PImage miImagen;

void setup(){
  size(500, 500);
  miImagen = loadImage("VanGogh-self-portrait-dedicated_to_gaugin.jpg");
}

void draw(){
  background(255);
  miImagen.loadPixels();
  for(int i=0;i<miImagen.width;i+=10){
    for(int j=0;j<miImagen.height;j+=10){
      color colorDelPixel = miImagen.get(i,j);
      fill(colorDelPixel);
      noStroke();
      
      rect(i, j, 10, 10);
    }
  }
}