Manual: pamsharpness

Pamsharpness User Manual(1)			   General Commands Manual			 Pamsharpness User Manual(1)

NAME
       pamsharpness - measure the sharpness of a PNM/PAM image

SYNOPSIS
       pamsharpness [imagefile]

DESCRIPTION
       This program is part of Netpbm(1).

       pamsharpness reads a Netpbm image (PNM or PAM) and prints a message to Standard Output giving a number that tells how
       sharp it is.

       Sharpness is a measure of how suddenly (in space) colors change in the image.  pamsharpness computes the sharpness of
       the  image  as  the  average  difference in intensity between each pixel and its 8 surrounding pixels, in each of the
       color components (R, G, B).

       pamsharpness does not include the edges of the image, where there are not 8 pixels surrounding a pixel, in its compu‐
       tation.

       pamsharpness assumes that the image is a PNM or PNM equivalent PAM.  If it isn't, the  results  are  not	 necessarily
       meaningful.

OPTIONS
       There  are no command line options defined specifically for pamsharpness, but it recognizes the options common to all
       programs based on libnetpbm (See	 Common Options .)

SEE ALSO
       pamsharpmap(1), pammasksharpen(1), pam(1), pnm(1)

HISTORY
       pamsharpness was added to Netpbm in Release 10.21 (March 2004).	Bryan Henderson derived it from the program pnmsharp
       by B.W. van Schooten and distributed as part of the Photopnmtools package.

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

	      http://netpbm.sourceforge.net/doc/pamsharpness.html

netpbm documentation				      07 February 2004				 Pamsharpness User Manual(1)