Re: Wondering About Apple II video digitizing

[pubpc1@library.ucla.edu]

lockwood@ecs.csun.edu (James Lockwood) wrote:
>Mitchell Spector (spec@vax2.concordia.ca) wrote:
>[in response to my stating that the Vision cards (AST, Visionary,
>etc.) generate raw data that is stored as a true color image]
>>     That is _not_ TrueColor, in fact it is not even HiColor. Images that
>> qualify as either hold 24-bit or 16-bit color information. I suppose you
>> could use an Amiga in HAM mode to display all those 4096 colors, or a PC
>> or Mac of course (either way, custom software is required).
>
>According to the earliest use of the term "TrueColor" that I know of
>(MIT X10 internal spec), bit depth has nothing to do with it.  TrueColor
>displays must implement a fixed word to color mapping without a palette
>in the way.
>
>-James

James, that's the definition I was using too when I replied to
Mitchell.  When I refered to "true color image," I was using the
terminology of graphics software like Prism.  Specifically, a true
color image is raw data that is stored in a form in which all the
original colors are present.  SuperConvert also uses the same
terminology, if I am not mistaken.  To display a graphic on a IIGS
requires that a palette or palettes be selected and the graphic
remapped.  Images in which the palette information is stored along
with the pixels (such as GIFs or SHR screens) are not "true color"
in this terminology, whereas TIFs or the 12-bit color capture
raw data files from Visionary are.

-Scott G.