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Phantom 4 sensor size, focal lenght

Discussion in 'Surveying and Mapping' started by vgo195, Jan 17, 2018.

  1. vgo195

    Joined:
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    Hi,
    I searched the internet for info about Phantom 4 sensor size. I need specifically the sensor width as it is required in some photogrammetric software.
    I found various answers 6.17mm, 6.20mm, 6.24mm, 6.31mm
    Does anyone know which one is correct?
    Also the focal length is fixed at 3.61mm but the software has the ability to adjust it during the aerotriangulation because it estimates also the other internal parameters of the camera.
    Should I keep the focal length fixed at 3.61mm and set the software to not adjust it?
    Also on different sets I get different values for the camera calibration. On the same photo set I also get different calibration parameters if use GCP's and I don't know which one to keep.
    Any thoughts?
     
  2. Meta4

    Meta4 Moderator
    Staff Member

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    According to DXO the sensor size is 4.7 x 6.3
    What software is asking for these details?
     
  3. vgo195

    Joined:
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    Bentley Contexcapture.
    Also Ι evaluate 3Dsurvey, Agisoft Photoscan and some other (not yet).
     
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