From Friedrich.Leisch@ci.tuwien.ac.at  Thu Sep  6 17:16:28 2001
From: Friedrich.Leisch@ci.tuwien.ac.at (Friedrich Leisch)
Date: Thu, 6 Sep 2001 18:16:28 +0200
Subject: [Rd] RFC: package pixmap
In-Reply-To: <Pine.LNX.4.21.0109032209130.25132-201000@reclus.nhh.no>
References: <15043.13319.787590.74960@galadriel.ci.tuwien.ac.at>
 <Pine.LNX.4.21.0109032209130.25132-201000@reclus.nhh.no>
Message-ID: <15255.41308.64191.671020@galadriel.ci.tuwien.ac.at>


There is a new package pixmap in $CRAN/src/contrib/Devel which
provides a first shot at a class hierarchy for bitmapped images (as
both bitmap and image are already taken I named it pixmap ... if
somebody has an idea for a better name, please let me know).

This is by no means meant to be final ... more like a basis for
discussion about classes for that purpose. It already has RGB, indexed
and grey bitmaps and conversion and plotting methods for those.

Thanks to Roger Bivand there are native R functions for
reading/writing PNM images, this replaces the respective functions in
the e1071 package. Hence, the netpbm libraries are no longer needed,
which should make life easier (especially on windows). Once we have
agreed on the basic classes it should be easy to support import/export
of other image formats like jpeg or png.

All feedback & code is welcome!

Best,
Fritz
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[Rd] RFC: package pixmap
Friedrich Leisch