[Processing匯入OpneCV視覺函式庫] 臉孔追蹤小專題

import gab.opencv.*;
import processing.video.*;
import java.awt.*;
import processing.serial.*;
import cc.arduino.*;

int center_x, center_y;
Arduino arduino;

Capture video;
OpenCV opencv;

void setup() {
  size(640, 480);  
  video = new Capture(this, 640/2, 480/2);
  opencv = new OpenCV(this, 640/2, 480/2);
  opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);  
  println(Arduino.list());

  arduino = new Arduino(this, Arduino.list()[0], 57600); 
  //0代表第一個COM裝置，請根據實際狀況修改
  arduino.pinMode(9, Arduino.SERVO);     //#1 servo 水平
  arduino.pinMode(11, Arduino.SERVO);   //#2 servo 垂直
  video.start();
}

void draw() {
  scale(2);
  opencv.loadImage(video);

  image(video, 0, 0 );

  noFill();
  stroke(0, 255, 0);
  strokeWeight(2);
  Rectangle[] faces = opencv.detect();   //偵測是否有臉
  println(faces.length);                            //偵測到幾張臉

  for (int i = 0; i < faces.length; i++) {    //根據臉孔數目來跑迴圈
    println(faces[i].x + "," + faces[i].y);    //顯示臉的座標
    rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height); //畫長方形把臉框出來
    center_x = faces[i].x + (faces[i].width/2);   //起始點x + 0.5*寬
    center_y = faces[i].y + (faces[i].height /2);  //起始點y + 0.5*高
    print(center_x); 
    print(", "); 
    println(center_y);
    ellipse(center_x, center_y, 10, 10);
    arduino.servoWrite(9, int(map(center_x, 100, 270, 0, 180)));  
    //本組數值是center_x 於畫面之左右極值，需依照實際情況調整
    arduino.servoWrite(11, int(map(center_y, 80, 250, 0, 180)));  
    //本組數值是center_y 於畫面的上下極值，需依照實際情況調整
  }
  delay(100);
}

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