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 computation.

       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)