中文说明：针对一个文字图像嵌入水印，使用matlab进行仿真。基本思想是基于系数类嵌入水印，即0,1bit，每一个0或1代表一个水印位。在嵌入水印前首先将文本行从时域转化为空域，这时才有系数类的概念。在嵌入水印时，选用哪些系数嵌入水印，以及嵌入多少水印，需要根据经验来确定。
English Description：
For a literal Image Watermarking, and simulation using MATLAB. Basic idea is based on type of watermark, namely 0,1bit, each a 0 or 1 representing a watermark. In front of the watermark text in the first line from the time domain into airspace, coefficient of class concepts. When you embed a watermark, what coefficients embed watermarks, embedding the watermark, based on experience is needed to determine.