LUT(m1, lookup, m5);
		addWeighted(m4, ((double)a)/255, m5, ((double)b)/255, 0.0, m1);
		addWeighted(m1, 0.5, m2, 0.5, 0.0, m3);
		filter2D(m3, m2, m3.depth(), kern );
		GaussianBlur(m2, m1, Size(3,3), 1, 1);		
		brk
	}
}