percentblack(1)

Usage

percentblack filename.png

Overview

percentblack prints a percentage coverage for a given PNG image, to three decimal places. filename.png must be 8-bit grayscale, such as is generated by GhostScript's pnggray device. Pixels which are gray make an appropriately scaled contribution to the total percentage.

Examples

percentblack filename.png

yields

4.462

indicating that 4.462% of the page is covered in black.

Requirements

percentblack only requires libpng to be present on the system.

Installation

Please see the accompanying README and INSTALL files for installation instructions. Chances are if you're reading this it's correctly installed.

printbill(1) print filter front-end to printbilld printbill(8) fair printing billing and accounting system. printbilld(1) print billing/accounting/quote-generating daemon printbill_configure(8) create template printbillrc and printcap files printbill_grapher(1) check your print quota percentcolour(1) how much C/M/Y/K coverage is there in a given PNG image. percent_cmy(1) how much C/M/Y coverage is there in a given PNG image. pqcheck(1) check your print quota printquote(1) give a quote for a print job printbill_printer(1) fair printing billing and accounting system. printbillrc(5) fair printing billing and accounting system config file printcap(5) printer capability database init_from_passwd(8) give your users an initial print quota. pqm(8) manage printbill's various databases.

Referred to by

pqm(1) manage printbill's various databases. pqcheck(1) check your print quota printbill(1) print filter front-end to printbilld printbilld(1) print billing/accounting/quote-generating daemon printquote(1) give a quote for a print job percent_cmy(1) how much C/M/Y coverage is there in a given PNG image. printbillrc(1) fair printing billing and accounting system config file percentcolour(1) how much C/M/Y/K coverage is there in a given PNG image. init_from_passwd(1) give your users an initial print quota. printbill_grapher(1) check your print quota printbill_printer(1) fair printing billing and accounting system. pqm(8) manage printbill's various databases. printbill(8) fair printing billing and accounting system. init_from_passwd(8) give your users an initial print quota. printbill_configure(8) create template printbillrc and printcap files printbillrc(5) fair printing billing and accounting system config file