1Pamsharpness User Manual(0)                        Pamsharpness User Manual(0)
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NAME

6       pamsharpness - measure the sharpness of a PNM/PAM image
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SYNOPSIS

10       pamsharpness [imagefile]
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DESCRIPTION

14       This program is part of Netpbm(1).
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16       pamsharpness  reads a Netpbm image (PNM or PAM) and prints a message to
17       Standard Output giving a number that tells how sharp it is.
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19       Sharpness is a measure of how suddenly (in space) colors change in  the
20       image.  pamsharpness computes the sharpness of the image as the average
21       difference in intensity between each pixel and its 8  surrounding  pix‐
22       els, in each of the color components (R, G, B).
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24       pamsharpness  does  not include the edges of the image, where there are
25       not 8 pixels surrounding a pixel, in its computation.
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27       pamsharpness assumes that the image is a PNM or PNM equivalent PAM.  If
28       it isn't, the results are not necessarily meaningful.
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OPTIONS

32       There  are  no  command line options defined specifically for pamsharp‐
33       ness, but it recognizes the options common to  all  programs  based  on
34       libnetpbm (See
35        Common Options ⟨index.html#commonoptions⟩ .)
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SEE ALSO

39       pamsharpmap(1), pammasksharpen(1), pam(1), pnm(1)
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HISTORY

43       pamsharpness  was added to Netpbm in Release 10.21 (March 2004).  Bryan
44       Henderson derived it from the program pnmsharp by B.W. van Schooten and
45       distributed as part of the Photopnmtools package.
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DOCUMENT SOURCE

48       This  manual  page was generated by the Netpbm tool 'makeman' from HTML
49       source.  The master documentation is at
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51              http://netpbm.sourceforge.net/doc/pamsharpness.html
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53netpbm documentation           07 February 2004    Pamsharpness User Manual(0)