>
>
> ---------- Forwarded message ---------
> From: *Jorge A. Santiago-Blay* <
[hidden email]
> <mailto:
[hidden email]>>
> Date: Thu, Oct 15, 2020 at 10:46 AM
> Subject: Fwd: Borders of fossil leaves: enhancing their margins and edges
> To: <
[hidden email] <mailto:
[hidden email]>>
>
>
> Hi Herbie:
>
> Thanks for your feedback. Below are examples of what I meant:
>
> F-705 Scale_Jorge.jpg
> .
> Note, I do not know if ImageJ likes attachment and the requirements,
> hence my imageless email.
>
> If you wish to reply, my email is
[hidden email]
> <mailto:
[hidden email]>
>
> Gratefully,
>
> Jorge
>
> ---------- Forwarded message ---------
> From: *Herbie* <
[hidden email] <mailto:
[hidden email]>>
> Date: Thu, Oct 15, 2020 at 10:12 AM
> Subject: Re: Borders of fossil leaves: enhancing their margins and edges
> To: <
[hidden email] <mailto:
[hidden email]>>
>
>
> Greetings Jorge,
>
> without seeing *representative* (not best) samples of your data, it is
> impossible to give *reliable* advice.
>
> Perhaps the most important step in image analysis is image acquisition.
> How do you go about (illumination, colour, camera, optics)?
>
> Did you try to enhance the contrast by using oblique illumination or by
> coloured light?
>
> In any case, please optimize your image acquisition process by using
> professional equipment and techniques, because post hoc image processing
> in most cases can't compensate for suboptimum image acquisition and if,
> it will become rather costly.
>
> Regards
>
> Herbie
>
> ::::::::::::::::::::::::::::::::::::::::::::::::::::
> Am 15.10.20 um 15:24 schrieb Jorge A. Santiago-Blay:
> > Dear ImageJ users:
> >
> > A colleague of mine and I are calculating areas of fossil leaves. These
> > fossils often do not have a lot of contrast with the rest of the
> solid (the
> > so-called "rock" or, more technically,matrix). I have two questions:
> >
> > a. Is there a way to enhance the contrast of the leaf with respect
> to the
> > matrix so that we can trace it with more confidence? If "yes", what
> is the
> > sequence of commands in ImageJ.
> >
> > b. Sometimes the fossil is located on the border of the "rock". Is
> there a
> > way to tell ImageJ to automatically follow the edge of the rock until it
> > finds the origin of the area trace? It would be faster and more exact
> than
> > us, humans, doing it by hand.
> >
> > Gratefully,
> >
> > Jorge
> >
> > Jorge A. Santiago-Blay, PhD
> > *
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> >
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> >
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> Jorge A. Santiago-Blay, PhD
> _https://blaypublishers.com <
http://blaypublishers.com>_
>
> 1. Positive experiences for authors of papers published in */LEB/*
>
http://blaypublishers.com/testimonials/>
> 2. Free examples of papers published in */LEB/*:
>
http://blaypublishers.com/category/previous-issues/.
>
> 3. /Guidelines for Authors/ and page charges of */LEB/*:
>
http://blaypublishers.com/archives//./>
> 4. Want to subscribe to */LEB/*?
http://blaypublishers.com/subscriptions/>
>
http://blayjorge.wordpress.com/>
>
http://paleobiology.si.edu/staff/individuals/santiagoblay.cfm>
>
> --
> Jorge A. Santiago-Blay, PhD
> _https://blaypublishers.com <
http://blaypublishers.com>_
>
> 1. Positive experiences for authors of papers published in */LEB/*
>
http://blaypublishers.com/testimonials/>
> 2. Free examples of papers published in */LEB/*:
>
http://blaypublishers.com/category/previous-issues/.
>
> 3. /Guidelines for Authors/ and page charges of */LEB/*:
>
http://blaypublishers.com/archives//./>
> 4. Want to subscribe to */LEB/*?
http://blaypublishers.com/subscriptions/>
>
http://blayjorge.wordpress.com/>
>
http://paleobiology.si.edu/staff/individuals/santiagoblay.cfm