CentOS 7.0 - man page for pamsharpness (centos section 0)
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Pamsharpness User Manual(0) Pamsharpness User Manual(0)
pamsharpness - measure the sharpness of a PNM/PAM image
This program is part of Netpbm(1)
pamsharpness reads a Netpbm image (PNM or PAM) and prints a number that tells how sharp it
Sharpness is a measure of how suddenly (in space) colors change in the image. pamsharp-
ness 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 sur-
rounding 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.
pamsharpmap(1) , pammasksharpen(1) , pam(1) , pnm(1)
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 Photopnm-
netpbm documentation 07 February 2004 Pamsharpness User Manual(0)
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