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Index › Programming Questions & Help › Syntax Questions › how to get colors from image into noisegrid
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how to get colors from image into noisegrid? (Read 984 times)
holger
how to get colors from image into noisegrid?
Sep 17th, 2009, 1:41am  
hi, how can i get each point with the color of the picture position within this noisegrig?
here what i have:

Code:
PImage img;
int ii,x,y;
float i,j;
void setup()
{
  size(310,310);
  img=loadImage("g.jpg");
  background(255);    
  smooth();
}

void draw(){
  float getcol = map(mouseX, 0, width, 2, 78);
  int xx = int(random(img.width));
  int yy = int(random(img.height));
  color col = img.get(xx, yy);
  noStroke();
  fill(col);
  for(x=1;x<60;x++)
  
    for(y=1;y<60;y++)

  ellipse(x*5+n(mouseX+10)*1.5,y*5+n(mouseY-10)*1.5,n(0),n(0));
  i++;
  noLoop();
}
float n(int k){
  return noise(x*0.1+k,y*0.1,i*0.03)*7;
}
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PhiLho 
Re: how to get colors from image into noisegrid?
Reply #1 - Sep 17th, 2009, 2:11am  
Something like:
Code:
void draw(){
  noStroke();
  for(x=1;x<60;x++)
  
    for(y=1;y<60;y++)
    {
      color col = img.get(x * 5, y * 5);
      fill(col);

      ellipse(x*5+n(mouseX+10)*1.5,y*5+n(mouseY-10)*1.5,n(0),n(0));
    }
  noLoop();
}
Questioning
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holger
Re: how to get colors from image into noisegrid?
Reply #2 - Sep 17th, 2009, 2:24am  
great! thank you!!! ..it looks like it would first determine the image color grid and later deform it with the noisefield. exactly what i was looking for:) ...shure it needs the same *5 value!
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holger
Re: how to get colors from image into noisegrid?
Reply #3 - Sep 18th, 2009, 2:36am  
hi PhiLho,
i made some experiments with that script and figured out that it would  be another interesting improvement when one could adjust something like a depth, looking like this (i made with photoshop) http://www.flickr.com/photos/lumicon/3929130043/
i tried to make it as pseudo depth with smaller point for each line, but i would also have to diminuish the size of the noisegrid, ...no idea how to do that.
would be nice if you could help. Cry
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PhiLho 
Re: how to get colors from image into noisegrid?
Reply #4 - Sep 21st, 2009, 4:12am  
I first tried to change the spacing/size of ellipses by using some kind of geometrical suite, but it might be clumsy/hard to adjust.
So I looked how to make a perspective transformation, I found an algorithm, but I still need some time (in parallel to other stuff) to write something using it.

If I remain silent too long, just bump up this thread, it will remind me to work on this! Wink (as I find the problem interesting in itself).
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holger
Re: how to get colors from image into noisegrid?
Reply #5 - Sep 25th, 2009, 3:51am  
thats really nice! ...i searched for some useful ways to realize it, found this:
http://www.openprocessing.org/visuals/?visualID=2245
here it is made with a z axis turn, looks pretty crazy (to me;), didn't do any 3d processing, will look at it closer.
a bien tôt
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