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+.\" This man page was generated by the Netpbm tool 'makeman' from HTML source.
+.\" Do not hand-hack it!  If you have bug fixes or improvements, please find
+.\" the corresponding HTML page on the Netpbm website, generate a patch
+.\" against that, and send it to the Netpbm maintainer.
+.TH "Pgmabel User Manual" 0 "June 2002" "netpbm documentation"
+
+.SH NAME
+pgmabel - create cross section using Abel Integration for Deconvolution
+
+.UN synopsis
+.SH SYNOPSIS
+
+\fBpgmabel\fP
+[\fB-help\fP]
+[\fB-axis\fP \fIaxis\fP]
+[\fB-factor\fP \fIfactor\fP]
+[\fB-pixsize\fP \fIpixsize\fP]
+[\fB-left\fP | \fB-right\fP]
+[\fB-verbose\fP]
+[\fIfilespec\fP]
+
+.UN description
+.SH DESCRIPTION
+.PP
+This program is part of
+.BR "Netpbm" (1)\c
+\&.
+.PP
+\fBpgmabel\fP reads as input a PGM image, which it assumes to be an
+image of a rotational symmetric transparent object.  The image must have
+a vertical symmetry axis.  \fBpgmabel\fP produces as output an image of
+a cross-section of the image.
+
+\fBpgmabel\fP does the calculation by performing the Abel Integration
+for Deconvolution of an axial-symmetrical image by solving the system
+of linear equations.
+
+After integration, \fBpgmabel\fP weights all gray-values of one side
+by the surface area of the calculated ring in square pixels divided by
+4*\fIfactor\fP multiplied by the size of one pixel (\fIpixsize\fP).
+With the \fB-verbose\fP option, \fBpgmabel\fP prints the weighting
+factors.
+.PP
+Where the calculation generates a negative result, the output is black.
+.PP
+The computation is unstable against periodic structures with size 2 in
+the vertical direction.
+
+.UN options
+.SH OPTIONS
+.PP
+In addition to the options common to all programs based on libnetpbm
+(most notably \fB-quiet\fP, see 
+.UR index.html#commonoptions
+ Common Options
+.UE
+\&), \fBpgmabel\fP recognizes the following
+command line options:
+.PP
+You can abbreviate any option to its shortest unique prefix.
+
+
+
+.TP
+\fB-help\fP
+Prints a help message.
+
+.TP
+\fB-axis\fP \fIaxis\fP
+Position of the axis of symmetry in the image in pixels from the left
+edge of the image.  Default is the center of the image.
+
+.TP
+\fB-factor\fP \fIfactor\fP
+User defined factor for enhancement of the output.  Use a \fIfactor\fP
+less than 1 for decreasing gary values.  Default is 1.0.
+
+.TP
+\fB-pixsize\fP \fIpixsize\fP
+The size of a pixel for getting scale invariant.  Default is 0.1.
+
+.TP
+\fB-left\fP
+Calculate only the left side of the image.  You cannot specify both
+\fBleft\fP and \fBright\fP.
+
+.TP
+\fB-right\fP
+Analogous to \fB-left\fP.
+
+.TP
+\fB-verbose\fP
+print information about the calculation.
+
+
+
+.UN example
+.SH EXAMPLE
+.PP
+Rotate a PGM image to get an image with a vertical axis of symmetry,
+then calculate the cross section:
+
+.nf
+    pnmrotate 90 file.pgm | pgmabel -axis 140 >cross_section.pgm
+
+.fi
+
+.UN seealso
+.SH SEE ALSO
+.BR "pnmrotate" (1)\c
+\&,
+.BR "pgm" (1)\c
+\&,
+
+.UN history
+.SH HISTORY
+.PP
+This program was added to Netpbm in Release 10.3 (June 2002).
+
+.UN author
+.SH AUTHOR
+.PP
+Volker Schmidt (lefti@voyager.boerde.de)
+.PP
+Copyright (C) 1997-2002 German Aerospace research establishment
+.SH DOCUMENT SOURCE
+This manual page was generated by the Netpbm tool 'makeman' from HTML
+source.  The master documentation is at
+.IP
+.B http://netpbm.sourceforge.net/doc/pgmabel.html
+.PP
+\ No newline at end of file