Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!feed.xsnews.nl!border-2.ams.xsnews.nl!feeder.xennanews.com!feeder3!nf38.xennanews.com!not-for-mail From: Cecil Westerhof Newsgroups: comp.lang.postscript Subject: Re: Sometimes noise and resources about colours Organization: Decebal Computing References: <87r4nhl5on.fsf@Compaq.site.inet> <87ip8tl2do.fsf@Compaq.site.inet> <87d2z0ksci.fsf@Compaq.site.inet> <6MQss.277223$g62.79799@fx06.am4> X-Homepage: http://www.decebal.nl/ Date: Mon, 26 Nov 2012 23:19:59 +0100 Message-ID: <874nkcknw0.fsf@Compaq.site.inet> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) Cancel-Lock: sha1:TKgY/wXgilbgYL0ThFJzDAKvfMc= MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Complaints-To: abuse@xennanews.com Lines: 59 NNTP-Posting-Host: 84.53.123.169 (84.53.123.169) NNTP-Posting-Date: Mon, 26 Nov 2012 23:29:24 +0100 Xref: csiph.com comp.lang.postscript:1106 Op maandag 26 nov 2012 22:00 CET schreef Chris: >>>> The generated files are posted at: >>>> http://decebal.nl/postscript/keepYourHead.png >>>> http://decebal.nl/postscript/keepYourHead2.png >>> >>> I don't see any "noise" in those. I do see that that the first one >>> looks like it is anti-aliased (hence the slight fuzziness around the >>> glyphs), whilst the second is not. If you want anti-aliased output >>> direct from Ghostscript, lookup the TextAlphaBits and GraphicsAlphaBits >>> command line options. >> >> I mean the anti-aliasing. And I really see it in both. I do not want >> anti-aliasing. I'll look into the commands you gave. The option >> +antialias with convert does not work very well. When converting from >> the pdf there is already some fuzziness. So I should find a way to >> prevent it cropping up in the pdf. > > I don't see any anti-aliasing effects in the second image > (keepYourHead2.png), however much I zoom in. Is it possible you're seeing > scaling artefacts from the image viewer you are using? Yep, sorry for the noise. :-( >>>> By the way, I even see noise in the pdf, but less and only under the >>>> text: >>>> http://decebal.nl/postscript/keepYourHead.pdf >>> >>> Again, I don't see any noise in that, using evince/poppler, xpdf, >>> Ghostscript and Acrobat. >> >> If you look under the letters, there is a little shadow. > > Nope, don't see it. What are you using to view the PDF? Adobe reader, but when I increased the zoom to 6400% there was nothing. So adobe put me on the wrong leg I am afraid. >> I do not see fuzziness at: >> https://www.facebook.com/photo.php?fbid=445065655531047 > > That image is definitely anti-aliased. If you zoom in a bit, you can > clearly see the outline "softening" around the characters. I suspect the > effect is less obvious at normal zoom levels because the glyphs are > filled with a shading. So in future I should use shading. :-D Well, I have some experimenting to do. As if I do not have enough to do. :-P Thank you for your patience. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof