CompuServe Thread

#IFF TO GIF CONVERSION

7 messages in this thread
#112659From: Aegis DevelopmentMar 7, 1988 5:26 PM
Please take a look at DigiView IP files viewed at 640 x 400 x 256 colors first. (Dithering can make a difference).
#112663From: John DraperMar 7, 1988 6:45 PM
Yes, dithering can make a difference. I maintain though, that dithering is less to be desired than the full range of colours. I feel that GIF as currently implemented, ignores a significant number of machines, one of which I happen to be interested in. When they support my machine, I'll re-evaluate my thoughts on it. Regards, Larry.
#112683From: Ben BlishMar 7, 1988 9:11 PM
I agree – dithering is a stop-gap process intended only to fill a void where real color cannot be used for some reason – and it should never be forgotten or ignored that dithering costs you resolution spatially, in return for the colors it provides. –Ben–
#112774From: Aegis DevelopmentMar 8, 1988 1:42 PM
Take a look at 256 color 640 x 400 Digiview stuff. I think you'll be surprized. A deep (24 bit) Pallette helps also…
#112898From: John DraperMar 9, 1988 12:56 AM
Surprised I may be, but I still maintain that the current implementation of GIF falls so far short of the Amiga (and other, even more colourful machines) capability, that I have little use for it. To limit it to 156 colours shows me that the authors were all to willing to cater to big blue and half eaten fruit, while ignoring the rest of the industry. It's an attitude I don't like much. Regards, Larry.
#112921From: Ben BlishMar 9, 1988 3:27 AM
Larry; 24 bits, what do you think? Shall we define a standard, here, now? 8r 8g 8b, *I* say. 32bit X and 32bit Y rectangular raster specifiers; Why? Consider output on a huge plotter bed… or other high precision sources. It's only a few bytes at the head of the file. I have _no_ idea why people do things like limit the colors to 512, address spaces to 8 mb, (or 16k, remember that?) And put in there run length, hamming, and mebbe two-three other that are known to be highly effective on image data. MAke sure it can be in biplane or word formats. What's the big deal, anyway? They must have had intel people do the GIF spec, that's all *I* can think of. <smirk> <running away> –Ben–
#112996From: John DraperMar 9, 1988 8:37 PM
Ben, I'm in complete agreement with your seniments. (how's that for a change?) One should always figure on what will show up in the next 5 years, double it a few times, and define standards that will handle it, then define methods of extending the standard. After all, we should have learned by now that all 10 year predictions that are at all 'in the right direction' turn out to be 3 year predictions. Regards, Larry.