Last night, Robert Nyman hosted yet another successful Geekmeet in Stockholm. I got one of the lightning talk slots and decided to skip my planned presentation and instead show some of my experiments with slit-scan photography. The presentation slides (in swedish) are available (8 Mb PDF) here. For more pictures see the set Slit-scan I over at flickr.

The processing code for time lapse captures through the iSight camera with a static centered slit looks like this:

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import processing.video.*;
Capture cameraSource; 
int capwidth = 1280; 
int capheight = 1024; 
int outwidth = 1024;

int currentColumn = 0;
boolean keepDrawing = false; boolean isDone = false;

void setup() { 
  size(outwidth, capheight); 
  cameraSource = new Capture(this, capwidth, capheight, 30); 
  cameraSource.crop(capwidth/2, 0, 1, capheight); 
}

void captureEvent(Capture cameraSource) { 
  if(cameraSource.available()) { cameraSource.read(); } 
}

void keyPressed() { 
  keepDrawing = true; isDone = false; 
}

void draw() { 
  if(keepDrawing) { 
    if(currentColumn<=width) {
      image(cameraSource, currentColumn, 0); currentColumn++; 
    } else { 
      keepDrawing = false; 
      isDone = true; 
      saveImage(); 
      currentColumn = 0; 
    } 
  } 
}

void saveImage() { //yeah I know...
  String d = String.valueOf(day()); 
  String m = String.valueOf(month()); 
  String y = String.valueOf(year()); 
  String h = String.valueOf(hour()); 
  String mn = String.valueOf(minute()); 
  String s = String.valueOf(second());
  save("scan" + y + m + d + "-" + h + mn + s + ".png"); 
}