针对2维工程图的版权保护问题，基于HVS与标注特征，提出了一种2维工程图的信息隐藏算法。该算法先获得工程图中的标注实体集，然后根据Logistic混沌系统所产生的二值化混沌序列对待隐藏信息进行加密，结合HVS和加密后信息对标注实体的颜色与线宽特征进行微小修改，从而实现信息的隐藏。仿真结果表明，该信息隐藏算法对旋转、平移、均匀缩放、非均匀缩放、噪声等攻击具有较好的鲁棒性。

Focusing on the problem of copy right protection for two-dimensional engineering graphic, an information hiding algorithm based on HVS and dimension characters is proposed. The sequenced dimension entity set is firstly acquired from the engineering graphic. Then the message is encrypted by a two-value chaotic sequence generated by Logistic map. The color and line weight character of a certain dimension entity is selected. And a slight modification is made to them based on HVS and the encrypted message. Simulation results show that the proposed algorithm is robust against the attacks such as rotation, moving, equal scaling, unequal scaling and noise.