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Pamsharpness User Manual(0)			   Pamsharpness	User Manual(0)

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  pix-
       els, 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.

SEE ALSO
       pamsharpmap(1), pammasksharpen(1), pam(5), pnm(5)

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(0)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | DOCUMENT SOURCE

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