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IFD:PFDH WiSe22/Sources-24Oct22 (view source)
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Link to pdf presentatition: https://drive.google.com/drive/folders/1PaP46jq3G66uyDVl3jQk3cl5ZHDQZDB-?usp=share_link | |||
Image aquisition tips: | |||
Calibrated Photogrammetric Scale Bars (as an example, regarding targets) | any camera can do BUT higher resolution = higher model detail<br /> | ||
http://culturalheritageimaging.org/What_We_Offer/Gear/Scale_Bars/index.html | always shoot raw - process if necessary - export tiff / jpeg<br /> | ||
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<br /> | |||
constant aperture f/5.6-8.0 (f/11 max)<br /> | |||
keep whole object in focus<br /> | |||
iso as low as possible 100-800<br /> | |||
diffuse light - no hard shadows!<br /> | |||
camera orientation depending on subject - fill the frame<br /> | |||
increments of 10-15 degrees between pics<br /> | |||
overlap two thirds / 60% of last pic<br /> | |||
no over- or underexposed pics<br /> | |||
use gray card / color checker if necessary<br /> | |||
use printed measurement markers / tennis balls for big scenes / or when footage origin differs<br /> | |||
use tripod when low light or turntable<br /> | |||
shoot from as many angles as possible, up to down and around<br /> | |||
always take more pics than necessary<br /> | |||
Calibrated Photogrammetric Scale Bars (as an example, regarding targets)<br /> | |||
http://culturalheritageimaging.org/What_We_Offer/Gear/Scale_Bars/index.html<br /> | |||
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Aerial photogrammetry | Aerial photogrammetry | ||
https://www.researchgate.net/figure/Figure-12-Illustrate-the-geometry-of-aerial-photogrammetry-13_fig1_334164581 | https://www.researchgate.net/figure/Figure-12-Illustrate-the-geometry-of-aerial-photogrammetry-13_fig1_334164581<br /> | ||
https://en.wikipedia.org/wiki/Stereoplotter | https://en.wikipedia.org/wiki/Stereoplotter | ||