Apa itu OpenCV? OpenCV (open source computer vision) merupakan library pemrograman untuk pengolahan citra secara real time yang biasa diaplikasikan pada robotika atau alat elektronik lainnya seperti kamera, Ipad, dll untuk digunakan sebagai pendeteksi wajah maupun pengenalan objek. Saat ini OpenCV telah dipakai oleh banyak perusahaan-perusahaan besar dan masih terus dikembangkan.
Selanjutnya saya akan mencoba membuat program pendeteksi wajah dengan openCV + Codeblocks, berikut script programnya:
#include "stdio.h"
#include "cv.h"
#include "highgui.h"
CvHaarClassifierCascade *cascade;
CvMemStorage *storage;
void detectFaces( IplImage *img );
int main( int argc, char** argv )
{
CvCapture *capture;
IplImage *frame;
int key;
char *filename = "haarcascade_frontalface_default.xml";
/* load the classifier
note that I put the file in the same directory with
this code */
cascade = ( CvHaarClassifierCascade* )cvLoad( filename, 0, 0, 0 );
/* setup memory buffer; needed by the face detector */
storage = cvCreateMemStorage( 0 );
/* initialize camera */
capture = cvCaptureFromCAM( 0 );
/* always check */
assert( cascade && storage && capture );
/* create a window */
cvNamedWindow( "video", 1 );
while( key != 'q' ) {
/* get a frame */
frame = cvQueryFrame( capture );
/* always check */
if( !frame ) break;
/* 'fix' frame */
cvFlip( frame, frame, 1 );
frame->origin = 0;
/* detect faces and display video */
detectFaces( frame );
/* quit if user press 'q' */
key = cvWaitKey( 10 );
}
/* free memory */
cvReleaseCapture( &capture );
cvDestroyWindow( "video" );
cvReleaseHaarClassifierCascade( &cascade );
cvReleaseMemStorage( &storage );
return 0;
}
void detectFaces( IplImage *img )
{
int i;
/* detect faces */
CvSeq *faces = cvHaarDetectObjects(
img,
cascade,
storage,
1.1,
3,
0 /*CV_HAAR_DO_CANNY_PRUNNING*/,
cvSize( 40, 40 ) );
/* for each face found, draw a red box */
for( i = 0 ; i < ( faces ? faces->total : 0 ) ; i++ ) {
CvRect *r = ( CvRect* )cvGetSeqElem( faces, i );
cvRectangle( img,
cvPoint( r->x, r->y ),
cvPoint( r->x + r->width, r->y + r->height ),
CV_RGB( 255, 128, 0 ), 3, 8, 0 );
}
/* display video */
cvShowImage( "video", img );
}
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.