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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2009-02-02 01:38:02 +0000 |
|---|---|---|
| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2009-02-02 01:38:02 +0000 |
| commit | f9f03b13de95b6b12d0f77d5b623d8fc83b8f69f (patch) | |
| tree | bc1466137c303c4c278fca4d537b4cd6f9333f58 /pnmscalefixed.html | |
| parent | fa56e35a2065bfd4f73c26ff9df7280104cff812 (diff) | |
| download | netpbm-mirror-f9f03b13de95b6b12d0f77d5b623d8fc83b8f69f.tar.gz netpbm-mirror-f9f03b13de95b6b12d0f77d5b623d8fc83b8f69f.tar.xz netpbm-mirror-f9f03b13de95b6b12d0f77d5b623d8fc83b8f69f.zip | |
"miscellaneous update"
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@836 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'pnmscalefixed.html')
| -rw-r--r-- | pnmscalefixed.html | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/pnmscalefixed.html b/pnmscalefixed.html index 58dfde35..0b7668a4 100644 --- a/pnmscalefixed.html +++ b/pnmscalefixed.html @@ -6,26 +6,25 @@ Updated: 18 November 2000 <BR> <A HREF="#index">Table Of Contents</A> -<A NAME="lbAB"> </A> <H2>NAME</H2> pnmscale - scale a PNM file quickly -<A NAME="lbAC"> </A> -<H2>DESCRIPTION</H2> +<H2 id="description">DESCRIPTION</H2> <p>This program is part of <a href="index.html">Netpbm</a>. -<B>pnmscalefixed</B> is the same thing as <B>pnmscale</B> except that +<B>pnmscalefixed</B> is like <B>pamscale</B> except that it uses fixed point arithmetic internally instead of floating point, which makes it run faster. In turn, it is less accurate and may -distort the image. +distort the image. It also lacks many of the features of <b>pamscale</b>. -<P>Use the <B>pnmscale</B> user manual with <B>pnmscalefixed</B>. This -document only describes the difference. +<P>Use the <B>pamscale</B> user manual with <B>pnmscalefixed</B>. This +document only describes the difference. Avoid any feature mentioned in +the <b>pamscale</b> manual as not existing before Netpbm 9.9. <P><B>pnmscalefixed</B> uses fixed point 12 bit arithmetic. By -contrast, <B>pnmscale</B> uses floating point arithmetic which on most +contrast, <B>pamscale</B> uses floating point arithmetic which on most machines is probably 24 bit precision. This makes <B>pnmscalefixed</B> run faster (30% faster in one experiment), but the imprecision can cause distortions at the right and bottom edges. @@ -57,15 +56,13 @@ consist of a single constant in the source code. Until there is a demonstrated need for that, though, the Netpbm maintainer wants to keep the safety cushion afforded by the original 12 bit precision. -<P><B>pnmscalefixed</B> does not have <B>pnmscale</b>'s <B>-nomix</B> +<P><B>pnmscalefixed</B> does not have <B>pamscale</b>'s <B>-nomix</B> option. <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">DESCRIPTION</A> +<LI><A HREF="#description">DESCRIPTION</A> </UL> </BODY> </HTML> |