🤖 capja

Easy-to-use Java CAPTCHA image generation API used by Sonar

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Examples

capja being used in Minecraft as a CAPTCHA

https://youtu.be/Aw1w-7S0GjA

capja being integrated in Sonar

CaptchaPreparer.java (using custom filters)

Usage

import java.awt.image.BufferedImage;

// Creates a CAPTCHA generator instance
simpleCaptchaGenerator = new SimpleCaptchaGenerator(width, height, null);

// You can also use a custom background image
simpleCaptchaGenerator = new SimpleCaptchaGenerator(width, height, new File("background.png"));

// Creates a BufferedImage with the code 69420
bufferedImage = simpleCaptchaGenerator.createImage(new char[]{'6', '9', '4', '2', '0'});

// You can also use custom effects and filters
bufferedImage = simpleCaptchaGenerator.createImage(/* ... */, new BumpFilter(), new SmearFilter());

License

capja is licensed under the GNU General Public License 3.0.

Credits

• Special thanks to jhlabs for creating awesome image filters