OpenCV kill old Faces loop

corbinyo

Hi there, I am using openCV and face detection to control the transparency of images. The position of the detected face on the x axis controls transparency. What I would like to do is be able to ignore the other faces that get picked up by the webcam. Is there a way to get the value of face 1 and ignore face 2, face 3, face 4 etc., but upon face 1 being killed, make face 2 = face 1, face 3 = face 2 etc., and constantly only use the data from face 1 as the controlling parameter?

I have looked into the OpenCV example (Example: Whichface) and I can't seem to wrangle it to what i need it for. Here is my existing code

    import gab.opencv.*;
    import processing.video.*;
    import java.awt.*;

    Capture video;
    OpenCV opencv;

    PImage ed;
    PImage genie;
    int offset = 0;

    float easing = 0.05;

    void setup() {

    size(724,960);


      video = new Capture(this, 640/2, 480/2);
      opencv = new OpenCV(this, 640/2, 480/2);
      opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);  
      video.start();
      ed = loadImage("ed.jpg");
      genie = loadImage("genie.jpg");

    }




    void draw() {

      scale(1);
      opencv.loadImage(video);

      noFill();
      stroke(0, 255, 0);
      strokeWeight(3);

       Rectangle[] faces = opencv.detect();
      println(faces.length);




    for (int i = 0; i < faces.length; i++) {



 tint(255, 230);  // Display at half opacity
image(genie, 0, 0);  // Display at full opacity


  int dx = (faces[i].x-genie.width/2) - offset;
  offset += dx * easing;
  tint(255, faces[i].x);  // Display at half opacity
  image(ed, 0, 0);



   }
} 





void captureEvent(Capture c) {
  c.read();
}

josephh

Hi, You could simply say :

if( faces.length == 1){

   tint(255, 230);  // Display at half opacity
   image(genie, 0, 0);  // Display at full opacity
 
 
  int dx = (faces[0].x-genie.width/2) - offset;
  offset += dx * easing;
  tint(255, faces[0].x);  // Display at half opacity
  image(ed, 0, 0);
 
 }