1\ 2.\" This man page was generated by the Netpbm tool 'makeman' from HTML source. 3.\" Do not hand-hack it! If you have bug fixes or improvements, please find 4.\" the corresponding HTML page on the Netpbm website, generate a patch 5.\" against that, and send it to the Netpbm maintainer. 6.TH "Pamsharpness User Manual" 0 "07 February 2004" "netpbm documentation" 7 8.SH NAME 9pamsharpness - measure the sharpness of a PNM/PAM image 10 11.UN synopsis 12.SH SYNOPSIS 13\fBpamsharpness\fP [\fIimagefile\fP] 14 15.UN description 16.SH DESCRIPTION 17.PP 18This program is part of 19.BR "Netpbm" (1)\c 20\&. 21.PP 22\fBpamsharpness\fP reads a Netpbm image (PNM or PAM) and prints a 23message to Standard Output giving a number that tells how sharp it is. 24.PP 25Sharpness is a measure of how suddenly (in space) colors change in 26the image. \fBpamsharpness\fP computes the sharpness of the image as 27the average difference in intensity between each pixel and its 8 surrounding 28pixels, in each of the color components (R, G, B). 29.PP 30\fBpamsharpness\fP does not include the edges of the image, where 31there are not 8 pixels surrounding a pixel, in its computation. 32.PP 33\fBpamsharpness\fP assumes that the image is a PNM or PNM 34equivalent PAM. If it isn't, the results are not necessarily 35meaningful. 36 37.UN seealso 38.SH SEE ALSO 39.BR "pamsharpmap" (1)\c 40\&, 41.BR "pammasksharpen" (1)\c 42\&, 43.BR "pam" (5)\c 44\&, 45.BR "pnm" (5)\c 46\& 47 48.UN history 49.SH HISTORY 50.PP 51\fBpamsharpness\fP was added to Netpbm in Release 10.21 (March 522004). Bryan Henderson derived it from the program \fBpnmsharp\fP by 53B.W. van Schooten and distributed as part of the Photopnmtools 54package. 55.SH DOCUMENT SOURCE 56This manual page was generated by the Netpbm tool 'makeman' from HTML 57source. The master documentation is at 58.IP 59.B http://netpbm.sourceforge.net/doc/pamsharpness.html 60.PP