fotograph objects behind glass
Hi,
I have some objects behind glass which are difficult to get right.
I heared (from a photographer) i can use a circular polarisation filter which would filter out the reflections. Is that correct? Then what can i do?
I read that horizontally rotating the camera just creates panoramic images and isn't usefull but i began rotating vertically (frog perspective/birds eye views) because my straight views weren't enough for this small room (example_positions2.JPG).
Greetings
Felix
I have some objects behind glass which are difficult to get right.
I heared (from a photographer) i can use a circular polarisation filter which would filter out the reflections. Is that correct? Then what can i do?
I read that horizontally rotating the camera just creates panoramic images and isn't usefull but i began rotating vertically (frog perspective/birds eye views) because my straight views weren't enough for this small room (example_positions2.JPG).
Greetings
Felix
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Hi Felix,
There's a good guide for photogrammetry called "Photogrammetry in Paleontology" (http://www.jpaleontologicaltechniques.o ... 12_Jul.pdf - essentially all tips and tricks in this guide can be transferred to whatever discipline, so not really limited to Paleontology). The author uses PhotoScan for processing, but a lot of this info is relevant for any photogrammetry suite.
On page 6 there's a nice comparison between images taken behind glass without a polarisation filter vs with a polarisation filter. Polarisation filter definitely works, just buy one (they're cheap) and play around.
Concerning "rotating horizontally" - you're allowed to rotate the camera any angle you choose (horizontally, vertically, diagonally, whatever), just don't "pan" the camera like you would for a panorama, but instead make sure you move between each shot. From what I can tell from the camera positions in the screenshots you moved between each shot so that's perfectly fine.
Cheers,
Tom
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