OpenCV upper body and lower body detection.

[Cheetos]

Greetings, i am having problems with openCV face, upper body and lower body detection. in my code, i can only see the face detection, the rest it does not appear. what is wrong with my code?

This is my code:


#include <stdio.h>
#include "cv.h"
#include "highgui.h"
CvHaarClassifierCascade *cascade;
CvMemStorage *storage;
CvHaarClassifierCascade *upperbodyCascade;
CvMemStorage *upperbodyStorage;
CvHaarClassifierCascade *lowerbodyCascade;
CvMemStorage *lowerbodyStorage;
void detectFaces( IplImage *img );
void detectupperbody( IplImage *img );
void detectlowerbody( IplImage *img );
IplImage *bframe = 0;
IplImage *resframe=0;

int main( int argc, char** argv )
{
CvCapture *capture;
IplImage *frame;
int key;
char *filename = "haarcascade_frontalface_alt.xml";
char *upperbodyFilename ="haarcascade_fullbody.xml";
char *lowerbodyFilename ="haarcascade_lowerbody.xml";

/* load the classifier
note that I put the file in the same directory with
this code */
cascade = ( CvHaarClassifierCascade* )cvLoad( filename, 0, 0, 0 );
upperbodyCascade = ( CvHaarClassifierCascade* )cvLoad( upperbodyFilename, 0, 0, 0 );
lowerbodyCascade = ( CvHaarClassifierCascade* )cvLoad( lowerbodyFilename, 0, 0, 0 );


/* setup memory buffer; needed by the face detector */
storage = cvCreateMemStorage( 0 );
upperbodyStorage = cvCreateMemStorage( 0 );
lowerbodyStorage = cvCreateMemStorage( 0 );
/* initialize camera */
capture = cvCaptureFromCAM( 0 );
/* always check */
assert( cascade && storage && capture );
assert( upperbodyCascade && upperbodyStorage && capture );
assert( lowerbodyCascade && lowerbodyStorage && capture );

/* create a window */
cvNamedWindow( "video", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "upperbody", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "lowerbody",CV_WINDOW_AUTOSIZE );
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);
detectupperbody(frame);// FUNCTION IRE
detectlowerbody(frame); // FUNCTION IRE
/* quit if user press 'q' */
key = cvWaitKey( 10 );
}
/* free memory */
cvReleaseCapture( &capture );
cvDestroyWindow( "video" );
cvDestroyWindow( "upperbody" );
cvDestroyWindow( "lowerbody" );
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, 0, 0 ), 1, 8, 0 );

}



/* display video */

cvShowImage( "video", img );
}

void detectupperbody( IplImage *img1 )
{
int i;

/* detect faces */
CvSeq *body = cvHaarDetectObjects(
img1,
upperbodyCascade,
upperbodyStorage,
1.2,
2,
1/*CV_HAAR_DO_CANNY_PRUNNING*/,
cvSize( 0, 0 ) );

/* for each face found, draw a red box */
for( i = 0 ; i < ( body ? body->total : 0 ) ; i++ ) {
CvRect *r = ( CvRect* )cvGetSeqElem( body, i );
cvRectangle( img1,
cvPoint( r->x, r->y ),
cvPoint( r->x + r->width, r->y + r->height ),
CV_RGB( 255, 255, 255 ), 1, 8, 0 );
}


/* display video */
cvShowImage( "upperbody", img1 );
//cvWaitKey(30);
}
void detectlowerbody( IplImage *img1 )
{
int i;

/* detect faces */
CvSeq *body = cvHaarDetectObjects(
img1,
lowerbodyCascade,
lowerbodyStorage,
1.2,
2,
1/*CV_HAAR_DO_CANNY_PRUNNING*/,
cvSize( 1/4, 1/4 ) );


for( i = 0 ; i < ( body ? body->total : 0 ) ; i++ ) {
CvRect *r = ( CvRect* )cvGetSeqElem( body, i );
cvRectangle( img1,
cvPoint( r->x, r->y ),
cvPoint( r->x + r->width, r->y + r->height ),
CV_RGB( 0, 255,0 ), 1, 8, 0 );
}

