Thanks !
Thanks !
At the 112 x 48 resolution I used, dither with or without error diffusion lost most of the image. Well, it would have looked fine standing back 6 feet or two metres or so, but what's the point if it looks bad at normal viewing disance?
I experimented with edge detection and GIMP filters like Posterize and Cartoonify reasoning they would tend to bring out the rough shapes in the image. I ended up doing some of it with Posterize and most with Cartoonify. The result is acceptable enough, but I do think the "tunnel" effects could be made to look a lot closer to the original.
3d rendering on ascii terminal, if you can, build and run the source ( http://www.a1k0n.net/2006/09/15/obfuscated-c-donut.html ), it's always pretty to see running.