import hypermedia.video.*;


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"
    opencv.cascade( "C:\\Program Files\\OpenCV\\data\\haarcascades\\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.cascade( "C:\\Program Files\\OpenCV\\data\\haarcascades\\haarcascade_frontalface_alt.xml" );
    opencv.read();
    opencv.convert( GRAY );
    opencv.contrast( contrast_value );
    opencv.brightness( brightness_value );

    // display the image
    image( opencv.image(), 0, 0 );
    // draw face area(s)
    noFill();
    stroke(255,0,0);
    
    // proceed face detection
    Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );
    
    if ( faces.length > 0 ) {
    opencv.ROI( faces[0].x, faces[0].y+(faces[0].height/5), faces[0].width, faces[0].height/3 );
    opencv.cascade( "C:\\Program Files\\OpenCV\\data\\haarcascades\\haarcascade_eye.xml");
    Rectangle[] eyes = opencv.detect();
    opencv.ROI(null);
    for( int i=0; i<faces.length; i++ ) {
	  rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height ); 
    }
    stroke(0,255,0);
    fill(0);
    for( int i=0; i<eyes.length; i++ ) {
	   rect( eyes[i].x+faces[0].x, eyes[i].y+faces[0].y+(faces[0].height/5), eyes[i].width, eyes[i].height );  
	}
}
delay(100);
}


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