mirror of
https://github.com/opencv/opencv.git
synced 2024-11-25 11:40:44 +08:00
86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
#include "opencv2/highgui/highgui.hpp"
|
|
#include "opencv2/imgproc/imgproc.hpp"
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <iostream>
|
|
|
|
using namespace cv;
|
|
using namespace std;
|
|
|
|
static void help()
|
|
{
|
|
cout <<
|
|
"\nThis program demonstrates Laplace point/edge detection using OpenCV function Laplacian()\n"
|
|
"It captures from the camera of your choice: 0, 1, ... default 0\n"
|
|
"Call:\n"
|
|
"./laplace [camera #, default 0]\n" << endl;
|
|
}
|
|
|
|
int sigma = 3;
|
|
int smoothType = CV_GAUSSIAN;
|
|
|
|
int main( int argc, char** argv )
|
|
{
|
|
VideoCapture cap;
|
|
help();
|
|
|
|
if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
|
|
cap.open(argc == 2 ? argv[1][0] - '0' : 0);
|
|
else if( argc >= 2 )
|
|
{
|
|
cap.open(argv[1]);
|
|
if( cap.isOpened() )
|
|
cout << "Video " << argv[1] <<
|
|
": width=" << cap.get(CV_CAP_PROP_FRAME_WIDTH) <<
|
|
", height=" << cap.get(CV_CAP_PROP_FRAME_HEIGHT) <<
|
|
", nframes=" << cap.get(CV_CAP_PROP_FRAME_COUNT) << endl;
|
|
if( argc > 2 && isdigit(argv[2][0]) )
|
|
{
|
|
int pos;
|
|
sscanf(argv[2], "%d", &pos);
|
|
cout << "seeking to frame #" << pos << endl;
|
|
cap.set(CV_CAP_PROP_POS_FRAMES, pos);
|
|
}
|
|
}
|
|
|
|
if( !cap.isOpened() )
|
|
{
|
|
cout << "Could not initialize capturing...\n";
|
|
return -1;
|
|
}
|
|
|
|
namedWindow( "Laplacian", 0 );
|
|
createTrackbar( "Sigma", "Laplacian", &sigma, 15, 0 );
|
|
|
|
Mat smoothed, laplace, result;
|
|
|
|
for(;;)
|
|
{
|
|
Mat frame;
|
|
cap >> frame;
|
|
if( frame.empty() )
|
|
break;
|
|
|
|
int ksize = (sigma*5)|1;
|
|
if(smoothType == CV_GAUSSIAN)
|
|
GaussianBlur(frame, smoothed, Size(ksize, ksize), sigma, sigma);
|
|
else if(smoothType == CV_BLUR)
|
|
blur(frame, smoothed, Size(ksize, ksize));
|
|
else
|
|
medianBlur(frame, smoothed, ksize);
|
|
|
|
Laplacian(smoothed, laplace, CV_16S, 5);
|
|
convertScaleAbs(laplace, result, (sigma+1)*0.25);
|
|
imshow("Laplacian", result);
|
|
|
|
int c = waitKey(30);
|
|
if( c == ' ' )
|
|
smoothType = smoothType == CV_GAUSSIAN ? CV_BLUR : smoothType == CV_BLUR ? CV_MEDIAN : CV_GAUSSIAN;
|
|
if( c == 'q' || c == 'Q' || (c & 255) == 27 )
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|