Alignment of 300 drone images is not working

General Issues and Bug Reporting
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1

I’m using a DJI Mini 2 to capture a variety of images to create a model of buildings for a study for a new construction project. I have a 70% side overlap and 40% front overlap. I’m shooting in loops combined with vertical down.

If I use the option of Use Camera Priors for georeferencing, the point cloud and model ends up at some random weird angle.

If I turn off the option, all the cameras are under the mesh and the whole site appears upside down. It’s also no longer to a real scale and not in a coordinate system.

I’ve checked the EXIF data captured by the Mini 2 and it is in this format. Can Reality Capture read the GPS in this format?
GPSLong = 101deg 40’ 2.581"
GPSLongitudeRef = East
GPSLatitude = 3deg 10’ 56.192"
GPS LatitudeRef = North
GPS Altiude = 160.74 meter (527.23 feet)
GPS AltitudeRef = Above sea level
GPS VersionID = 02 03 00 00

What other setting do I need to correct or tweak to get my model in the correct orientation in WGS84?

After days reading forums and FAQ and having tried a number of different photo sets, I cannot work this one out.

Please let me know how to configure Reality Capture to align the Dji Mini 2 images more reliably.

Thanks

2

hi @BIMdroneKL
I think you are in the wrong forum.

3

Hi BIMdroneKL,
first of all, you are using insufficient overlap. It should be at least 75% in both directions.
Secondly, the precision of GPS for small drones is not so precise, so there could be issues with the position. As you have different results for Use camera priors settings the image’s position seems to be written into images and used for alignment. If you see a little pin sign next to your imported images, then they are georeferenced. You can also check their position in 1Ds view when you will click on a wanted image:
image
There could help using GCPs with known coordinates or you can try to set higher position accuracy in the Alignment settings for your images:
image

4

Hi, where should I post this ?

5

Well, maybe my forum display was borked, your message concerning RC was displayed in general unreal forums.
My bad, you can discard my previous message.

all the best :wink: