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CU Amiga Super CD-ROM 22
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CU Amiga Magazine's Super CD-ROM 22 (1998)(EMAP Images)(GB)[!][issue 1998-05].iso
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PPCLimboCWOS
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amiga.readme
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1998-02-20
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61 lines
NAME
limbo - fast 2D/3D fractal image compression
AMIGA SPECIFICATIONS
See the 'limbo.readme' for general information.
The Limbo program is currently only on a research or
experimental state!
A test run on the 'lenna' image (512 times 480) with a 68030
/68881:
o Encoding time : 276 [sec]
o Decoding time : about 20 [sec]
o Memory usage : over 3 [Mb]!
o PSNR : 32.10 [dB]
o Compression ratio: 8.92:1 = 11.21 % = 0.896 [bpp]
The Limbo encoder is very demanding for the hardware in
terms of computing power and graphics capabilities.
Personally I do not use the program on my 68030/40 [Mhz]
since its to slow, but perhaps other Amiga users with more
powerful CPU'S and better graphics cards may find it usable
(the program was first designed to run on a Silicon Graphics
Indy or a Sun Sparc Station!)
Currently I've only supplied the binaries for the 2D version
of the encoder, since the 3D version is even more demanding
than the 2D encoder.
NOTE: the directory structure specified in the limbo.readme
file MUST be present --- otherwise the Limbo encoder will
fail. If you find the directory structure annoying change it
by redefining the directories specified in 'defines.h' (i.e.
the ORGGFX,FCCODE, and CMPGFX defines).
The limbo encoder uses the PGM (8 BPP, grey scale) or PPM
(24-BPP, color) as image input/output formats. To encode an
IFF image it has to be exported to PGM or PPM first. I've
supplied the 'PPMPrev' code from the AmiNet (PPM.LZH)
written by Albert-Jan Brouwer. Furthermore I've supplied the
small dirty hack 'pgm2ppm' to convert PGM to PPM images.
The viewing of images is done by the 'xv.script', instead of
the xviewer program!
THANKS
Thanks to Albert-Jan Brouwer for his PPMPrev and a very big
thanks to Chris Coulson for checking out the code !!!
.carsten