Design captcha code based on Java

patchca\.classpath
patchca\.gitignore
patchca\.project
patchca\.settings\org.eclipse.core.resources.prefs
patchca\.settings\org.eclipse.jdt.core.prefs
patchca\.travis.yml
patchca\doc\images\patcha_demo.png
patchca\doc\images\patcha_demo0.png
patchca\doc\images\patcha_demo1.png
patchca\doc\images\patcha_demo2.png
patchca\doc\images\patcha_demo3.png
patchca\doc\images\patcha_demo4.png
patchca\licence-gpl.txt
patchca\licence-lgpl.txt
patchca\patcha_demo.png
patchca\patcha_demo0.png
patchca\patcha_demo1.png
patchca\patcha_demo123.png
patchca\patcha_demo1233.png
patchca\patcha_demo2.png
patchca\patcha_demo3.png
patchca\patcha_demo4.png
patchca\pom.xml
patchca\README.md
patchca\src\main\java\org\patchca\background\BackgroundFactory.java
patchca\src\main\java\org\patchca\background\GradientBackgroundFactory.java
patchca\src\main\java\org\patchca\background\SingleColorBackgroundFactory.java
patchca\src\main\java\org\patchca\color\ColorFactory.java
patchca\src\main\java\org\patchca\color\GradientColorFactory.java
patchca\src\main\java\org\patchca\color\RandomColorFactory.java
patchca\src\main\java\org\patchca\color\SingleColorFactory.java
patchca\src\main\java\org\patchca\filter\AbstractFilterFactory.java
patchca\src\main\java\org\patchca\filter\ConfigurableFilterFactory.java
patchca\src\main\java\org\patchca\filter\FilterFactory.java
patchca\src\main\java\org\patchca\filter\library\AbstractConvolveImageOp.java
patchca\src\main\java\org\patchca\filter\library\AbstractImageOp.java
patchca\src\main\java\org\patchca\filter\library\AbstractTransformImageOp.java
patchca\src\main\java\org\patchca\filter\library\BlurImageOp.java
patchca\src\main\java\org\patchca\filter\library\CurvesImageOp.java
patchca\src\main\java\org\patchca\filter\library\DiffuseImageOp.java
patchca\src\main\java\org\patchca\filter\library\DoubleRippleImageOp.java
patchca\src\main\java\org\patchca\filter\library\MarbleImageOp.java
patchca\src\main\java\org\patchca\filter\library\PerlinNoise.java
patchca\src\main\java\org\patchca\filter\library\RippleImageOp.java
patchca\src\main\java\org\patchca\filter\library\SoftenImageOp.java
patchca\src\main\java\org\patchca\filter\library\WobbleImageOp.java
patchca\src\main\java\org\patchca\filter\predefined\CurvesRippleFilterFactory.java
patchca\src\main\java\org\patchca\filter\predefined\DiffuseRippleFilterFactory.java
patchca\src\main\java\org\patchca\filter\predefined\DoubleRippleFilterFactory.java
patchca\src\main\java\org\patchca\filter\predefined\MarbleRippleFilterFactory.java
patchca\src\main\java\org\patchca\filter\predefined\RippleFilterFactory.java
patchca\src\main\java\org\patchca\filter\predefined\WobbleRippleFilterFactory.java
patchca\src\main\java\org\patchca\font\FontFactory.java
patchca\src\main\java\org\patchca\font\RandomFontFactory.java
patchca\src\main\java\org\patchca\service\AbstractCaptchaService.java
patchca\src\main\java\org\patchca\service\Captcha.java
patchca\src\main\java\org\patchca\service\CaptchaService.java
patchca\src\main\java\org\patchca\service\ConfigurableCaptchaService.java
patchca\src\main\java\org\patchca\service\SimpleCaptchaService.java
patchca\src\main\java\org\patchca\text\renderer\AbstractTextRenderer.java
patchca\src\main\java\org\patchca\text\renderer\BestFitTextRenderer.java
patchca\src\main\java\org\patchca\text\renderer\RandomYBestFitTextRenderer.java
patchca\src\main\java\org\patchca\text\renderer\SimpleTextRenderer.java
patchca\src\main\java\org\patchca\text\renderer\TextCharacter.java
patchca\src\main\java\org\patchca\text\renderer\TextRenderer.java
patchca\src\main\java\org\patchca\text\renderer\TextString.java
patchca\src\main\java\org\patchca\utils\encoder\EncoderHelper.java
patchca\src\main\java\org\patchca\word\AdaptiveRandomWordFactory.java
patchca\src\main\java\org\patchca\word\RandomWordFactory.java
patchca\src\main\java\org\patchca\word\WordFactory.java
patchca\src\test\java\org\patchca\demo\PatchcaFilterDemo.java
patchca\src\test\java\org\patchca\demo\PatchcaFilterDemoPNG.java
patchca\src\test\java\org\patchca\demo\Sample.java
patchca\src\test\java\org\patchca\demo\ValidationCode.java
patchca\ssa.png
patchca\target\classes\META-INF\MANIFEST.MF
patchca\target\classes\META-INF\maven\net.pusuo\patchca\pom.properties
patchca\target\classes\META-INF\maven\net.pusuo\patchca\pom.xml
patchca\target\classes\org\patchca\background\BackgroundFactory.class
patchca\target\classes\org\patchca\background\GradientBackgroundFactory$Direction.class
patchca\target\classes\org\patchca\background\GradientBackgroundFactory.class
patchca\target\classes\org\patchca\background\SingleColorBackgroundFactory.class
patchca\target\classes\org\patchca\color\ColorFactory.class
patchca\target\classes\org\patchca\color\GradientColorFactory.class
patchca\target\classes\org\patchca\color\RandomColorFactory.class
patchca\target\classes\org\patchca\color\SingleColorFactory.class
patchca\target\classes\org\patchca\filter\AbstractFilterFactory.class
patchca\target\classes\org\patchca\filter\ConfigurableFilterFactory.class
patchca\target\classes\org\patchca\filter\FilterFactory.class
patchca\target\classes\org\patchca\filter\library\AbstractConvolveImageOp.class
patchca\target\classes\org\patchca\filter\library\AbstractImageOp.class
patchca\target\classes\org\patchca\filter\library\AbstractTransformImageOp.class
patchca\target\classes\org\patchca\filter\library\BlurImageOp.class
patchca\target\classes\org\patchca\filter\library\CurvesImageOp.class
patchca\target\classes\org\patchca\filter\library\DiffuseImageOp.class
patchca\target\classes\org\patchca\filter\library\DoubleRippleImageOp.class
patchca\target\classes\org\patchca\filter\library\MarbleImageOp.class
patchca\target\classes\org\patchca\filter\library\PerlinNoise.class
patchca\target\classes\org\patchca\filter\library\RippleImageOp.class
patchca\target\classes\org\patchca\filter\library\SoftenImageOp.class

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