Gaps and holes in 3D model

RE: Gaps and holes in 3D model

Oto — Tue, 28 Dec 2021 13:16:43 GMT

Also fly around so it is not only closeup photos.

And take more photos around corners, you have no photos there. Read acquisition guide.

RE: Gaps and holes in 3D model

Zo Mi — Tue, 28 Dec 2021 12:20:30 GMT

Hi Oto,

Unfortunately using the legacy settings did not help.
Most likely I will do mapping once again and take care of the illumination and exposure.

Thanks anyway!

RE: Gaps and holes in 3D model

Oto — Sat, 25 Dec 2021 11:29:13 GMT

Try to use preset "legacy engine". Use load button and find it here C:\Program Files\Bentley\ContextCapture\data\Presets\AT\

RE: Gaps and holes in 3D model

Zo Mi — Tue, 21 Dec 2021 20:11:03 GMT

Hi Oto,

I am running CC update 19 - v10.19.0.122 version I believe that is the latest one. What exactly do you mean by legacy engine AT settings?

What I tried in the meantime is to change the exposure of the images using Photoshop which CC failed to use for reconstruction.

Example

However, the outcome is the same, AT didn't manage to use half of the images for the reconstruction.

Any idea what can be done here except go in the field and do once again mapping with different illumination settings?

Best,
Zoran

RE: Gaps and holes in 3D model

Oto — Tue, 21 Dec 2021 15:53:48 GMT

More looks like you have model inside model. It has not aligned all photos properly. Try to run with legacy engine aerotriangulation setting. What version of CC you are using?

RE: Gaps and holes in 3D model

Zo Mi — Mon, 20 Dec 2021 12:51:38 GMT

Hi Oto,

Thx for your inputs. According to the quality report, half of the images were calibrated, and half not, here comes the report.
communities.bentley.com/.../Block_5F00_1-_2D00_-AT-_2D00_-Quality-Report.pdf

The images are clear no blurry ones at all. Example:

Is there a way how to improve the results? Changing the camera settings (ISO, aperture, shutter) and refly the two sides again? Unfortunately using a laser scanner here is not an option as I can only rely on my P4ProV2.

Ps Your demo project looks really cool :)

Best,
Zoran

RE: Gaps and holes in 3D model

Oto — Mon, 20 Dec 2021 12:23:03 GMT

Your pictures are overexposed on one side. Also white walls have not enough details to generate tie points on them even if it were cloudy.

Have many photos are lost after aerotriangulation? Results seem very poor considering how many photos you have acquired. All photos are well focused no blur?

We had similar issue here were also tower had holes in the corners in the walls. It was greatly improved by adding laser scan data for church which was done by students. Alternative to using scanner would be to use mesh constraints or do retouch.

This scene was demo that it is possible to merge scanning, UAV photos and ground photos in one multiresolution mesh scene. You can even go inside exhibition hall and see the artwork.

http://realitymodels.northeurope.cloudapp.azure.com/rm/Burtnieku_baznica_kopskats_3mx/App/index.html?scene=Burtnieku_baznica_kopskats_3mx