수업자료_invert

size(600,400);
background(255);
PImage img=loadImage("01.jpg");
image(img,0,0);

loadPixels();
for(int i=0; i<(width*height); i++){
  int r=abs(int(red(pixels[i]))-255);
  int g=abs(int(green(pixels[i]))-255);
  int b=abs(int(blue(pixels[i]))-255);
  int a=int(alpha(pixels[i]));
 
  pixels[i]=color(r,g,b,a);
}
updatePixels();