Idea for full motion video - MSX 2 - Screen 4 - NTSC 20fps - 16 shades of gray

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By albs_br

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19-09-2021, 18:37

wolf_ wrote:

Manuel just uploaded a pixel-perfect version of Dragon's Lair. Not entirely sure it's better than seeing a blurry version, but at least it's good for study.

https://www.youtube.com/watch?v=v75R_BQTCQo

Pretty cool!

Still a little blury, though.
My guess is that the algortihm for dithering is generating patterns with not so subtle differrences between adjacent frames.
Maybe with 16 shades of gray instead of colors these artifacts became less obvious.

By albs_br

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19-09-2021, 18:45

Grauw wrote:

Finding an optimal result is probably not feasible so an approximation will be needed, but even that seems difficult to approach while getting sensible results, especially since “pixel” sizes are different (4x1 vs 2x2).

Indeed, finding the optimal positioning of the sprites to get the better image is hard, BUT almost any sprites will improve the image. In other words, is better than nothing.

Grauw wrote:

To keep things simple I would skip the sprites part of the idea and focus on the basics. There’s also ready plenty of challenges there like setting up the conversion pipeline and colour reduction. I’m sure it’ll be fun to try even if it has no real practical applications other than to rick-roll the unsuspecting msx.org audience Smile.

That's an idea, but the sprites layer is the core of my idea, without it will be something common, that already have been done for MSX.

As for real world application, we are talking about a machine 30 years old. Everything here on MRC is hobby, even art. Just to flex brain muscles.

By albs_br

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26-09-2021, 23:54

Just perceived now: 16 shades of gray aren't possible on 9938/58: each RGB component is only 4-bits long, making it possible to have 8 values, one being full black and other full white. Only 6 shades of gray remaining...

By Manuel

Ascended (18133)

Manuel's picture

27-09-2021, 00:25

Excuse me, but 4 bit numbers go up to the number 15, don't they? But I think you mean it's 3-bits long, because it is Smile

By albs_br

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27-09-2021, 02:30

Oh yes.
I fixed one mistake by making another. oO

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