Created
March 31, 2015 14:39
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OpenCV Face detection
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#include <opencv/cv.h> | |
#include <opencv/highgui.h> | |
#include <opencv/ml.h> | |
void doMosaic(IplImage* in, int x, int y, | |
int width, int height, int size); | |
int main (int argc, char **argv) | |
{ | |
int i, c; | |
IplImage *src_img = 0, *src_gray = 0; | |
const char *cascade_name = "/opt/local/share/opencv/haarcascades/haarcascade_frontalface_default.xml"; | |
CvHaarClassifierCascade *cascade = 0; | |
CvMemStorage *storage = 0; | |
CvSeq *faces; | |
cascade = (CvHaarClassifierCascade *) cvLoad (cascade_name, 0, 0, 0); | |
cvNamedWindow ("Capture", CV_WINDOW_AUTOSIZE); | |
CvCapture *capture = cvCreateCameraCapture(0); | |
assert(capture != NULL); | |
while (1) { | |
src_img = cvQueryFrame (capture); | |
src_gray = cvCreateImage (cvGetSize(src_img), IPL_DEPTH_8U, 1); | |
storage = cvCreateMemStorage (0); | |
cvClearMemStorage (storage); | |
cvCvtColor (src_img, src_gray, CV_BGR2GRAY); | |
cvEqualizeHist (src_gray, src_gray); | |
faces = cvHaarDetectObjects (src_gray, cascade, storage, | |
1.11, 4, 0, cvSize (40, 40)); | |
for (i = 0; i < (faces ? faces->total : 0); i++) { | |
CvRect *r = (CvRect *) cvGetSeqElem (faces, i); | |
doMosaic(src_img, r->x, r->y, r->width, r->height, 20); | |
} | |
cvShowImage("Capture", src_img); | |
cvReleaseImage(&src_gray); | |
c = cvWaitKey (2); | |
if (c == '\x1b') | |
break; | |
} | |
cvReleaseCapture (&capture); | |
cvDestroyWindow ("Capture"); | |
return 0; | |
} | |
void doMosaic(IplImage* in, int x0, int y0, | |
int width, int height, int size) | |
{ | |
int b, g, r, col, row; | |
int xMin = size*(int)floor((double)x0/size); | |
int yMin = size*(int)floor((double)y0/size); | |
int xMax = size*(int)ceil((double)(x0+width)/size); | |
int yMax = size*(int)ceil((double)(y0+height)/size); | |
for(int y=yMin; y<yMax; y+=size){ | |
for(int x=xMin; x<xMax; x+=size){ | |
b = g = r = 0; | |
for(int i=0; i<size; i++){ | |
if( y+i > in->height ){ | |
break; | |
} | |
row = i; | |
for(int j=0; j<size; j++){ | |
if( x+j > in->width ){ | |
break; | |
} | |
b += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3]; | |
g += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3+1]; | |
r += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3+2]; | |
col = j; | |
} | |
} | |
row++; | |
col++; | |
for(int i=0;i<row;i++){ | |
for(int j=0;j<col;j++){ | |
in->imageData[in->widthStep*(y+i)+(x+j)*3] = cvRound((double)b/(row*col)); | |
in->imageData[in->widthStep*(y+i)+(x+j)*3+1] = cvRound((double)g/(row*col)); | |
in->imageData[in->widthStep*(y+i)+(x+j)*3+2] = cvRound((double)r/(row*col)); | |
} | |
} | |
} | |
} | |
} |
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