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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2014-04-25 02:48:09 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2014-04-25 02:48:09 +0000 |
| commit | 1fad62acf077788aa5266935b76831e2350c9099 (patch) | |
| tree | 97d5970ca272c701cfb5597998e1d0ecb6346902 /sgitopnm.html | |
| parent | 9a966f0a29c37d1980e33f6970b65bbcbb5c146b (diff) | |
| download | netpbm-mirror-1fad62acf077788aa5266935b76831e2350c9099.tar.gz netpbm-mirror-1fad62acf077788aa5266935b76831e2350c9099.tar.xz netpbm-mirror-1fad62acf077788aa5266935b76831e2350c9099.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@2195 9d0c8265-081b-0410-96cb-a4ca84ce46f8
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| -rw-r--r-- | sgitopnm.html | 80 |
1 files changed, 46 insertions, 34 deletions
diff --git a/sgitopnm.html b/sgitopnm.html index c0f23f01..76671f6c 100644 --- a/sgitopnm.html +++ b/sgitopnm.html @@ -2,16 +2,15 @@ <HTML><HEAD><TITLE>Sgitopnm User Manual</TITLE></HEAD> <BODY> <H1>sgitopnm</H1> -Updated: 29 Jul 2000 +Updated: 25 April 2014 <BR> <A HREF="#index">Table Of Contents</A> -<A NAME="lbAB"> </A> + <H2>NAME</H2> sgitopnm - convert a SGI image file to PNM -<A NAME="lbAC"> </A> -<H2>SYNOPSIS</H2> +<H2 id="synopsis">SYNOPSIS</H2> <B>sgitopnm</B> @@ -19,68 +18,81 @@ sgitopnm - convert a SGI image file to PNM [<B>-channel</B> <I>c</I>] -[<I>SGIfile</I>] +[<I>SgiFileName</I>] + -<A NAME="lbAD"> </A> -<H2>DESCRIPTION</H2> +<H2 id="description">DESCRIPTION</H2> <p>This program is part of <a href="index.html">Netpbm</a>. <p><b>sgitopnm</b> reads an SGI image file as input and produces a PGM -image for a 2-dimensional (1 channel) input file, and a PPM image for +image for a 2-dimensional (1- or 2-channel) input file, and a PPM image for a 3-dimensional (3 or more channels) input file. <P>Alternatively, the program produces a PGM image of any one of the channels in the input file. -<A NAME="lbAE"> </A> -<H2>OPTIONS</H2> +<p>Before Netpbm 10.67 (June 2014), <b>sgitopnm</b> does not work on 2-channel +SGI images. It fails if you try. + +<p>If you don't specify the <i>SgiFileName</i> argument, input is from +Standard Input. + +<p>Before Netpbm 10.67 (June 2014), <b>sgitopnm</b> requires its input to +be a seekable file, so for example you can't feed it from a pipe. + + +<H2 id="options">OPTIONS</H2> <DL COMPACT> <DT><B>-verbose</B> <DD>Give some information about the SGI image file. -<DT><B>-channel</B> <I>c</I> +<DT><B>-channel</B> <I>n</I> + +<DD>Extract channel <I>n</I> of the image as a PGM image. + +<p>Without this option, <B>sgitopnm</B> extracts the first 3 channels as a PPM +image or, if the input has 1 or 2 channels, extracts the first channel as a +PGM image. -<DD>Extract channel <I>c</I> of the image as a PGM image. Without -this option, <B>sgitopnm</B> extracts the first 3 channels as a PPM -image or, if the input has only 1 channel, extracts that as a PGM -image, and if the input has 2 channels, fails. +<p>A 2-channel image is grayscale plus alpha (transparency), so you can get +the transparency information with <b>-channel=2</b>. You could then +combine them into a PAM image of tuple type GRAYSCALE_ALPHA with +<b>pamstack</b>. </DL> -<A NAME="lbAF"> </A> -<H2>REFERENCES</H2> +<H2 id="references">REFERENCES</H2> SGI Image File Format documentation (draft v0.95) by Paul Haeberli (<A -HREF="mailto:paul@sgi.com">paul@sgi.com</A>). Available via ftp at +HREF="mailto:paul@sgi.com">paul@sgi.com</A>). Available via FTP at sgi.com:graphics/SGIIMAGESPEC. -<A NAME="lbAG"> </A> -<H2>SEE ALSO</H2> +<H2 id="seealso">SEE ALSO</H2> <B><A HREF="pnm.html">pnm</A></B>, +<B><A HREF="pam.html">pam</A></B>, +<B><A HREF="pnmtosgi.html">pnmtosgi</A></B>, +<B><A HREF="pamstack.html">pamstack</A></B> -<B><A HREF="pnmtosgi.html">pnmtosgi</A></B> -<A NAME="lbAH"> </A> -<H2>AUTHOR</H2> +<H2 id="author">AUTHOR</H2> -<p>Copyright (C) 1994 by Ingo Wilken (<A -HREF="mailto:Ingo.Wilken@informatik.uni-oldenburg.de">Ingo.Wilken@informatik.uni-oldenburg.de</A>) +<p>Copyright (C) 1994 by Ingo Wilken +(<A HREF="mailto:Ingo.Wilken@informatik.uni-oldenburg.de"> +Ingo.Wilken@informatik.uni-oldenburg.de</A>) <HR> -<A NAME="index"> </A> -<H2>Table Of Contents</H2> +<H2 id="index">Table Of Contents</H2> <UL> -<LI><A HREF="#lbAB">NAME</A> -<LI><A HREF="#lbAC">SYNOPSIS</A> -<LI><A HREF="#lbAD">DESCRIPTION</A> -<LI><A HREF="#lbAE">OPTIONS</A> -<LI><A HREF="#lbAF">REFERENCES</A> -<LI><A HREF="#lbAG">SEE ALSO</A> -<LI><A HREF="#lbAH">AUTHOR</A> +<LI><A HREF="#synopsis">SYNOPSIS</A> +<LI><A HREF="#description">DESCRIPTION</A> +<LI><A HREF="#options">OPTIONS</A> +<LI><A HREF="#references">REFERENCES</A> +<LI><A HREF="#seealso">SEE ALSO</A> +<LI><A HREF="#author">AUTHOR</A> </UL> </BODY> </HTML> |