典型的LSB水印嵌入和提取算法，它是一个基本的matlab程序，可以帮助初学者入门 -typical LSB embedding and extraction algorithm, which is a basic Matlab procedures, Portal can help beginners

說明波的基本性質以及波動的運作方式，適合初學者入門使用。-Say Mingbo basic nature of the fluctuations in the mode of operation, suitable for beginners to use portal.