How to Fullscreen Window a LowRes Webcam and Background Remove live ? No so easy as its sounds..

jota

I am using this code to achieve Background Remove in processing:

https://github.com/shiffman/LearningProcessing/blob/master/chp16_video/example_16_12_BackgroundRemove/example_16_12_BackgroundRemove.pde#L1

Which works like a charm. WHAT I WANT TO is that Processing window becomes FULL SCREEN simultaneously.

But, things is, when I try to change the size of the window Processing warms me that:

The requested resolution of "x" is not supported by the selected capture device.

or in other franksteinian mixing codes I tried (which one are a shame to show) things like: ArrayIndexOutOfBoundsException> or Could not run the sketch (Target VM failed to initialize).> And in the best of the cases a get the same video image repeating through the width. I tried what its discussed here:

http://forum.processing.org/two/discussion/10894/how-do-i-resize-the-output-of-my-capture-video

Trying to adapt the code to my case, but seems like the line

 color bgColor = backgroundImage.pixels[loc];

awake some error.

Thanks in advance, I am getting crazy with this easy trouble!

GoToLoop

AFAIK, in order to know which cameras and resolutions are available, we use:
printArray(Capture.list());

Take a look at this recent forum thread:
http://forum.processing.org/two/discussion/10541/problems-with-video

There are some resize() techniques there! B-)

jota

Well, first of all, thanks for taking the time! I already checked that thread but I tryed again after you wrote it.

I have to say that I can make that Capture becomes FullScreen, but not at the same time I am removing the background...maybe too many data to process?

This is my initial code to remove background:

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Exercise 16-6: Instead of replacing the background with green pixels,           replace it with another 
// image. What values work well for threshold and what values do not work at all? Try 
// controlling the threshold variable with the mouse.   


// Click the mouse to memorize a current background image
import processing.video.*;

    // Variable for capture device
Capture video;

// Saved background
PImage backgroundImage;

PImage backgroundReplace;

// How different must a pixel be to be a foreground pixel
float threshold = 80;

void setup() {
  size(640, 480);
 video = new Capture(this, width, height, 30);
  video.start();

  // Create an empty image the same size as the video
  backgroundImage = createImage(video.width, video.height, RGB);
  backgroundReplace = loadImage("beach.jpg");
}

// New frame available from camera
void captureEvent(Capture video) {
  video.read();
}


void draw() {


  // We are looking at the video's pixels, the memorized backgroundImage's     pixels, as well as accessing the display pixels. 
  // So we must loadPixels() for all!
  loadPixels();
  video.loadPixels(); 
  backgroundImage.loadPixels();

  // Begin loop to walk through every pixel
  for (int x = 0; x < video.width; x ++ ) {
    for (int y = 0; y < video.height; y ++ ) {
      int loc = x + y*video.width; // Step 1, what is the 1D pixel location
      color fgColor = video.pixels[loc]; // Step 2, what is the foreground color

      // Step 3, what is the background color
      color bgColor = backgroundImage.pixels[loc];

      // Step 4, compare the foreground and background color
      float r1 = red(fgColor);
      float g1 = green(fgColor);
      float b1 = blue(fgColor);
      float r2 = red(bgColor);
      float g2 = green(bgColor);
      float b2 = blue(bgColor);
      float diff = dist(r1, g1, b1, r2, g2, b2);

      // Step 5, Is the foreground color different from the background color
      if (diff > threshold) {
        // If so, display the foreground color
        pixels[loc] = fgColor;
      } else {
        // If not, display the beach scene
        pixels[loc] = backgroundReplace.pixels[loc];
      }
    }
  }
  updatePixels();
}

void mousePressed() {
  // Copying the current frame of video into the backgroundImage object
  // Note copy takes 5 arguments:
  // The source image
  // x,y,width, and height of region to be copied from the source
  // x,y,width, and height of copy destination
  backgroundImage.copy(video, 0, 0, video.width, video.height, 0, 0,     video.width, video.height);
  backgroundImage.updatePixels();
}

So I edited the line 26 inside void setup about the video, like this:

 video = new Capture(this);

So now give me this error: (java.exe:6624): GStreamer-CRITICAL **: _gst_util_uint64_scale_int: assertion `denom > 0' failed

To infinity. And inside void draw, highlight the line 56 :

      color bgColor = backgroundImage.pixels[loc];

How make fullscreen (THE SKETCH WINDOW, not just the video) the Removal Background from a webcam?