/* display video */
cvShowImage( "lowerbody", img1 );
//cvWaitKey(30);
}

 

[paotorresballesteros]

Hi! Thank you for a great and very helpful post! :>

I followed your post and used it for eye detection only. An debug error is occurring as I debug it. The prompted message suggests to retry. And so that's what I did. A breakpoint message would then be prompted. When I clicked the "continue" button it would then prompt (through the command prompt) "Assertion failed: cascade && storage && capture, file c:\users\sony vaio\documents\visual studio 2010\project\eyetracker\eyetracker\eyetracker.cpp, line 52"

Here is my code. I hope you could help me. :|


#include <stdafx.h>
#include <stdio.h>
#include "cv.h"
#include "highgui.h"
#include <conio.h>
#include <math.h>
#include <assert.h>
#include <stdlib.h>
#include <float.h>
#include <limits.h>

CvHaarClassifierCascade *cascade;
CvMemStorage *storage;

void detecteyes( IplImage *img );

//int X;

//IplImage *resframe=0;

int main( int argc, char** argv ){
CvCapture *capture;
IplImage *frame;
int key;
char *filename = "haarcascade_eyes.xml";

// IplImage *bframe=0;


/* load the classifier
note that I put the file in the same directory with
this code */
// bframe = cvLoadImage("PICTURE.jpg",CV_LOAD_IMAGE_COLOR);
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 */
detecteyes(frame);

/* quit if user press 'q' */
key = cvWaitKey( 50 );
}
/* free memory */
cvReleaseImage(&frame);
cvReleaseCapture( &capture );
cvDestroyWindow( "video" );

cvReleaseHaarClassifierCascade( &cascade );

cvReleaseMemStorage( &storage );
return 0;
}

void detecteyes(IplImage* img)
{
int i,x;
x=0;

CvSeq *eyes = cvHaarDetectObjects(
img,
cascade,
storage,
1.1,
3,
0,
cvSize(10,10)


);

for( i=0; i < (eyes ? eyes->total : 0) ; i++){

CvRect *r = ( CvRect* )cvGetSeqElem( eyes, i );

cvRectangle( img,

cvPoint( r->x, r->y),
cvPoint( r->x + r->width, r->y + r->height ),
CV_RGB(255, 0, 0), 1, 8, 0);

x=x+1;
printf("eyes detected %d",x);
}
cvShowImage( "video", img );
}

 

[Cheetos]

maybe your haarcascade_eyes.xml is not on the same directory where your code is saved?

 

[paotorresballesteros]

I did that but it did not make any difference. Is there a chance that there is a problem in the directory for xml files? I mean this has happened to me before when I was still trying to get a feed from a webcam. The problem to that though was in the location of the debug directory. Is there a chance that this may have a similar problem but with regards to using xml files?

Thank you for the reply.

 

[Cheetos]

i compiled your code, it gave no errors. I tried to run it without a webcam, i received the same error as you did.

There are two things you can do to solve this problem

1. Get a new webcam and try the code
2. Try modifying the number in this part of the code capture = cvCaptureFromCAM(0);
try playing with 0,1,2,3 and so on.
if you use 0, openCV will use the first webcam installed in your computer
1, for second 2, for third and so on.

 

[paotorresballesteros]

I tried doing the things you said but unfortunately the problem still occurs. I tried putting a print function after the classifier loader to check whether or not it can load the .xml file. Through that I was able to justify that my program can now load the classifier. The problem still though is the assertion. When I run the program line per line, it showed an assertion failure, similar to the problem above. Now, I really don't have a clue anymore of what my problem is.

---------- Post added at 12:45 ---------- Previous post was at 12:39 ----------

I then tried to comment out first the assert line but breakpoints continue to prompt. When I clicked the break button, there was a message in the command prompt that states null array pointer is passed.