Processing入門 Java編5: メディア

Capture
https://processing.org/reference/libraries/video/Capture.html

image()
https://processing.org/reference/image_.html

OpenCV for Processing
https://github.com/atduskgreg/opencv-processing

Rectangle
https://docs.oracle.com/javase/jp/17/docs/api/java.desktop/java/awt/Rectangle.html

新・Java入門編12: 条件分岐を理解しよう
https://paiza.jp/works/java/new-primer/java-new-primer-12

新・Java入門編11: 拡張for文を学習しよう
https://paiza.jp/works/java/new-primer/java-new-primer-11

import processing.video.*;

void setup() {
  size(640, 480);
}

void draw() {
}

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

Capture camera;
OpenCV opencv;

void setup() {
  size(640, 480);
  
  String[] cameras = Capture.list();
  camera = new Capture(this, 640, 480, cameras[0]);
  camera.start();
  
  opencv = new OpenCV(this, 640, 480);
  opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE); 
}

void draw() {

  opencv.loadImage(camera);

  image(camera, 0, 0);

  Rectangle[] faces = opencv.detect();
  for (Rectangle face : faces) {
    rect(face.x, face.y, face.width, face.height);
  }
}

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