GMU:Eval(nature)/Andre Faupel: Difference between revisions

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==Pixel Motion Detection -- File Input ==
Sein und Nichtsein, das ist immer die Antwort.


<pre style="font=2">
== Idee ==
import processing.video.*;
Movie cam;
PImage save, out;


//// threshold for fine-tuning and artefacts
float thresh = 2;


void setup() {


== Hintergrund ==


  ///change to your footage path
  cam = new Movie(this, "E:/vids/MVI_5018.MOV");




  cam.loop();
== Skizze ==
  cam.jump(random(cam.duration()));
  cam.volume(0);
 
 
  // set windows size to match footage resolution
  size(cam.width, cam.height);
 


  ///setup previous frame and output-image
  save = createImage(1280, 720, RGB);
  out = createImage(1280, 720, RGB);
}


void draw() {
[[Image:Af_bioart_tmp.png|700px]]


  loadPixels();
  motiondetect();


  out.updatePixels();
  image(out, 0, 0, width, height);
}




void motiondetect() {


  cam.loadPixels();
  save.loadPixels();




  ///scann through input pixels
  for (int x = 0; x < cam.width; x ++ ) {
    for (int y = 0; y < cam.height; y ++ ) {
      int loc = y*cam.width+x;   
      color c = cam.pixels[loc];     
      color c_l = save.pixels[loc];


      ///get colors of each pxl
      float r = red(c);
      float g = green(c);
      float b = blue(c);
      ///get colors of each pxl -> prev frame
      float r_l = red(c_l);
      float g_l = green(c_l);
      float b_l = blue(c_l);


      ///compare
      float dif = dist(r, g, b, r_l, g_l, b_l);


      ///exchange pxls to make change visible
== Misc ==
      if (dif>thresh) {
        out.pixels[loc] = color (abs(r-r_l), abs(g-g_l), abs(b-b_l));
      } else {
        out.pixels[loc] = color (0);
      }
    }
  }
}


 
[http://www.uni-weimar.de/medien/wiki/images/Drops_evalnature_color_trails.zip sketch for visual juicing]
void movieEvent(Movie m) {
[[File:Af_drops_simple_trails.png|720px|thumb|left|trails]]
 
[[File:Af_drops_color_corr.png|560px|thumb|left|color correction]]
  ///get cam image and copy as previous frame
  if (m.available()) {
    save = m.get();
    save.updatePixels();
    m.read();
  }
}
 
 
 
 
 
</pre>

Latest revision as of 17:06, 16 June 2015

Sein und Nichtsein, das ist immer die Antwort.

Idee

Hintergrund

Skizze

Af bioart tmp.png






Misc

sketch for visual juicing

trails
color correction