Page 1 of 1

[Staff][Dev] 9-lvl Grayscale

Posted: Fri 25 May, 2012 1:20 pm
by tr1p1ea
Hi Guys,

Ive been messing around with random stuff (instead of finishing Desolate :S) and have come up with a flickerless 9-lvl grayscale, on the SE calcs at least.

I dont have any plans for it aside from a simple image viewer and some tools to convert BMP's into .8xp files to view on calc.

The viewer makes use of puCrunch and can decompress from either RAM or ROM.

Out of interest here is an image of a wolf in black & white, then 4-lvl, then 9-lvl to see the difference in detail (this img hasnt been touched up or anything, just straight converted down in colours, the lower lvls could be improved with a bit of work):

Image

Will have some test programs out soon, its a pitty wabbitemu doesnt like 9-lvl, it looks near perfect on calc (once tuned):

Image

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Sat 26 May, 2012 2:28 am
by benryves
Wow, that's very impressive (you're keeping busy!) :D

Will it run on non-SE calcs?

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Tue 29 May, 2012 4:34 am
by Art_of_camelot
I remember when you were first playing around with 8 levels and posted something similar (one of the pics was even a wolf :)). If i remember, some of the lighter and darker levels looked pretty similar and it was hard to tell them apart. Has this improved any? I'd also like a binary so I can throw it on my calc and see how it looks on hardware. :)

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Tue 29 May, 2012 8:05 am
by tr1p1ea
This will run on non-SE calcs however the interrupt timing will be different (and require tuning as the batteries discharge i assume).

There are some similarities between the lower level grays at this point, however im am still playing with the dithering pattern to try and even it out.

I will have something for people to test soon, and know that it is orders of magnitude better in quality when compared to the the older 8lvl tests.

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Fri 01 Jun, 2012 5:46 pm
by Madskillz
Looks cool, glad to see your still coding.

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Tue 12 Jun, 2012 11:48 am
by kalan_vod
Oh Patrick you still have the power to amaze me with your work!

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Wed 13 Jun, 2012 3:35 am
by tr1p1ea
Thanks kalan :).

I bought an 83+ off ebay (for $21.50AU delivered :)) and have been messing with the timing on the BE calcs to try and develop a user controlled tuning mechanism of sorts in an attempt to get as close to true flickerless as possible.

SE calcs will take advantage of crystal timers as demonstrated by Jim e and more recently by thepenguin as well.

Re: [Staff][Dev] 9-lvl Grayscale

Posted: Sun 30 Dec, 2012 11:17 am
by Art_of_camelot
Psst, you should post the demo program for this. :)