Re: [stella] Some experiments in Interlaced graphics

[Glenn Saunders <mos6507@xxxxxxxxxxx>]

I checked this out, finally, on the real thing.

Oddly enough, I think the interlaced image looks worse because the 
dithering shows up more due to less overall flicker being evident.  But the 
flicker itself in the ICC is distracting too, so I can see people 
preferring one or the other depending on taste.  I do think the gaps where 
you have a high brightness color adjacent to a black background are much 
more noticeable in interlaced mode.

I'd like to see this approach on a different subject, like something that 
required less black pixels intermingled (i.e. a brighter image, maybe 
something mostly fleshtone).  Or maybe you could try an image that required 
less overall dithering, a less shaded image, like a 2D cartoon.  Garfield 
or something.

I think the approach has some potential and I'd like to see further 
experiments.



At 06:38 AM 12/28/2003, you wrote:
> There are a couple of interesting points to note.  Firstly, as the ICC
> system interleaves 3 frames, the data size is 3 'colour planes' (even though
> these are interleaved themselves).  Since the interlaced display only has
> field 0 and 1, I dropped one of the three ICC colour frames (remember, a
> whole frame isn't red or green or blue, it's lines of red AND green AND
> blue).  The result, then, is that the data required to display an
> interleaved, interlaced mario is only 2/3 of the size of that required for
> an interleaved chronocolour(TM) mario (simply because we're using only 2 of
> the 3 frames).  Remember, to run interlaced mode in z26, you must use the -!
> command line flag.  The binary "marioInterlaced.bin" demonstrates the first
> 'picture' interlaced image on a '2600, I think -- prior demos were just
> hand-drawn lines, etc.

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