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Author Topic: Photo rotation before or after alignment?  (Read 2649 times)

rossnixon

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Photo rotation before or after alignment?
« on: February 16, 2018, 07:53:14 AM »
I have many aerial photos. About half of them were taken at 180 degrees from the others.
The align photos process completed with everything aligned correctly.

But now I'm having trouble positioning my control points, so are having to rotate the photos inside Photoscan.
I think I will be able to get my errors down to acceptable levels. I haven't finished yet though.

Do I need to repeat the align photos process after this? I'm wondering if my tie point cloud is faulty and misleading, and will affect the final orthomosaic.

Alexey Pasumansky

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Re: Photo rotation before or after alignment?
« Reply #1 on: February 16, 2018, 08:19:03 PM »
Hello rossnixon,

Rotating images in PhotoScan (in Photo view or in Photos pane) is safe operation, it doesn't affect the source images and only applies the image rotation for the visualization purposes.

After placing the markers' projections you can load their coordinates to the Reference pane and use Optimize cameras option - it would improve the accuracy of the alignment results.
Best regards,
Alexey Pasumansky,
Agisoft LLC