RE: Epson 10000XL scanner and i1 profiler
RE: Epson 10000XL scanner and i1 profiler
- Subject: RE: Epson 10000XL scanner and i1 profiler
- From: "Miles, Peter" <email@hidden>
- Date: Sun, 31 Aug 2014 01:30:45 +0000
- Thread-topic: Epson 10000XL scanner and i1 profiler
Hi Graeme
Thats a really good point. I suspect that what you describe is exactly whats happing.
Now that I think about it, the clipping pattern looks very much like what i'd expect to see with the paper surface being illuminated by a side-grazing light.
I'd almost be tempted to try installing crossed polarized filters on the light and lens of the flat bed scanner. If there were some way to get the 10000xl to calibrate and work after loosing four stops of exposure.
Regards
Peter Miles
________________________________________
From: colorsync-users-bounces+p.miles=email@hidden [colorsync-users-bounces+p.miles=email@hidden] on behalf of Graeme Gill [email@hidden]
Sent: 30 August 2014 15:10
To: email@hidden >> ColorSync
Subject: Re: Epson 10000XL scanner and i1 profiler
Peter Miles wrote:
> I remembered that there is another 10000xl scanner on campus, and it's only a year or
> two old. I scanned the same sample of water color paper with epson scan with 'no color
> adjustment' and it too clipped the paper texture in almost exactly the same way and
> extent as my 10000xl. There is a third 10000xl that I might be able to get access to.
> But with both 10000xl's I've tried so far doing exactly the same thing to my water
> color paper texture, my issue is starting to look more like a 'Feature' of the Epson
> 10000xl rather than a mistake .
There is a possible explanation for this sort of behaviour, if the media is both
textured and at all glossy, and that is (typically) a scanner will illuminat at
such an angle to avoid the specular component, but with a textured surface some
of the specular will be captured, leading to more light than expected hitting
the sensor at certain pixels. Because the spatial resolution of a scanner is
much greater than a color instrument, this may not show up in a measurement.
Graeme Gill.
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