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Author Topic: Import Cameras - Issues  (Read 1792 times)

Zim240

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Import Cameras - Issues
« on: February 24, 2018, 12:44:00 AM »
Good day,

I am importing cameras from external sources using the import camera function.

I am using bingo.dat format.

Below is the file content:

*   <____Photo_ID__><___Easting__><__Northing__><__Height_><___Phi__><__Omega_><__Kappa_><____Camera_ID_>
ORIA    07044634.jpg    374281.163    863977.346   1036.290    3.1500    0.1307   -3.0353         S000000
ORIA    07045014.jpg    374476.399    873007.337   1054.190    0.0515   -2.2880  121.6280         S000000
ORIA    07045017.jpg    374302.955    872910.869   1052.826    3.8781   -0.6670  120.1826         S000000

Also the camera information in bingo.dat

file_version: 1

begin gridgroup "Image deformation grids"
    enabled:     yes
    order_index: 0
    camera_name: "iXU1000-R (50mm)"
    description: "Calibration grid"

    begin grid "Image deformation grid 1"
        enabled:       yes
        inverse_scale: 1.000000
        columns:          27
        rows:             21
        description:   " "

        begin gridpoints
               -26.3040    -20.2381    -26.0000    -20.0000
               -24.2631    -20.2235    -24.0000    -20.0000
               -22.2250    -20.2087    -22.0000    -20.0000
               -20.1899    -20.1942    -20.0000    -20.0000
               -18.1582    -20.1801    -18.0000    -20.0000
               -16.1298    -20.1667    -16.0000    -20.0000
               -14.1048    -20.1543    -14.0000    -20.0000
               -12.0829    -20.1431    -12.0000    -20.0000
               -10.0640    -20.1333    -10.0000    -20.0000
                -8.0476    -20.1250     -8.0000    -20.0000
                -6.0334    -20.1185     -6.0000    -20.0000
                -4.0209    -20.1137     -4.0000    -20.0000

When I am done importing, I import the orientation details into the reference pane also.

For some reason the orientations give large errors on the reference pane. (See screenshot)

Why is this happening?

After I import cameras, I import an mesh and produce an orthomosaic with planer XY projection. With the current state of affairs I see large mismatches on the seamlines as photoscan has changed the exteriors somehow.

Thank you in advance for your help.

SAV

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Re: Import Cameras - Issues
« Reply #1 on: February 24, 2018, 09:19:31 AM »
Hi Andre240,

You don't need to import your camera orientations in order to generate an accurate model. Instead, only use camera LOCATIONS. When running the photo alignment, enable REFERENCE PRESELECTION.

Note that the large orientation errors you've encountered are probably due to a different 'orientation convention' that PhotoScan is using. It has been discussed in the forum in the past.

All the best.

Regards,
SAV