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- version 1.0, June 1st 1994
-
- "cpraw" a converter for ColourPic chunky to planes
-
- This utility is useful for those of you with a ColourPic (also known as
- SuperPic) video-digitizer. If you do not use one, stop reading and just
- spread this so that someone who might own one can use it.
-
- The ColourPic comes with exceptionally poor software. Therefore someone
- took the liberty of making a new program called Cabaret (and Cabaret Gold).
- This program is a vast improvement over the original software, however the
- digitzer is still better than the software. In other words: the software
- doesn't use all of the hardware's capabilities.
-
- A program that is able to handle the ColourPic's quality is ADpro, the art
- department. Regrettably there is no ColourPic driver for ADpro. This is
- where "cpraw" comes in. cpraw converts Cabaret's ".raw" format into 16 bit
- (65536 colours) ILBM format, which can be read by ADpro. So you will still
- use Cabaret to digitize, but ADpro can make MUCH better IFF pictures from
- the digitzer than Cabaret.
-
- The ".raw" format isn't compressed in any way. It cannot be read by ADpro
- directly because the ".raw" format is a chunky pixel format, whereas the
- Amiga uses bitplanes.
-
- I use an Amiga 500+, so I have an ECS chip-set. I don't know how this
- program will work on an AA machine; especially the part with ADpro should
- change when using AA.
-
- How to act:
-
- 1. Set up the digitizer and Cabaret
- 2. Digitze a picture and import it (number of colours doesn't matter)
- 3. Save the picture as "raw"
- 4. Open a Shell and type
-
- cpraw <NameOfTheRawFile >NameOfThe16bitILBM
-
- (which can also be concluded after trying "cpraw ?" which will result in
- "cpraw Usage: cpraw <infile >outfile")
-
- 5. Now load the 16bit (it's actually 15 bit + 1) ILBM file in ADpro and
- render it.
- 6. Admire the difference!
-
-
- Within ADpro
-
- The major advantage of ADpro over Cabaret is ADpro's dithering mode. This
- works best when there is room for dithering. After some experimenting I
- found out that it really shows when a picture is first converted to
- interlace and than dithered to HAM. Try:
-
- 1. Load 16 bit ILBM file
- 2. Scale to 200% (320×512, LoRes interlace)
- 3. Turn interlace ON
- 4. Choose HAM mode
- 5. Execute
-
- to do this I included an ARexx script called "cpraw.rexx", which should be
- included in this archive. To use it create a ".raw" picture and convert it
- using cpraw. Run adpro. Type (from within a shell): "rx cpraw" and the ARexx
- script will control ADpro for you. When using ADpro 2.5.0 or higher one can
- even put cpraw.rexx between the other user commands.
-
-
- Installing
-
- cpraw doesn't have to be installed. It doesn't use any library or handler.
- I suggest you put cpraw in your C: directory.
-
-
- Examples
-
- To show the huge improvement in quality I included some pictures in this
- archive. Each time one saved with Cabaret and once done with cpraw and ADpro.
- See for yourself.
-
- Of course the ColourPic isn't the best digitzer available (anymore) so
- don't expect miracles. Pictures with lots of different colours will look
- worse than those with less colours. Try a face and a colour-ful landscape
- and see the difference.
-
-
- Using DirectoryOpus
-
- When using DirectoryOpus, it might be useful to create a special "cpraw"
- button. The commands for this button should read:
-
- AmigaDOS C:cpraw <{fu} >{d}{o}.ILBM15 {Dr}
-
-
- Credits
-
- I didn't actually write cpraw; I just had the idea and the equipment. I did
- only write this doc-file and the ARexx script. I don't even own a ColourPic
- (however I have borrowed one for months now :-)
-
- The actual program has been written by a friend : Raymond
- He's a real C-wizard. Regrettably he never writes something really useful,
- this is an exception ...
- The digitzer has been supplied by another friend: Sander
- Try calling his BBS: +31 (0)2294-4442 "The Undiscovered BBS"
- or +31 (0)2294-1442 (second Node)
-
- -Ivo
-
- +----------------///-------+-----------------+----------------------------+
- | Ivo Kroone /// makes | Friends don't | Internet: |
- | \\\/// it | let friends use | ab2693@triton.heao.hsa.nl |
- | Only AMIGA \XX/ possible | MS-DOS. | (D.G.I.F. # 8156) |
- +--------------------------+-----------------+----------------------------+
-