Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!uwm.edu!rutgers!mit-eddie!uw-beaver!ubc-cs!alberta!herald.usask.ca!telepro!oliphant From: oliphant@telepro.UUCP (Mike Oliphant) Newsgroups: comp.sys.amiga.programmer Subject: Re: How to increase grayscale levels? Message-ID: Date: 11 Mar 91 22:47:34 GMT References: <5082@mindlink.UUCP> Organization: TelePro Technologies Lines: 33 In article <5082@mindlink.UUCP> Harvey_Taylor@mindlink.UUCP (Harvey Taylor) writes: > >[Thank you Alex M. & Peter K. for previous answers in this discussion] > > Background: I want to display some large 256 level greyscale > video samples. The standard Amiga will output only 16 levels. > > So, I am trying to figure out the best way to increase the number of > greyscale levels viewable on the (my) Amiga. So far the candidates are: > > 1) Dithering > 2) GreyScale to HAM [SHAM, SHAMM, Dynamic whatever] > 3) A colour board > > Are there any other options? I've achieved some rather nice results by usings shades of purple to emulate 32 shades of grey. Here are the colors I use: UWORD colortable[32]={0x000,0x102,0x111,0x213,0x222,0x324,0x333,0x435,0x444, 0x546,0x555,0x657,0x666,0x768,0x777,0x879, 0x888,0x98a,0x999,0xa9b,0xaaa,0xbac,0xbbb,0xcbd,0xccc, 0xdce,0xddd,0xedf,0xeee,0xfef,0xfff,0xfff}; -- Mike Oliphant herald!telepro!oliphant or telepro!oliphant@herald.usask.ca FidoNet: (1:140/91) - ZMH only * * Call TelePro, the development system for DLG Professional * * Phone: +1 306 249 2352 2400/9600/14400 bps HST - FidoNet: (1:140/90) * +1 306 652 2084 300/1200/2400 bps *