目的 基于阈值矩阵的加网方法设计出具有微观防伪功能的艺术型网点，利用半色调信息隐藏技术将隐藏信息载入到由微结构网点组成的色版中，研究微结构网点在信息隐藏中的应用价值。方法 利用改进后的阈值矩阵对要加载隐藏信息的色版进行微结构加网，完成各色版的半色调处理，将隐藏信息嵌入到微结构加网的色版中，利用参数匹配的解锁工具完成信息的提取，并评价信息的隐藏和提取效果。结果 通过信息的隐藏和提取实验，主观测试发现无论是单色版还是合并色版，微结构网点对信息隐藏的视觉保密性效果都比普通网点的隐蔽性好，客观结构相似度的数值计算结果都达到了0.995以上，比普通隐藏结果更佳，而且显隐能够达到信息清晰完整的再现效果。结论 该防伪方法能够在不增加成本来的条件下提高经济价值较高的印刷品和包装品的防伪标准、效率和附加价值，尤其在有价证券、护照、票据等印刷品、医药食品包装和电子影像出版产品的包装防伪方面具有广阔的应用前景与价值。

Objective The artistic dot which has microscopic security features is designed based on threshold matrices screening method, then the hidden information is loaded into the plate incorporating microstructure dots using halftone information hiding technology, and research its potential application value. Method Halftone processing to get halftone images, the plate loaded hidden information is screened by a modified threshold matrix. Then, the information is embedded into the plate incorporating microstructure dots, when the revealing layer with matching parameters is superposed on it the hidden information can be realized, and the quality of information hiding and extraction is evaluated. Result Through the information hiding and extraction experiment, the subjective visual evaluation results show that the information hiding effect on microstructure dot achieved good visual performance both in single channel and multiple channels. The same conclusion was obtained by quantitative evaluation, which reached over 0.995 of SSIM. Furthermore, information extracting achieved a clear and complete effect. Conclusion The security standard, efficiency, and added value of print and package products are improved with nearly no increase in cost. In particular, the proposed technique has extensive application prospects and value in the counterfeiting of security documents, such as banknotes, checks, certificates, and travel documents, as well as in valuable products, such as the packages of electronic image publishing products, medical drugs, and food products.