Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
BW(5)				    BRL-CAD				 BW(5)

NAME
       bw - Black and White image file format and utilities

FORMAT
       A bw file contains sequences of pixels. Each pixel is stored as one
       unsigned	char, and thus ranges in intensity from	0 (black) to 255
       (white).	The first pixel	in a bw	file is	the lower left corner of the
       image. The pixels proceed from left-to-right across each	scanline, with
       scanlines being written from the	bottom to the top of the image.

       By convention, bw images	are usually square, and	thus their dimensions
       can be determined by the	file size. If this is not the case, often only
       the file	width need be known by a program reading the file. History has
       left us with two	"standard" sizes, 512x512 and the "higher" 1024x1024.
       A common	practice for other file	sizes is to include the	file width in
       the filename.

       At some time in the future bw files will	probably get self-typing
       headers so that parameters such as their	size can be automatically
       determined by programs.

UTILITIES
       bw-fb display a .bw format image	on a framebuffer.

       fb-bw produce a .bw file	from a framebuffer image.

       bw-pix convert a	.bw file to a color .pix file.

       pix-bw convert a	color .pix file	to a .bw file.

       bwstat gives statistics concerning a .bw	file.

       bwhist displays a histogram on a	framebuffer.

       bwmod a filter to shift and scale pixel intensities.

       bwdiff yields the difference between two	.bw files.

       bwrect extracts an arbitrary rectangle from a .bw file.

       bwcrop maps any quadrilateral in	a .bw file into	any rectangle.

       bwrot rotates, reverses,	or inverts a .bw file.

       bwscale scales a	.bw file larger	or smaller.

       bwfilter	a variety of 3x3 kernel	filters	for .bw	images.

       bw3-pix merges three .bw	files into one .pix file.

       pix-bw3 separates .pix file RGB colors into three .bw files.

FILES
       file.bw

SEE ALSO
       brlcad(1), pix(5), and above named programs.

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1989-2013	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       <devs@brlcad.org>.

BRL-CAD				  07/08/2017				 BW(5)

NAME | FORMAT | UTILITIES | FILES | SEE ALSO | AUTHOR | COPYRIGHT | BUG REPORTS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=bw&sektion=5&manpath=FreeBSD+12.0-RELEASE+and+Ports>

home | help