Generate captcha for train

.gitignore

*.class
/labeled-raw
/labeled-raw-verify

build-and-run.sh

javac -cp "./simplecaptcha-1.2.jar" GenerateCaptcha.java

java -cp "./simplecaptcha-1.2.jar:./" GenerateCaptcha 2000 ./labeled-raw-verify
java -cp "./simplecaptcha-1.2.jar:./" GenerateCaptcha 10000 ./labeled-raw

GenerateCaptcha.java

import java.io.File;
import javax.imageio.ImageIO;
import nl.captcha.Captcha;
import nl.captcha.gimpy.FishEyeGimpyRenderer;
import nl.captcha.backgrounds.TransparentBackgroundProducer;

public class GenerateCaptcha {
  public static void main(String[] args) {
    int count = args.length > 0 ? Integer.parseInt(args[0]) : 10;
    String outputDirPath = args.length > 1 ? args[1] : "./labeled-raw";

    System.out.printf("Generate %d captcha(s) to directory \"%s\"\n", count, outputDirPath);
    File outputDir = new File(outputDirPath);
    if (!outputDir.exists()) {
      outputDir.mkdirs();
      System.out.printf("Created directory \"%s\"\n", outputDirPath);
    }

    for (int i = 0; i < count; i++) {
      try {
        Captcha captcha = new Captcha.Builder(130, 50)
            .addText()
            .addBorder()
            .addBackground(new TransparentBackgroundProducer())
            .gimp(new FishEyeGimpyRenderer())
            .build();

        String ans = captcha.getAnswer();
        String filename = String.format("%s--%d.png", ans, System.currentTimeMillis());
        ImageIO.write(captcha.getImage(), "png", new File(outputDir, filename));
        System.out.printf("Captcha \"%s\", #%d\n", ans, i);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    System.out.println("Completed!");
  }
}

simplecaptcha-1.2.jar