On Mar 19, 2008, at 11:14 AM, Tim Mimpriss wrote: > I have had some trouble with Spyder3Print on a new Mac Mini running > Leopard. The OS could see the sensor, but not S3P. Support Europe > suggested installing the latest version, but I already have 3.0.1 as > indicated in my support ticket, and I can find nothing laterer. > > It couldn't have been a software problem; maybe just a USB or power- over-USB problem. What USB port do you have it connected to? > Today it works! I measured a chart I had printed earlier only to find > that the profiled image had unpleasant crossovers in the grayscale > whereas the unprofiled image was fairly good on colour, but the > grayscale ramp was off: a really big jump between 90K and 100K. > > Sounds like bad measurements or other mistakes in the process to me. Have a look at the first video in this set and see if that helps: http://spyder.datacolor.com/learn_videos.php > I then wondered whether the spectro could be faulty. After cleaning > the > white pad and re-calibrating, I made some measurements off a Macbeth > ColorChecker. Here are some results: > > Lab a b > White 0.06 3.16 > Red 59 29 > Green -39 32 > Blue 15 -51 > > All of these readings seem to be somewhat off target, but the blue > especially so. Do I have a faulty spectro, or is there something I > have > missed? > > If you can email your measurement files to me at davem@..., I can take a look at them and see what the problem is. Use the File:Open Data command to open the folder containing the measurement files. Best regards, David Miller Senior Software Developer, Digital Color Solutions Datacolor
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Re: [colorvision_group] ?faulty spectro
2008-03-20 by David Miller
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