缩放Kinect输入（检测到的silhuette）以匹配16：9的分辨率

Question

我正在进行基于backgorund和前景视频的实时投影。前景视频应该被投射到在kinect前面跳舞的人身上。

目前，我正在努力扩展此设置。显然，处理草图的输出需要全屏。视频的分辨率为1280x720。

这是源代码：

import processing.video.*;
import SimpleOpenNI.*;

// Member
SimpleOpenNI context;
int[] userMap;
PImage rgbImage;
PImage userImage;
color pixelColor;
Movie foreground;
Movie background;

void setup() {
  size(640, 480);
  //frame.setResizable(true);
  // initialize kinect
  context = new SimpleOpenNI(this);
  context.enableRGB();
  context.enableDepth();
  context.enableUser();
  // initialize user image and videos
  userImage = createImage(width, height, RGB);
  foreground = new Movie(this, "foreground.mp4");
  foreground.loop();
  //foreground.play();
  background = new Movie (this, "background.mp4");
  background.loop();
  //background.play();

  //println("foreground length : " + foreground.pixels.length);
  // background length is 0 on the very first frame
  //println("background length : " + background.pixels.length);
}

void draw() {
  // draw foreground
  image(foreground, 0, 0);

  context.update();
  rgbImage=context.rgbImage();

  userMap=context.userMap();
  for(int y=0;y<context.depthHeight();y++){
    for(int x=0;x<context.depthWidth();x++){
      // use silhuette to cut out foreground movie
      int index=x+y*640;
      if(userMap[index]!=0){
          pixelColor=rgbImage.pixels[index];
        userImage.pixels[index]=color(0,255, 0 , 0);
      }else{
        //userImage.pixels[index] = color(255);
        // the first frame of the second movie is not read on the very first frame !!!
        if(frameCount > 1){
          // -> index out of bounds exception if frameCount == 0
          userImage.pixels[index] = background.pixels[index];
        }
      }
    }
  }
  // display the result
  userImage.updatePixels();
  image(userImage,0,0);
}

// read both movies
void movieEvent(Movie m){
  if(m == foreground){
   foreground.read();
  }
  if (m == background){
    background.read();
  }
}

将此扩展到HD FullScreen的最合理或最佳方法是什么？ kinect的比例是4：3，这让它有点不舒服。