[Printing-architecture] snmp - average-toner-coverage per page

[Johannes Meixner]

Hello,

On May 3 16:35 Predut, Marius wrote (excerpt):
> After I print page I want to know average-toner-coverage-per-page
> (a kind of Cost per Page).
> To do it are 3 possibilities:
>
> 1. Get the amount of toner used and rapport it to a
>    standard (%5 coverage) - prices
> 2. Get the effective printed area relative to the paper
>    (supppoe user print only halp of paper) - less precise
> 3. Get the stream from printer and analyze it.

4. Get the PostScript stream while print job filtering
    and analyze it.

Newer Ghostscript versions provide the Ghostscript
devices ink_cov and inkcov that output ink coverage:
-----------------------------------------------------------
$ gs -q -dNOPAUSE -dBATCH -sDEVICE=ink_cov \
  -sOutputFile=/tmp/ink_cov.out \
  /usr/share/ghostscript/9.19/examples/colorcir.ps

$ cat /tmp/ink_cov.out
  5.33833  5.95657  6.71122  4.25845 CMYK OK

$ gs -q -dNOPAUSE -dBATCH -sDEVICE=inkcov \
  -sOutputFile=/tmp/inkcov.out \
  /usr/share/ghostscript/9.19/examples/colorcir.ps

$ cat /tmp/inkcov.out
  0.09991  0.08222  0.08234  0.08425 CMYK OK
-----------------------------------------------------------
See "Ink coverage output" in
http://www.ghostscript.com/doc/current/Devices.htm#Test


Kind Regards
Johannes Meixner
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