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IFD:PFDH WiSe22/Sources-24Oct22 (view source)
Revision as of 07:22, 4 November 2022
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Image aquisition tips: | |||
any camera can do BUT higher resolution = higher model detail | any camera can do BUT higher resolution = higher model detail<br /> | ||
always shoot raw - process if necessary - export tiff / jpeg | always shoot raw - process if necessary - export tiff / jpeg<br /> | ||
use fixed focal length / 24mm - 50mm recommended | use fixed focal length / 24mm - 50mm recommended<br /> | ||
if variable zoom then keep it always at minimum or maximum length and don’t change it while shooting | if variable zoom then keep it always at minimum or maximum length and don’t change it while shooting<br /> | ||
constant aperture f/5.6-8.0 (f/11 max) | constant aperture f/5.6-8.0 (f/11 max)<br /> | ||
keep whole object in focus | keep whole object in focus<br /> | ||
iso as low as possible 100-800 | iso as low as possible 100-800<br /> | ||
diffuse light - no hard shadows! | diffuse light - no hard shadows!<br /> | ||
camera orientation depending on subject - fill the frame | camera orientation depending on subject - fill the frame<br /> | ||
increments of 10-15 degrees between pics | increments of 10-15 degrees between pics<br /> | ||
overlap two thirds / 60% of last pic | overlap two thirds / 60% of last pic<br /> | ||
no over- or underexposed pics | no over- or underexposed pics<br /> | ||
use gray card / color checker if necessary | use gray card / color checker if necessary<br /> | ||
use printed measurement markers / tennis balls for big scenes / or when footage origin differs | use printed measurement markers / tennis balls for big scenes / or when footage origin differs<br /> | ||
use tripod when low light or turntable | use tripod when low light or turntable<br /> | ||
shoot from as many angles as possible, up to down and around | shoot from as many angles as possible, up to down and around<br /> | ||
always take more pics than necessary | always take more pics than necessary<br /> | ||
Calibrated Photogrammetric Scale Bars (as an example, regarding targets) | Calibrated Photogrammetric Scale Bars (as an example, regarding targets)<br /> | ||
http://culturalheritageimaging.org/What_We_Offer/Gear/Scale_Bars/index.html | http://culturalheritageimaging.org/What_We_Offer/Gear/Scale_Bars/index.html<br /> | ||
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