Pamsharpness User Manual(1) General Commands ManualPamsharpness 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 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.
OPTIONS
There are no command line options defined specifically for pamsharp-
ness, but it recognizes the options common to all programs based on
libnetpbm (See
Common Options ⟨index.html#commonoptions⟩ .)
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)
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