just messing around with Stereograms and realized how easy it is to do.
(if you dont know what this is here is a link:http://en.wikipedia.org/wiki/Autostereogram)
To see the hidden text focus your eyes behind the Screen. Try to move the focus nearer and wider until you can see the text.
what do you think of it? Can you imagine a game or a model preview with this method?
Here is an example:
Here is the generation code(maybe not the fastest solution):
package pack;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
public class Main {
BufferedImage img; // final Image
BufferedImage pattern; // pattern Image
BufferedImage depth; // depth field (inlcudes text)
int standart = 140; // pattern tile width
int tile = 100;
Random r = new Random();
public Main(){
img = new BufferedImage(500, 500, BufferedImage.TYPE_INT_RGB); // init images
depth = new BufferedImage(500,500,BufferedImage.TYPE_INT_RGB); // both need to have the same resolution
pattern = new BufferedImage(standart,standart,BufferedImage.TYPE_INT_RGB);
gen_pattern(); // generate pattern
gen_background(); // store patter to background
gen_foreground(); // gernerate the depth field
gen_stereograph(); // apply the effect
try {
File output = new File("output.jpg"); // saving the file
ImageIO.write(img,"jpg",output);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void gen_pattern(){ // a standart grayscale noise generator
for(int i = 0;i<standart;i++){
for(int j = 0;j<standart;j++){
int f = r.nextInt(255);
Color c3 = new Color(f,f,f);
pattern.setRGB(i, j, c3.getRGB());
}
}
}
public void gen_background(){ // apply pattern to background but only first tile
for(int i = 0;i<standart;i++){
for(int j = 0;j<img.getHeight();j++){
img.setRGB(i, j, pattern.getRGB(i%standart, j%standart));
}
}
}
public void gen_foreground(){ // generate the depth field
for(int i = 0;i<depth.getWidth();i++){
for(int j = 0;j<depth.getHeight();j++){
Color c1 = new Color(10,100,100);
depth.setRGB(i, j, c1.getRGB()); // fill with background color
}
}
Graphics2D g2d = depth.createGraphics();
g2d.setColor(new Color(20,60,60));
g2d.setFont(new Font("Serif",Font.BOLD,150)); // add the text
g2d.drawString("JGO", 80, 250);
g2d.dispose();
}
public void gen_stereograph(){ // the effect
for(int i = 0;i<img.getWidth();i++){
for(int j = 0;j<img.getHeight();j++){
int de = new Color(depth.getRGB(i, j)).getRed(); // getting the depth from the depth image(stored im red component)
if(i+tile < img.getWidth())img.setRGB(i+tile, j, img.getRGB(i, j)); // repetition of the background
if(i+tile-de < img.getWidth())img.setRGB(i+tile-de, j, img.getRGB(i, j)); // real stereogram effect
}
}
}
public static void main(String[] args){
new Main();
}
}
Islidius
