I think Will's trick has fixed my problem but just for interest's
sake did the chunks I sent from work come through?
I've never used masks as I think Marie preferred different methods when she
trained me up in Photoshop in 2005.
From: SciArt-L Discussion List-for Natural Science Illustration-
[mailto:[log in to unmask]] On Behalf Of Britt Griswold
Sent: Wednesday, 28 November 2012 7:10 AM
To: [log in to unmask]
Subject: Re: [SCIART] any tricks for cutting out a whole heap of pieces off
a grey background?
What sort of color difference are there. If there is a distinct color
difference with the background
you might be able to pull a mask off that. If you want to send me small hunk
at full resolution I
can have a look.
On 11/27/12 4:05 PM, Geoff Thompson wrote:
> Dear All,
> I've photographed 6604 numbered fragments of an ancient
Egyptian book of the dead.
> They had to be photographed on an acid-free grey background and are now on
that under glass.
> They are 3,500 years old and were very fragile to handle. I photographed
them with the 200 megapixel
> Hasselblad and sharpened them with Les Walking's sophisticated
smart-sharpen followed by his tweaked
> unsharp mask.
> It's planned to try and put them together on a super computer digitally.
Each one is numbered with a
> hand-cut label.
> In Photoshop I have been copying the base layer twice, adjusting the
contrast a long way on one
> layer, using the magic eraser, selecting all the pixels remaining, turning
off that layer, clicking
> on the next one up, checking the selection and adding to it if necessary,
reversing the selection
> and deleting.
> This gives a good result but there are speckles remaining from the texture
of the acid-free card.
> Has anyone any suggestions to improve the result?
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