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Author Topic: importing E57 scans. I'm lost  (Read 2647 times)

JMR

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importing E57 scans. I'm lost
« on: September 24, 2024, 04:04:41 PM »
Hi, Agisofties
Why some e57 exported from a terrestria laser scanner turns into an equirectangular depth panorama and sometimes as a set of cube faces, and sometimes there is no image version at all. Is there a way to choose how Metashape reads a scan, and more importantly, is there any reason to consider one format result comes with any particular benefit or is better suited for any workflow.
The following image shows the result of importing three E57 scans, and ech behaves differently even if I use same settings at import dialog.

Best regards

JMR



Alexey Pasumansky

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Re: importing E57 scans. I'm lost
« Reply #1 on: September 25, 2024, 05:35:53 PM »
Hello José,

The behavior depends on the source data. Laser scans in E57 format may contain embed images: either equirectangular panoramas or six square images (representing panorama as a cube). In case embed images are missing, Metashape will create equirectangular panorama attached to the laser scan based on the colors of the point cloud stored in the file (providing that it is a structured laser scan).

In your examples, how Scan01 was created? Looks like it has the same number of points as Scan02, but maybe it is no longer a structured scan?
Best regards,
Alexey Pasumansky,
Agisoft LLC