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Pamsharpness User Manual
.SH 1
pamsharpness
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Updated: 07 Februrary 2004
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Table Of Contents
.SH 2
NAME
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pamsharpness - measure the sharpness of a PNM/PAM image
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SYNOPSIS
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\fBpamsharpness\fR [\fIimagefile\fR]
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DESCRIPTION
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This program is part of Netpbm.
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\fBpamsharpness\fRreads a Netpbm image (PNM or PAM) and prints a
number that tells how sharp it is.
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Sharpness is a measure of how suddenly (in space) colors change in
the image.  \fBpamsharpness\fR 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).
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\fBpamsharpness\fR does not include the edges of the image, where
there are not 8 pixels surrounding a pixel, in its computation.
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\fBpamsharpness\fR assumes that the image is a PNM or PNM
equivalent PAM.  If it isn't, the results are not necessarily
meaningful.
.SH 2
SEE ALSO
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\fBpamsharpmap\fR,
\fBpammasksharpen\fR,
\fBpam\fR,
\fBpnm\fR
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HISTORY
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\fBpamsharpness\fR was added to Netpbm in Release 10.21 (March
2004).  Bryan Henderson derived it from the program \fBpnmsharp\fR by
B.W. van Schooten and distributed as part of the Photopnmtools
package.
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.SH 2
Table Of Contents
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HISTORY
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