Fun with HAM
Just for a bit of silly seasonal Amiga-related fun, here's a picture of ham converted into HAM.
http://i638.photobucket.com/albums/u...g?t=1292765525 http://i638.photobucket.com/albums/u...g?t=1292765305 The image on the left is 24-bit, the one on the right was converted to HAM-6 by Vidi Amiga software. This mode was possible on the high-end Amiga 1000 in 1985 and the affordable Amiga 500 in 1987. In contrast, VGA came out in 1987 for high-end PCs and was limited to 256 colours in low resolution. Compare our HAM image on the left with a 256 colour VGA image. Amiga had quite the edge (even if we improve the 256 colour dithering): http://i638.photobucket.com/albums/u...g?t=1292765305 http://i638.photobucket.com/albums/u...g?t=1292765839 Funny how Commodore originally thought this was a useless feature and wanted it taken out. :D P.S. The Wikipedia article accurately describes HAM as a form of hardware-based lossy compression. CDXL video which utilised HAM used no other form of compression. I suppose the spiritual heir to HAM today would be specialised GPU hardware for decompressing high-definition video, as found in many graphics cards and mobile devices. |
Yummy HAM indeed :)
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Have you ever tried PCHG HAM (lowres or lowres laced ) on an OCS or ECS machine ?
If not, try it, you would not believe your eyes ! ;) |
To be fair to VGA, it has a smaller palette, and in your example picture, the conversion is not very cool, dithering could have been worked a lot more. This depends on the image converter.
Ham was neat but it's pretty horrible with its colour fringeing, reminds me of Spectrum color clash bugs. |
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right on, smear it in my face xD
Thanks TCD! |
Hehe, Toni told me off about it here a while ago :D
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Yo dawg we heard you liked ham... |
The VGA ham looks like it is radioactive :sad
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HAM would have made so much sense if the Amiga would have been using HSV and not RGB as was initially intended. Its still a very very cool graphic mode though.
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The difference is we had to wait for a proper 256 colour mode for 7 more years and it would be 8x slower than VGA ;)
HAM6 was good, but useless for games, unlike VGA which was no different to writing games in 32 colour mode on an A500/1000/2000. Fantastic for still images, I spent months perfecting my Digi-view setup..MONTHS! lol |
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