不是垃圾的虚拟图像……。
This paper was a review of the methods of feature extraction and feature selection for spam image identification.
对垃圾图像判别问题中的特征提取和特征选择研究现状进行了总结。
Robots may post lots of spam comments into your database. You can add a verification code image or a math equation to avoid this.
于是便动手写了一个插件，不仅可以采用数学等式验证，更可以使用图片验证码。
Robots may post lots of spam comments into your database. You can add a verification code image or a math equation to avoid this.
于是便动手写了一个插件，不仅可以采用数学等式验证，更可以使用图片验证码。
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