DIB(Device-indepent bitmap)的与设备无关性主要体现在以下两个方面： DIB的颜色模式与设备无关。例如，一个256色的DIB即可以在真彩色显示模式下使用，也可以在16色模式下使用。 256色以下(包括256色)的DIB拥有自己的颜色表，像素的颜色独立于系统调色板。 由于DIB不依赖于具体设备，因此可以用来永久性地保存图象。DIB一般是以*.BMP文件的形式保存在磁盘中的，有时也会保存在*.DIB文件中。运行在不同输出设备下的应用程序可以通过DIB来交换图象。 DIB还可以用一种RLE算法来压缩图像数据，但一般来说DIB是不压缩的。 DIB的结构-DIB (Device-indepentent bitmap) has nothing to do with sexual equipment mainly in the following two aspects : DIB color mode has nothing to do with the equipment. For example, a 256-color DIB is the true color display mode, or can be used in 16 color mode. 256-color below (including 256 colors), the DIB has its own color table, color of the pixel independent system palette. As DIB is not dependent on specific equipment, it can be used for permanent preservation of images. DIB normally*. BMP file stored in the form of disk, sometimes stored in*. DIB document. Running on different output devices under the application of the procedure can be DIB to exchange images. DIB can also use a RLE compression algorithm to image data, but generally DIB is not compressed. DIB structure