-------- Original Message -------- Subject: Re: centroid size and different distances from the object Date: Tue, 17 Nov 2009 05:59:49 -0700 From: [email protected] To: morphmet <[email protected]> References: <[email protected]> I think one should generally avoid using photos taken under uncontrolled conditions for measurements or landmarking of 3D objects, for parallaxe will lead to distortions depending on camera distance and position. Having variable camera setups will just add more noise. For an example, see Friess, M. (2003) An application of the relative warps analysis to problems in human paleontology - with notes on raw data accuracy. Image analysis and stereology 22: 63-72. cheers, Martin Quoting morphmet <[email protected]>:
-------- Original Message -------- Subject: centroid size and different distances from the object Date: Mon, 16 Nov 2009 11:06:26 GMT From: tina klenovsek <[email protected]> To: [email protected] Please help! I have a collection of photos of mammal skulls that I took for morphometric analysis. But now I got new specimens of the same species that I would like to include into the already mentioned analysis. The problem is, I can't photograph new specimens under the exact conditions I photographed the first. Especially the DISTANCE of the camera from the skull is the problem. I can't photo the old again because they have been borrowed from many different museums and have already been returned. What shall I do? I need to calculate CENTROID SIZE for all specimens. Is this possible? I also don't have any scale on the old photos, but I know the exact length and width of every skull, is this enough? Please help me. I don' want all my old photos to go to waste. Thank you in advance! Tina -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
-- Replies will be sent to the list. For more information visit http://www.morphometrics.org
