Improve Captcha readability

src/main/java/com/fpghoti/biscuit/captcha/BCage.java

@@ -0,0 +1,34 @@
+package com.fpghoti.biscuit.captcha;
+
+import java.awt.Font;
+import java.util.Random;
+
+import com.github.cage.Cage;
+import com.github.cage.ObjectRoulette;
+import com.github.cage.image.EffectConfig;
+import com.github.cage.image.Painter;
+import com.github.cage.image.RgbColorGenerator;
+import com.github.cage.image.ScaleConfig;
+import com.github.cage.token.RandomCharacterGeneratorFactory;
+import com.github.cage.token.RandomTokenGenerator;
+
+public class BCage extends Cage {
+
+	private static int width = 300;
+	private static int height = 100;
+	private static int fontHeight = 80;
+	private static String chars = "abcdefhijkmnoprstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ123456789";
+	private static int length = 6;
+
+	public BCage() {
+		this(new Random());
+	}
+
+	protected BCage(Random rnd) {
+		super(new Painter(width, height, null, null, new EffectConfig(true,
+				false, true, false, new ScaleConfig(0.85f, 0.85f)), rnd),
+				new ObjectRoulette<Font>(rnd, new Font(Font.SERIF, Font.PLAIN, fontHeight)), //
+				new RgbColorGenerator(rnd), null, null, 
+				new RandomTokenGenerator(rnd, new RandomCharacterGeneratorFactory(chars.toCharArray(), null, rnd), length, 0), rnd);
+	}
+}