tiff2bw(1)


NAME

   tiff2bw - convert a color TIFF image to greyscale

SYNOPSIS

   tiff2bw [ options ] input.tif output.tif

DESCRIPTION

   Tiff2bw  converts  an  RGB  or  Palette color TIFF image to a greyscale
   image by combining percentages of the red, green,  and  blue  channels.
   By  default,  output  samples  are  created  by  taking  28% of the red
   channel, 59% of the green channel, and 11% of  the  blue  channel.   To
   alter these percentages, the -R, -G, and -B options may be used.

OPTIONS

   -c     Specify  a compression scheme to use when writing image data: -c
          none  for  no  compression,  -c  packbits   for   the   PackBits
          compression  algorithm,  -c  zip  for  the  Deflate  compression
          algorithm, -c g3 for the CCITT Group 3 compression algorithm, -c
          g4  for  the CCITT Group 4 compression algorithm, and -c lzw for
          Lempel-Ziv & Welch (the default).

   -r     Write data with a specified number of rows per strip; by default
          the  number  of  rows/strip  is  selected  so that each strip is
          approximately 8 kilobytes.

   -R     Specify the percentage of the red channel to use (default 28).

   -G     Specify the percentage of the green channel to use (default 59).

   -B     Specify the percentage of the blue channel to use (default 11).

SEE ALSO

   pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

   Libtiff library home page: http://www.simplesystems.org/libtiff/





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.