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@GrimTheReaper GrimTheReaper/main.cpp forked from nikotan/main.cpp
Created Aug 31, 2017

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face detection sample code for OpenCV
#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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