Java awt font spacing options
Since the Brazilian government does not have a public API for postal codes, I am trying to reverse engineer the code that correios.com.br uses to generate the image below so I can generate my own images to train the OCR program.
I believe that I have already got almost everything right besides the text spacing and the colors:
I am not interested on the colors now, but the text spacing is really bothering me. For instance, have a look on the 'Ti' in 'Tijuca'. The two letters are really close together in the original image and I can't reproduce this feature. I have already tried to derive the font, setting values to TextAttribute.TRACKING
and TextAttribute.KERNING
, but it did not work.
Here follows my code:
import java.awt.Color;
import java.awt.font.TextAttribute;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
public class CreateImage {
/**
* @param args
*/
public static void main(String[] args) {
int width = 570;
int height = 120;
boolean new_image = true;
BufferedImage img;
if (!new_image) {
try {
img = ImageIO.read(new File("original.jpg"));
} catch (IOException e) {
e.printStackTrace();
new_image = true;
img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
}
} else {
img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
}
Graphics2D g2d = img.createGraphics();
if (new_image) {
// white background
g2d.setPaint(Color.WHITE);
g2d.fillRect(0, 0, width, height);
g2d.setPaint(Color.BLACK);
} else {
g2d.setPaint(Color.RED);
}
Font myfont = new Font("SansSerif", Font.BOLD, 11);
/*
Hashtable<TextAttribute, Float> attributes = new Hashtable<TextAttribute, Float>();
attributes.put(TextAttribute.TRACKING, new Float(-0.01));
myfont = myfont.deriveFont(attributes);
*/
g2d.setFont(myfont);
g2d.drawString("Logradouro:", 5, 13);
g2d.drawString("Bairro:", 5, 33);
g2d.drawString("Localidade / UF:", 5, 53);
g2d.drawString("CEP:", 5, 73);
g2d.drawString("Avenida das Américas - de 3979 a 5151 - lado ímpar", 105, 13);
g2d.drawString("Barra da Tijuca", 105, 33);
g2d.drawString("Rio de Janeiro/RJ", 105, 53);
g2d.drawString("22631-004", 105, 73);
g2d.dispose();
File file = new File("clone.jpg");
try {
ImageIO.w开发者_开发知识库rite(img, "jpg", file);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("clone.jpg file created.");
}
}
My question is: What are the other options to control how a string is spaced when it's drawn? Do you have any ideas on what the original code may be doing?
Thanks!
I can't really say how to do it properly in Swing, but what you are looking for is in typography called "kerning", so that attribute ought to do something similar.
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