一套用于生成各种图形验证码的库(Java)，底下是一些生成验证码的例子：
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Image generated with the fiveletterFirstName generator. |
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Image generated with random character generator with 6 chars per captcha |
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same but with different font and background colors |
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etc. |
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or with the ShadowGimpyImp |
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with a simplified Chinese word producer |
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FishEye distrotion applied to captcha |
