Re: Epson 10000XL scanner and i1 profiler
Re: Epson 10000XL scanner and i1 profiler
- Subject: Re: Epson 10000XL scanner and i1 profiler
- From: Ernst Dinkla <email@hidden>
- Date: Sat, 30 Aug 2014 12:22:53 +0200
Graeme,
Do you have a particular paper in mind? Real gloss textured papers are not
that widely spread. I thought about the Bonjet Art Canvas/Leather/Silk
Glossy papers that could create that effect having quite a rough texture,
strong gloss + a high OBA content. But otherwise the usual textured glossy
papers are not glossy enough and the fine texture will not be specular
enough to cause that effect at the usual scan resolutions for reflective
originals.
I will scan a collage of some paper samples from the 600 I have here that
would represent the paper white extremes for scanning. On the Epson 3200
where I replaced the calibration strip and on some other scanners I happen
to have. With Vuescan.
I wonder whether the scanner calibration strips shift their white in aging.
Ideally they shouldn't but it might be easier to use a strip with OBA
content where so much of the originals scanned have OBA content. Most
reflective scanners aim at reproducing chromogenic CMY dyes too and fail at
painted originals etc. In the past Image-engineering did a test on the last
aspect for some scanner models.
http://www.image-engineering.de/library/testreports/testreport_scanner_color_re.pdf
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
April 2014, 600+ inkjet media white spectral plots.
On Sat, Aug 30, 2014 at 5:10 AM, Graeme Gill <email@hidden> wrote:
> 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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