separation main et fonctions

Code/facedetect.c

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+// Sample Application to demonstrate how Face detection can be done as a part of your source code.
+
+// Include header files
+#include "cv.h"
+#include "highgui.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <math.h>
+#include <float.h>
+#include <limits.h>
+#include <time.h>
+#include <ctype.h>
+
+
+// Create a string that contains the exact cascade name
+const char* cascade_name =
+"C:/Program Files/OpenCV/data/haarcascades/haarcascade_frontalface_alt.xml";
+/*    "haarcascade_profileface.xml";*/
+
+
+// Function prototype for detecting and drawing an object from an image
+void detect_and_draw( IplImage* image );
+
+// Main function, defines the entry point for the program.
+int main( int argc, char** argv )
+{
+
+  //Ouverture flux camera
+  CvCapture* capture = cvCaptureFromCAM( 0 );
+    
+  if( !capture ){
+  	printf("ERROR: capture is NULL \n" );
+  	exit(EXIT_FAILURE);
+  }
+
+// Call the function to detect and draw the face positions
+detect_and_draw(img);
+
+// Wait for user input before quitting the program
+cvWaitKey();
+
+// Release the image
+cvReleaseImage(&img);
+
+// Destroy the window previously created with filename: "result"
+cvDestroyWindow("result");
+
+// return 0 to indicate successfull execution of the program
+return 0;
+}
+
+// Function to detect and draw any faces that is present in an image
+void detect_and_draw( IplImage* img )
+{
+
+// Create memory for calculations
+static CvMemStorage* storage = 0;
+
+// Create a new Haar classifier
+static CvHaarClassifierCascade* cascade = 0;
+
+int scale = 1;
+
+// Create a new image based on the input image
+IplImage* temp = cvCreateImage( cvSize(img->width/scale,img->height/scale), 8, 3 );
+
+// Create two points to represent the face locations
+CvPoint pt1, pt2;
+int i;
+
+// Load the [[HaarClassifierCascade]]
+cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
+
+// Check whether the cascade has loaded successfully. Else report and error and quit
+if( !cascade )
+{
+fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
+return;
+}
+
+// Allocate the memory storage
+storage = cvCreateMemStorage(0);
+
+// Create a new named window with title: result
+cvNamedWindow( "result", 1 );
+
+// Clear the memory storage which was used before
+cvClearMemStorage( storage );
+
+// Find whether the cascade is loaded, to find the faces. If yes, then:
+if( cascade )
+{
+
+// There can be more than one face in an image. So create a growable sequence of faces.
+// Detect the objects and store them in the sequence
+CvSeq* faces = cvHaarDetectObjects( img, cascade, storage,
+1.1, 2, CV_HAAR_DO_CANNY_PRUNING,
+cvSize(40, 40) );
+
+// Loop the number of faces found.
+for( i = 0; i < (faces ? faces->total : 0); i++ )
+{
+// Create a new rectangle for drawing the face
+CvRect* r = (CvRect*)cvGetSeqElem( faces, i );
+
+// Find the dimensions of the face,and scale it if necessary
+pt1.x = r->x*scale;
+pt2.x = (r->x+r->width)*scale;
+pt1.y = r->y*scale;
+pt2.y = (r->y+r->height)*scale;
+
+// Draw the rectangle in the input image
+cvRectangle( img, pt1, pt2, CV_RGB(255,0,0), 3, 8, 0 );
+}
+}
+
+// Show the image in the window named "result"
+cvShowImage( "result", img );
+
+// Release the temp image created.
+cvReleaseImage( &temp );
+}