Hah, the plot thickens. I can see the banding perfectly clearly on my everyday MacBook Pro. But on our big high-quality NEC monitor, I can't. But even on the big monitor, I can see the bands in that .png file.
Interesting because this is the first time there's actually been an observable effect of the fairly limited graphics card in the laptop. Thanks everyone for making me take a second look. -T On Thu, Jun 2, 2011 at 8:55 PM, Bob Sullivan <rf.sulli...@gmail.com> wrote: > Tim, > I don't see the banding either. > When I've had this kind of problem, > the banding was caused by display resolution. > Regards, Bob S. > > On Thu, Jun 2, 2011 at 2:30 PM, Charles Robinson <charl...@visi.com> wrote: >> On Jun 2, 2011, at 12:47, Larry Colen wrote: >> >>> >>> On Jun 2, 2011, at 12:11 AM, Tim Bray wrote: >>> >>>> Check out >>>> http://www.tbray.org/ongoing/When/201x/2011/06/01/-big/RUNE0790.jpg.html >>>> >>>> Look at the green bokeh-fied background and observe the obvious lines >>>> that look like elevation lines on a map, let's call them "bars", as >>>> the green brightness drops off. They ain't there in the .dng, and >>>> after the first cut, I specified 100% JPG quality and they're still >>>> obvious. >>>> >>>> It gets weird... I took a screen grab of the Lightroom window, in >>>> which none of those bars are visible, and saved to a .png file, using >>>> built-in OS X facilities, the PNG created by Preview. Obvious bars! I >>>> put it online at http://www.tbray.org/tmp/screen-grab.png - I thought >>>> .png was uncompressed! >>>> >>>> I'm sure that a silky-smooth jpg of this picture could be created. >>>> But I don't know how. >>> >>> It's not too bad here. I wonder if you're pulling an Ann and have >>> something set to too few bits. >>> >> >> I'm having the same issue - I cannot see the isobars/lines/whatever at all. >> Silky-smooth on my screen (Chrome browser on a Macbook) >> >> -Charles >> >> -- >> Charles Robinson - charl...@visi.com >> Minneapolis, MN >> http://charles.robinsontwins.org >> http://www.facebook.com/charles.robinson >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
