mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
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87 lines
3.3 KiB
87 lines
3.3 KiB
15 years ago
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#include <OpenCV/OpenCV.h>
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#include <cassert>
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#include <iostream>
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const char * WINDOW_NAME = "Face Tracker";
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const CFIndex CASCADE_NAME_LEN = 2048;
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char CASCADE_NAME[CASCADE_NAME_LEN] = "~/opencv/data/haarcascades/haarcascade_frontalface_alt2.xml";
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using namespace std;
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int main (int argc, char * const argv[])
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{
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const int scale = 2;
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// locate haar cascade from inside application bundle
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// (this is the mac way to package application resources)
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CFBundleRef mainBundle = CFBundleGetMainBundle ();
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assert (mainBundle);
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CFURLRef cascade_url = CFBundleCopyResourceURL (mainBundle, CFSTR("haarcascade_frontalface_alt2"), CFSTR("xml"), NULL);
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assert (cascade_url);
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Boolean got_it = CFURLGetFileSystemRepresentation (cascade_url, true,
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reinterpret_cast<UInt8 *>(CASCADE_NAME), CASCADE_NAME_LEN);
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if (! got_it)
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abort ();
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// create all necessary instances
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cvNamedWindow (WINDOW_NAME, CV_WINDOW_AUTOSIZE);
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CvCapture * camera = cvCreateCameraCapture (CV_CAP_ANY);
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CvHaarClassifierCascade* cascade = (CvHaarClassifierCascade*) cvLoad (CASCADE_NAME, 0, 0, 0);
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CvMemStorage* storage = cvCreateMemStorage(0);
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assert (storage);
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// you do own an iSight, don't you ?!?
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if (! camera)
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abort ();
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// did we load the cascade?!?
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if (! cascade)
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abort ();
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// get an initial frame and duplicate it for later work
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IplImage * current_frame = cvQueryFrame (camera);
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IplImage * draw_image = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 3);
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IplImage * gray_image = cvCreateImage(cvSize (current_frame->width, current_frame->height), IPL_DEPTH_8U, 1);
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IplImage * small_image = cvCreateImage(cvSize (current_frame->width / scale, current_frame->height / scale), IPL_DEPTH_8U, 1);
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assert (current_frame && gray_image && draw_image);
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// as long as there are images ...
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while (current_frame = cvQueryFrame (camera))
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{
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// convert to gray and downsize
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cvCvtColor (current_frame, gray_image, CV_BGR2GRAY);
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cvResize (gray_image, small_image, CV_INTER_LINEAR);
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// detect faces
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CvSeq* faces = cvHaarDetectObjects (small_image, cascade, storage,
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1.1, 2, CV_HAAR_DO_CANNY_PRUNING,
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cvSize (30, 30));
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// draw faces
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cvFlip (current_frame, draw_image, 1);
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for (int i = 0; i < (faces ? faces->total : 0); i++)
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{
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CvRect* r = (CvRect*) cvGetSeqElem (faces, i);
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CvPoint center;
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int radius;
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center.x = cvRound((small_image->width - r->width*0.5 - r->x) *scale);
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center.y = cvRound((r->y + r->height*0.5)*scale);
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radius = cvRound((r->width + r->height)*0.25*scale);
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cvCircle (draw_image, center, radius, CV_RGB(0,255,0), 3, 8, 0 );
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}
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// just show the image
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cvShowImage (WINDOW_NAME, draw_image);
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// wait a tenth of a second for keypress and window drawing
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int key = cvWaitKey (100);
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if (key == 'q' || key == 'Q')
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break;
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}
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// be nice and return no error
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return 0;
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}
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