Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!shearson.com!newshost!wbrand From: wbrand@krishna.shearson.com (Willy Brandsdorfer) Newsgroups: comp.sys.amiga.graphics Subject: Re: need 24bit->8bit quantizer with "locked" colormap/pallete Message-ID: Date: 10 Jun 91 12:18:38 GMT References: <62130@masscomp.westford.ccur.com> Sender: news@shearson.com (News) Reply-To: wbrand@krishna.shearson.com Organization: Lehman Brothers Lines: 32 In-Reply-To: mark@masscomp.westford.ccur.com's message of 6 Jun 91 20:31:58 GMT In article <62130@masscomp.westford.ccur.com> mark@masscomp.westford.ccur.com (Mark Thompson) writes: > I am working on a demo of X11 image load speed on a system at work and I > need to do the appropriate conversion to get a LightWave generated > animation into an 8bit pseudo color format with a constant color pallete. > Does anybody know of a method to quantize a series of 24bit images to > 8bits using the same colormap for all the images in the sequence (based > on maybe the first image or whatever)? I need to do this on a unix/X based > workstation or an Amiga. I had hoped xv or the pbmplus tools had this > capability but they don't appear to as far as I can tell. A friend of mine > who owns ADPro claims that it can do this, but the GIFs I have seen ADPro > create look terrible compared to the ones I have converted using the PD X11 > program xv. Is it possible he did his conversions improperly. He said he > selected a pallete of 256 colors. Anyway, the 8bit output format doesn't > matter provided it is color and I can use pbmplus to convert it to binary > ppm format. The input 24bit format can either be Amiga IFF24, ppm binary, > or raw RGB. I'll probably end up writing my own code to do this but I thought > I'd check first. I'm just curious, once you got it to X, how would you animate it. Is there a PD X pageflipper program? ------------------------------------------------------------------------------ William Brandsdorfer | UUCP: !uunet!shearson.com!wbrand Lehman Brothers | ARPA: wbrand@shearson.com 388 Greenwich St. | Voice: (212) 464-3835 New York, N.Y. 10013 -------------------------------------------------------------------------------