Images are getting rotated

[abrahamezzeddine]

Describe the bug
When I do feature extraction, the images are rotated and flipped 90 degrees for some reason. I am not sure why this happens and I have tried to pick the selection "Upright" but it does not help it. This seems intermittent and I cannot really figure why it happens. I tried to look in the documentation but cannot find anything about this. There is EXIF information in the Iphone photos as well, so I would assume COLMAP uses those for the camera parameters?

Is it because I am taking the photos in a vertical manner instead of horizontal? If so, how do I still force it to use the vertical (original) photos?

To Reproduce
Regular Feature Extraction (standard settings)

Expected behavior
No rotation, I expect the images to be in the same orientation as the original picture.

Screenshots
If applicable, add screenshots to help explain your problem. Input images and/or output reconstructions are usually helpful.

Environment:
COLMAP 3.9.1

Thank you very much.

[Filocava99]

Same issue

[jaco001]

Yes exif stored info is taken to consideration.

Solution:
Use Lightroom or Darktable to fix orientation and more parameters like size/ratio/color before you put this to colmap.
Those tools store proper info at export.

Addition tip:
Do not mix vertical/horizontal exif info in your datadset, cus automatically colmap drop one of it, even if they have same size.

[Filocava99]

Yes exif stored info is taken to consideration.

Solution: Use Lightroom or Darktable to fix orientation and more parameters like size/ratio/color before you put this to colmap. Those tools store proper info at export.

Addition tip: Do not mix vertical/horizontal exif info in your datadset, cus automatically colmap drop one of it, even if they have same size.

Can't use any other tool, I have an automated pipeline, so if there's a specific exif field that's needed, I need to add it when the picture is taken, which I can easily do. But what I need to know is, of the many exif values, which are the ones used to calculate the image orientation?

[jaco001]

This https://jdhao.github.io/2019/07/31/image_rotation_exif_info/ and wiki helps https://en.wikipedia.org/wiki/Exif