02-20-2016
Quote:
Originally Posted by
rohit_shinez
... can any modification done from my query which i have posted ...
Yes, and that's exactly what I did. I started with your query as the starting point and ended up at the posted query.
Quote:
Originally Posted by
rohit_shinez
... while taking 500 i need take greatest(500,T1 max_amt) ...
Post an example of what the output looks like for such a case. How are the ranges shifted? What are their intervals? What is the final output? You can take the example you posted earlier or a new one.
Quote:
Originally Posted by
rohit_shinez
...if i change the value of 500 to another value for eg. 200 it doesnt work
How do you determine it doesn't work?
What do you look for in the output? Or, how is the output different from what you expect?
Post an example to demonstrate the difference between what you expect and what you get.
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LEARN ABOUT V7
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)
NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO
ppm(5)
AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)