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Full Discussion: Script to provide percentages?
Top Forums Shell Programming and Scripting Script to provide percentages? Post 302602148 by SkySmart on Sunday 26th of February 2012 08:59:35 AM
Old 02-26-2012
Script to provide percentages?
so i'm have been stifled here inn my attempts at this.

i need to calculate an unusual figure.

what is the percentage difference between 400 and 3?

usually, to get the percentage, you just divide the smaller number by the bigger number. then multiply the answer by 100.

in this case however, 3 divided 400 gives a 0.0075. that means nothing to me. how can i get the real percentage of this?
 

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LEARN ABOUT CENTOS

tiff2bw

TIFF2BW(1)						      General Commands Manual							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 approxi-
	      mately 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.remotesensing.org/libtiff/

libtiff 							 November 2, 2005							TIFF2BW(1)
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