Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!ginosko!uunet!convex!eugene!swarren
From: swarren@eugene.uucp (Steve Warren)
Newsgroups: comp.sys.amiga
Subject: Re: RGB to HAM IFF
Message-ID: <1976@convex.UUCP>
Date: 6 Oct 89 16:24:17 GMT
References: <495@nigel.udel.EDU> <333@amgraf.UUCP>
Sender: news@convex.UUCP
Reply-To: swarren@eugene.UUCP (Steve Warren)
Organization: Convex Computer Corporation, Richardson, Tx.
Lines: 33

In article <333@amgraf.UUCP> huver@amgraf.UUCP (Huver) writes:

>In article <495@nigel.udel.EDU>, webb@udel.edu (David Webb) forwarded comment
>from Fred Mitchell (mitchell@cbmvax.uucp) on converting RGB bitmap to HAM:

  [...bitplane reduction, 16-color palette picking stuff deleted]

>But the original question was:

>>>   Has anyone worked out a method of converting RGBs to HAM. I have
>>>   three B/W images (8 bits/pixel), and I would like to covert them
>>>   to a HAM image. If somebody could show me the way I would not writing
>>>   the C-code and making it public...
             ...
>For original poster's benefit: HAM is for color, not B/W, display.  Its only
>purpose in life is to let you show 4096 colors, not 4096 gray levels, from a
>16-entry color palette.

Well, I think he meant that he has three grey-scales of the image, one each
for the red, green, and blue planes, and he wants to combine them into
a single ham image.

I never used it myself, but it seems like the digiview digitizer
came with some software that does that (it uses a filter to digitize
the image in three passes).

Hope this helps.

Regards,

--Steve
-------------------------------------------------------------------------
	  {uunet,sun}!convex!swarren; swarren@convex.COM