\
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.TH "Pamwipeout User Manual" 0 "26 February 2011" "netpbm documentation"

.SH NAME
pamwipeout - replace detail with smooth gradient from one edge to the other

.UN synopsis
.SH SYNOPSIS
\fBpamwipeout\fP
{\fB-lr | -tb\fP}
[\fB\fIfilename\fP\fP]
.PP
Minimum unique abbreviation of options is acceptable. 
You may use double hyphens instead of single hyphen to denote options.

.UN description
.SH DESCRIPTION
.PP
This program is part of
.BR "Netpbm" (1)\c
\&.
.PP
\fBpamwipeout\fP replaces every row or column (as directed) with a smooth
gradient between the pixel values at each edge.  You can use it in combination
with \fBpamcut\fP and \fBpnmpaste\fP / \fBpamcomp\fP to remove unwanted
parts of a larger image.
.PP
In \fBtop-bottom\fP mode, the program reads the whole image into memory
before it can start processing.  In \fBleft-right\fP it will read the image a
row at the time, process that row and write it to the output file.  Therefore,
in case of very large images, it may be better to use instead of
"\fBpamwipeout -tb\fP" a pipe of "\fBpamflip -cw | pamwipeout -lr | pamflip
-ccw\fP".

.UN parameters
.SH PARAMETERS
.PP
\fB\fIFilename\fP\fP is the name of the input file. If you don't
specify this, \fBpamwipeout\fP reads the image from Standard Input.

.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
\&), \fBpamwipeout\fP recognizes the following
command line options:


.TP
\fB-tb\fP | \fB-lr\fP
.sp
This option chooses between a vertical and a horizontal gradient.  You must
specify one of these, but not both.



.UN seealso
.SH SEE ALSO
.BR "pam" (1)\c
\& and
.BR "pamflip" (1)\c
\&,
.BR "pamcut" (1)\c
\&,
.BR "pamcomp" (1)\c
\&,
.BR "pnmpaste" (1)\c
\&.

.UN history
.SH HISTORY
.PP
\fBpamwipeout\fP was new in Netpbm 10.54 (March 2011).
.PP
A predecessor program (not part of Netpbm) was called \fBpnmblend\fP.
  
.UN authors
.SH AUTHORS
.PP
\fIWillem van Schaik\fP
wrote this program in January 2011 and contributed it to Netpbm.
.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/pamwipeout.html
.PP