Détéction des point d'interet pour une main en 2D

#include <cv.h> 
#include <highgui.h>
#include <math.h>
#include <stdio.h>

IplImage*	image_model = NULL;
IplImage*	image_nvg = NULL;
CvMemStorage* 	image_stocké = NULL;


void Contour(int)
{
	if( image_stocké == NULL )
	{
		image_nvg = cvCreateImage( cvGetSize( image_model ), 8, 1 );
		image_stocké = cvCreateMemStorage(0);
	} else 
	{
		cvClearMemStorage( image_stocké );

	}
	CvSeq* contours = 0;
	cvCvtColor( image_model, image_nvg, CV_BGR2GRAY );
	cvFindContours( image_nvg, image_stocké, &contours );
	cvZero( image_nvg );
	if( contours )
	{
		cvDrawContours(	image_nvg,	contours,cvScalarAll(255),cvScalarAll(255),100 );
	}
	cvNamedWindow("Test");  
    IplImage *eig_image, *temp_image;   
    eig_image = cvCreateImage(cvGetSize(image_nvg), IPL_DEPTH_32F, 1); 
    temp_image = cvCloneImage(eig_image); 	
    CvPoint2D32f *points = new CvPoint2D32f[300];
    int nb_points = 300;
    IplImage *maskImage = cvLoadImage("mask.bmp");
    IplImage *tempMask = cvCreateImage(cvGetSize(maskImage), IPL_DEPTH_8U, 1);
    cvConvertImage(maskImage, tempMask);
    CvMat* mask = cvCreateMat( 480, 640, CV_8UC1 );
    mask = cvGetMat(tempMask, mask);
    cvGoodFeaturesToTrack( image_nvg, eig_image, temp_image, points, &nb_points, 0.1, 0.04, mask);
    cvReleaseImage(&eig_image);
    cvReleaseImage(&temp_image);
	for (int i=0; i<nb_points; i++)
	{
		CvPoint centre = cvPointFrom32f(points[i]);	
		cvCircle(image_nvg, centre, 4, CV_RGB(255, 255,255));
	}
cvShowImage("Test", image_nvg);
cvSaveImage("e:/Test.bmp",image_nvg);
cvReleaseImage(&image_nvg);
cvWaitKey();
cvDestroyAllWindows();
delete points;
}


int main(int argc, char* argv[])
{
	image_model = cvLoadImage( "Image model.bmp" );
	int flip=0;
	if(image_model->origin!=IPL_ORIGIN_TL)
	{
	 flip=CV_CVTIMG_FLIP;
	}
	Contour(1);
	return 0;
}