Face Detection pls help

palaksha

hey !! i am stuck up with code of face detection can anybody plss help me !! there is change in contrast and brightness once i run it !! i have added " haarcascade_frontalface_alt.xml " file to !!pls update me its urgent ! thanx in advance ! the code is

import hypermedia.video.*; import java.awt.Rectangle;

OpenCV opencv;

// contrast/brightness values int contrast_value = 0; int brightness_value = 0;

void setup() {

size( 320, 240 );

opencv = new OpenCV( this );
opencv.capture( width, height );                   // open video stream
opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT);  // / load detection description, here-> front face detection : "haarcascade_frontalface_alt.xml"




// print usage
println( "Drag mouse on X-axis inside this sketch window to change contrast" );
println( "Drag mouse on Y-axis inside this sketch window to change brightness" );

}

public void stop() { opencv.stop(); super.stop(); }

void draw() {

// grab a new frame
// and convert to gray
opencv.read();
opencv.convert( GRAY );
opencv.contrast( contrast_value );
opencv.brightness( brightness_value );

// proceed detection
Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );

// display the image
image( opencv.image(), 0, 0 );

// draw face area(s)
noFill();
stroke(255,0,0);
for( int i=0; i<faces.length; i++ ) {
    rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height ); 
}

}

/** * Changes contrast/brigthness values */ void mouseDragged() { contrast_value = (int) map( mouseX, 0, width, -128, 128 ); brightness_value = (int) map( mouseY, 0, width, -128, 128 ); }