Provided by: printbill_4.1.2-1.1_i386
percentblack - how much coverage is there in a given 8-bit grayscale
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.
indicating that 4.462% of the page is covered in black.
percentblack only requires libpng to be present on the system.
Please see the accompanying README and INSTALL files for installation
instructions. Chances are if you’re reading this it’s correctly
printbill and the accompanying utilities were written by Daniel
Franklin (firstname.lastname@example.org). The web interface was written by Phil
You can always grab the latest and greatest version from
printbill(1), printbill(8), printbilld(1), printbill_configure(8),
printbill_grapher(1), percentcolour(1), percent_cmy(1), pqcheck(1),
printquote(1), printbill_printer(1), printbillrc(5), printcap(5),