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Xref: sserve comp.os.386bsd.questions:14451 comp.os.linux.help:65448 Newsgroups: comp.os.386bsd.questions,comp.os.linux.help Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!uwm.edu!math.ohio-state.edu!sol.ctr.columbia.edu!usenet.ucs.indiana.edu!pegasus2.astro.indiana.edu!sdslavin From: sdslavin@pegasus2.astro.indiana.edu (Shawn Slavin) Subject: Problems with greyscaling in X apps Message-ID: <CzAGoq.DC@usenet.ucs.indiana.edu> Sender: news@usenet.ucs.indiana.edu (USENET News System) Nntp-Posting-Host: pegasus2.astro.indiana.edu Organization: Indiana University Date: Tue, 15 Nov 1994 03:07:37 GMT Lines: 34 Hi everyone. I have a question about greyscaling and colormaps under X. You may say, "This is not the right newsgroup," and I would agree with you, *except* that I have a problem with a couple applications on my FreeBSD system, using XFree86 2.1 (X11R5), which don't show problems on machines in my department, HP735s and Sparcs running X11R5. Ok, here is the problem: I have an astronomical image, in FITS format, which I can read into xv 3.00, which has an added FITS patch. I can create a PostScript file from this, preview it with Ghostview (at school) and print it on a laser printer. So far, no problems. However, I can preview it on my PC with Ghostview, and the faint backround and slightly brighter halo of the galaxy in the field will come out fine, but at a certain point the brightness level wraps itself around to black, as opposed to finding a saturation level at the brightest part of the colormap. I also see this effect on my PC directly viewing the FITS file with an image previewer called SAOimage, which I don't have a problem with at school. I find this strange, because in all other ways, I have had no problem compiling, installing, running, using, etc. these two programs. However, this "wrapping" effect puzzles me. In fact, I can use both Ghostview and SAOimage, albeit slowly, over a PPP connection with a workstation at school, and these very same images/PS files look fine on my monitor! So, does anyone "in the know" have a clue/suggestion/piece of wisdom/criticism for me? Also, I don't think that this is a platform dependent problem. But, I could be wrong (obviously). Thanks for your time. -- Shawn Slavin Indiana University Astronomy Internet: sdslavin@pegasus2.astro.indiana.edu