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General / Axis issues from DJI P4 images
« on: October 12, 2020, 04:39:18 PM »
So I know this is not a new issue, and I've really tried digging into previous forums (e.g. https://www.agisoft.com/forum/index.php?topic=4986.msg38769#msg38769, https://www.agisoft.com/forum/index.php?topic=12475.msg55437#msg55437, https://www.agisoft.com/forum/index.php?topic=5739.msg27997#msg27997, ) but I can't seem to remedy my issue. Admittedly I'm very new to Metashape so I'm hoping the fix is obvious to someone a bit more experienced.
The following issue is one that I'm having, to varying degrees, with the 15+ models I'm trying to create (note: I'm not using GCPs). The axes as they manifest from the EXIF data are not correct or even realistic (screenshot 1).
My workflow is to:
1- Load images
2- Remove EXIF info
2.5- Apply masks
3- Align images to build sparse cloud
4- Select and delete "bad dots" then "optimize" --> Rinse and repeat until it looks good
5- Build dense cloud
6- Delete bad dots
7- Create mesh
8- Decimate mesh (to 1,000,000 faces to keep file size shareable, leave larger if only planning to use in Metashape)
9- Generate texture
10- Add back the EXIF data from images
11- "Clear" the cameras with large errors & rerun the location calibration <-- not sure how to do this one... might be my issue...?
This workflow was suggested to me by another user. I've attached a second image (screenshot 2) of what the model should roughly look like in its natural orientation, but you'll note the axes are mismatched in this image (Z should be Y, X should be Z and Y should be X). A secondary question, would be: is this workflow even appropriate/optimal for data without GCPs?
Finally, I've incorporated a picture of the first several rows of my reference pain for EXIF data (screenshot 3).
I've double checked the altitudes in the RAW EXIF from the images and they seem to be accurately represented in Metashape so don't think its the DJI altitude issue referenced here (https://agisoft.freshdesk.com/support/solutions/articles/31000152491-working-with-dji-photos-altitude-problem-. I've also played with changing the coordinate system in the reference settings to no avail.
Any help would be greatly appreciated.
System specs: (screenshot 4).
-Ethan
The following issue is one that I'm having, to varying degrees, with the 15+ models I'm trying to create (note: I'm not using GCPs). The axes as they manifest from the EXIF data are not correct or even realistic (screenshot 1).
My workflow is to:
1- Load images
2- Remove EXIF info
2.5- Apply masks
3- Align images to build sparse cloud
4- Select and delete "bad dots" then "optimize" --> Rinse and repeat until it looks good
5- Build dense cloud
6- Delete bad dots
7- Create mesh
8- Decimate mesh (to 1,000,000 faces to keep file size shareable, leave larger if only planning to use in Metashape)
9- Generate texture
10- Add back the EXIF data from images
11- "Clear" the cameras with large errors & rerun the location calibration <-- not sure how to do this one... might be my issue...?
This workflow was suggested to me by another user. I've attached a second image (screenshot 2) of what the model should roughly look like in its natural orientation, but you'll note the axes are mismatched in this image (Z should be Y, X should be Z and Y should be X). A secondary question, would be: is this workflow even appropriate/optimal for data without GCPs?
Finally, I've incorporated a picture of the first several rows of my reference pain for EXIF data (screenshot 3).
I've double checked the altitudes in the RAW EXIF from the images and they seem to be accurately represented in Metashape so don't think its the DJI altitude issue referenced here (https://agisoft.freshdesk.com/support/solutions/articles/31000152491-working-with-dji-photos-altitude-problem-. I've also played with changing the coordinate system in the reference settings to no avail.
Any help would be greatly appreciated.
System specs: (screenshot 4).
-Ethan
