Simulating long exposure shots on Processing

Hello everyone,

I am trying to create a sketch that simulates a long exposure shot captured on camera. I searched for smth similar on the web and found this reference which proposes to append different layers using different opacities. I did that with the following code, but it doesn't seem to quite do the job properly.

Anybody tried to do that before?

Any other suggestions?

Thanks for your time! :-)

// This patch proposes to simulate a long exposure shot using Processing.

import processing.video.*;

Capture video;

void setup() {
  size(640, 480);
  printArray(Capture.list());
  video = new Capture(this, 640, 480, 30);
  video.start();
}

void mousePressed()
{
  int steps = 10;  // also means amount of pictures taken and merged later
  long opac = 255 / steps;

  for (int i = 1; i <= steps; i++)
  {
    if (video.available())
    {
      video.read();
      image(video, 0, 0);
      tint(255, opac * i);    // changes the opacity every step
      delay (100);            // delay between each step
      print(i);
      println(" " + opac * i);
    }
  }
}

void keyPressed()
{
  background(0);
}

void draw() {
  // Step 5. Display the video image.
}