# BMP file

A BMP file is the standard image file supported by MS Windows. (dviout can read them in as Image data files and save the displayed view as a BMP file.)
In dviout, each page is expanded into a BMP file for displaying or Printing. The data in a color image file are composed when displaying or printing. The common uses are
- Monochrome (black-and-white) BMP file that is not enlarged or reduced, or is printed
- 16-color BMP file for a gray scale display
- 256-color BMP file for searching or when colored by HyperTeX
In addition, an uncompressed BMP file of 65,535 colors or 16.77 million colors can be read.
Example In one A4 page, the standards for the BMP file sizes for dpi = 300 are as follows.
1:1 monochrome BMP: about 1 Mbyte
1:1 256-color BMP: about 8 Mbytes
1:1 full color BMP: about 24 Mbytes
16-level gray scale BMP compressed by 1/4 (75 dpi): about 256 kbytes
256-color BMP compressed by 1/4 (75 dpi): about 500 kbytes