In addition, other countries have reported detection of melamine in other product categories, such as confections and beverages.

此外，一些别的国家报告在别的类别产品中也发现了三聚氰胺，比如糖果和饮料。

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Classified the curvilinear detection methods into six categories, and mainly introduced the pattern recognition techniques, model-based approaches and tracking-based approaches.

对目前存在的曲线结构检测方法进行分类，并重点介绍了模式识别技术、基于模型的方法和基于跟踪的方法。

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The existing face detection methods can be classified into four categories: Knowledge-based methods, Feature invariant approaches, Template matching methods and Appearance-based methods.

现有的静止图像人脸检测算法主要有四类：基于知识的方法、基于特征不变量的方法、基于模板匹配的方法和基于表象的方法。

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