Search found 54 matches

by sam
Tue Sep 22, 2020 6:15 pm
Forum: Painting tricks
Topic: Image mapping : Peer review needed
Replies: 19
Views: 2634

Re: Image mapping : Peer review needed

It look like something is wrong with the rendering. The circle surrounding the A is not convex when projected (look at the upper right quadrant: it points inward when projected). Correct projection should preserve concavity of shapes & "straightness" of segments (look at the right side of the A-lett...
by sam
Sun Jul 19, 2020 10:40 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

I really like these "AOC 3.6" sprites! How do I get them? I downloaded the latest version but only have command line and I don't see how I can get them? It's not a aic setting I think? This is because you certainly get v1.2.. AIC settings comes with the future >> v1.3 << version (beware this is is ...
by sam
Tue May 26, 2020 11:34 am
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

This is because 1) it is fairly new 2) it is on another branch 3) it takes a very long time to generate.
by sam
Tue May 26, 2020 10:23 am
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

ibisum wrote:
Fri May 22, 2020 11:45 am
I'd love to have the .TAP files for all of these images, so I can dig into the bytes in a debugger and see for myself how the bits are set, one by on.
You can get them by clicking on the pictures there.
by sam
Fri May 22, 2020 7:42 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

Oh, I just want to avoid writing misleading infos in the README. You say "Using colors that are the same when inverted", which I interpret as c1+c2!=7. This might look restrictive since this doesn't lead to repeating consecutive lines. The first line allows colors (paper,ink) = (0,c1) and (7,c2) whi...
by sam
Fri May 22, 2020 2:00 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

Am I right to say that as long as you just modify the ink on the first column, and only use the invert bit on other columns, this is AIC ? Then for the color tuple to use is another matter that doesn't really matter the "AIC" label. Colors 7,7 and 7,3 are as valid pairs as is 6,3 (here I mean ink1,i...
by sam
Thu May 21, 2020 9:43 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

Paper is always black for AIC in my conversions (see above). When I write AIC=n,n I don't mean paper=inc=color #n, but odd line ink is color #n and even lines ink is color #n as well. So my question reduces to: can we tell that monochrome pictures are actually proper AIC ? Or should I stick to diffe...
by sam
Thu May 21, 2020 8:46 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

I mean: does the word "alternating" imply that the colors in the pair MUST be different. Asking differently, is the pair 1,1 a valid AIC mode? Alternating between red and red seem strange to me. (This is just a vocabulary/philosophy issue indeed.)
by sam
Thu May 21, 2020 7:13 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

Hmm I'm facing a philosophical issue. Is AIC=n,n a legit AIC mode ? I mean this is technically possible, but do Oric-users consider it as a legitimate couple of colors, or is this abusing the AIC definition ? BTW: couple 3,6 is very great. One does hardly produce bad AIC pictures with it from my tes...
by sam
Wed May 20, 2020 11:49 am
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

Although I'm usally not a huge fan of AIC or dithering (nice on small screen captures, sometimes painful on larger screens), I have to say all this work is really amazing. You guys are really talented in finding all the possible best combinations of colours, and doing this so fast! I think AIC can ...
by sam
Tue May 19, 2020 2:05 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

:shock: This looks really very good... So what exactly did you do here? If I can guess: he made a palette mixing 2 colors for the oric: 1+2, 1+3, 1+4, 1+5, 1+6, 1+7; 2+3, 2+4, 2+5, 2+6, 2+7; 3+4, 3+5, 3+6, 3+7; 4+5, 4+6, 4+7; 5+6, 5+7; 6+7 = 21 entries. He then map the original image to this palett...
by sam
Tue May 19, 2020 9:27 am
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

I actually quite like the one called "maybe". What settings did you use to generate that one? It is generated by the next version in the pipe. That version will contain some nice enhancements An algorithm to generate "Ordered" dithered image on the ORIC (NEW!). This works with AIC and non AIC. A se...
by sam
Mon May 18, 2020 11:21 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

sam wrote:
Mon May 18, 2020 4:05 pm
I'm about to think that ordered dither might be better for AIC but ordered dithering with Oric constraints is something different.
Well...
maybe.gif
maybe.gif (4.14 KiB) Viewed 1422 times
maybe_not.gif
maybe_not.gif (4.81 KiB) Viewed 1422 times
by sam
Mon May 18, 2020 4:05 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

There are more details, but the dither makes the whole thing looks a lot more "noisier". Sure! Error diffusion is just that: add noise to simulate missing color. I'm about to think that ordered dither might be better for AIC but ordered dithering with Oric constraints is something different. Anyway...
by sam
Mon May 18, 2020 11:41 am
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 110
Views: 24011

Re: Pictoric (was: New conversion algorithm)

8bit-Dude wrote:
Mon May 18, 2020 5:10 am
sam wrote:
Mon May 18, 2020 12:05 am
Am I right ?
Exactly!!! And additionally, is it possible to optionally specify those two colors (rather than let the software choose)?
If you chose the 2 colors, then the algorithm reduces to a plain dither.

I'll see what I can do on that topic. Stay tuned.