Hi Marta,
the fastest and cheapest way that I know for taking up linear
measurements from pictures is:
1) digitize a landmark configuration with TPSdig (all landmarks that
you're considering for linear measurements) and introduce a scale factor
so that you'll have measurement in the appropriate unit;
2) use PAST (again freeware... see the link at SB morphometrics) for
computing an EDMA matrix and you'll have distances between all possible
pairs of landmarks for all your specimens;
3) select only those linear measurements that you need and, maybe, for
at least one of them check that results are correct (it can be done very
easily in excel with the Pythagorean theorem).
Good luck

Andrea

Andrea Cardini
Istituto di Medicina Legale e delle Assicurazioni
Universit degli Studi di Milano
via Mangiagalli 37
Milano 20133, Italy
tel. 0039 02 50315678/9
[EMAIL PROTECTED]

and

Division of Mammals, Department of Vertebrate Zoology 
NHB 390, MRC 108
National Museum of Natural History, Smithsonian Institution
P.O. BOX 37012
Washington, DC 20013-7012, USA
tel. 202 3571476
[EMAIL PROTECTED]



>Dear list members,
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>I would like to take up linear measures, from jepg photographs. Does
anyone know 
>any free software for windows that does it?
>
>Thank very much Marta
>==
>Replies will be sent to list.
>For more information see
http://life.bio.sunysb.edu/morph/morphmet.html.
>
>


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