中文摘要：

为了提高信息隐藏容量，而又保证安全性和不可感知性，对传统基于LSB（LeastSignificantBit）的信息隐藏方法进行了以下两方面改进：增加载体空间容量以提高信息隐藏量；引入混沌序列对秘密信息进行加密以提高信息隐藏的安全性。在经典Lena图像上对改进方法进行验证，结果表明该方法在保持载体图像视觉特性和纹理特性的同时，信息隐藏量由原来的12．5％提高到21％，混沌序列的引入不仅使得信息隐藏安全性得到保证，而且也消除了信息提取过程中对原栽体的依赖。

英文摘要：

In order to increase information hiding capability, and ensure security and imperceptibility of hided information, the traditional LSB-based information hiding method was improved in two aspects： increase of the carrier＇s space capability to improve information hiding quantity, introduction of chaotic sequence to encrypt the secret information for improving the security of hidded information. Verification for the improved method was done on classical Lena image. The results show that the method can increase the imformation hiding quantity from 12.5% to 21%, while keeping the characteristics of carrier＇s image vision and texture, and the introduction of chaotic sequence not only guarantees the imformation hiding safety but slao eliminates the depen- dence to the original carrier in the information extraction process.