中文摘要：

LSB替换隐藏是一种非常有效的信息隐藏方法，也产生了许多基于LSB替换的最优信息隐藏方法，其中，基于LSB替换信息隐藏的改进方法中许多方法都需要产生附加的信息。改进方法中随着附加信息量的增加，隐藏的效果会越来越好，但附加信息量越大，需要额外传送的信息量就越多。文献中大多都没有考虑额外信息量对其隐藏的影响。本文就此提出了一种评价产生附加信息的LSB隐藏方法的评价方法，并建立了评价模型，可根据其方法的峰值信噪比和产生的附加信息量来判断该方法的优劣。实验表明，该方法可用于评价基于LSB替换信息隐藏的改进方法的好坏。

英文摘要：

Simple LSB substitution is an effective information hiding method, and based on the simple LSB substitution, many improved information hiding method is proposed, among which many improved methods will produce additional message, and the more bits of additional message, the better is the hiding result. But with the increasing of the additional message, the message needing additionally transmitted is increasing, which is not considerated in many papers. In this paper, an evaluation method is proposed to evaluate information hiding with additional message based on LSB substitution, and the evaluated model is established. Experimental results show that this evaluation method can evaluate the improving information hiding method which is based on LSB substitution.