说明：  自写Dib类，西安理工大学和克智老师自写的DIB类，包括序列化、读写、灰度化等，以及少量扩展函数，该DIB不使用简单，代码通俗易懂，与其他使用时使用句柄的DIB不同，属于基本DIB，扩展性很好，在此基础上编写其他图像处理功能很方便
(Since the writing category Dib, Xi an Polytechnic University and a teacher since Kezhi written DIB categories, including serialization, read and write, gray, and so on, as well as a small amount of spread function, the DIB does not use simple, easily understood code, when used with other the use of the DIB handle different basic DIB, good scalability, on the basis of preparation of other image processing functions is convenient)