RE: Photos not calibrated

Elena Petrova — Mon, 26 Apr 2021 14:11:13 GMT

Thank you, Felix!

RE: Photos not calibrated

Felix James — Fri, 23 Apr 2021 15:58:39 GMT

Hi Elena,

A definition of ContextCaptures AT Definition Settings Presets:

Alternate engine: This was a brand-new engine introduced in Update16, which is more robust but slower and less scalable

Simple incremental engine: all calibrated photos and tiepoints will remain unchanged but some orphan photos might be added to the main component.

Complete incremental engine: This is a kind of “normal” AT but instead of computing poses from scratch, it starts from the current solution. It might add some orphan photos, merge some disconnected components and everything will be adjusted, including previously calibrated photos and tiepoints.

Do not check rigid registration reliability: On very small acquisitions, smaller than the expected GPS accuracy, the engine may not georeference the scene. This option should force it to georeference the result in almost all cases with position metadata

Do not use pose metadata for SfM: when computing the poses (position/rotation policies to compute) the engine may leverage the pose metadata if any to check for proper computation. If, for some reason, the pose metadata (more likely the rotations) are wrong (not properly imported for example) it can break the AT. In such cases, you can either clear the rotation metadata or use this preset to solve the issue.

Keep all components for adjustment: If you set the poses policy to “keep” or “adjust within tolerance” this preset allows you to keep all the photos, even if they actually are several components that are not connected through tiepoints. A typical case is two sides of a river.

RE: Photos not calibrated

Elena Petrova — Thu, 15 Apr 2021 07:01:47 GMT

Hi Felix,

Could you explain what exactly action CC performs when we use each of U17 presets?
Alternate engine

Complete incremental engine

Do not check rigid registration reliability

Do not use pose metadata for SfM

Keep all components for adjustment

Simple incremental engine

Thank you!

RE: Photos not calibrated

Oto — Tue, 13 Apr 2021 19:39:22 GMT

This preset is in U17?

RE: Photos not calibrated

Felix James — Mon, 12 Apr 2021 09:27:11 GMT

Hi Joseph,

Please try running the Aerotriangulation using the preset "Do not use pose metadata for SfM". This can be found in the following location:

C:\Program Files\Bentley\ContextCapture\data\Presets\AT