problem restitution of facades

RE: problem restitution of facades

Damien Bregler — Tue, 03 Nov 2020 15:40:46 GMT

RE: problem restitution of facades

Cyril NOVEL — Tue, 03 Nov 2020 14:11:40 GMT

Hello Damien,

I could speak French, but in the interest of future visites by english speaking users, I'll stick to english

We have two possible solutions:

Use the Alternate Engine preset (in the AT settings: ). Try this one first. AT will be slower but the result may be better.
Enter Manual User Tie Points. This is a slow manual process. Go to the Surveys tab of your block, and create multiple User Tie Points linking ground imagery and drone imagery. I recommend at least 3 ground images and 3 drone images per tie points for this to work well.

I understand the second solution is not a perfect one, but should be a workaround. I'll ask the dev team if they have other ideas.

- Cyril

RE: problem restitution of facades

Oto — Tue, 03 Nov 2020 13:44:02 GMT

It has holes on roof and one wall has doubled.

Try setting point density high in aerotriangulation and also maybe try "alternate engine" in presets.

RE: problem restitution of facades

Damien Bregler — Tue, 03 Nov 2020 13:41:00 GMT

Hello Cyril,

if it's OK you can write in French, otherwise it's not OK.

Concretely I use 2 groups of photos: aerial photos and photos of facades.

At this stage I simply use the metadata of the photos and the automatic recognition of Tie Points.

The TA goes to the end of its process, but it discredits me either the aerial images (orange dots on the 3D rendering) or the images taken on facades.

Moreover, when only the images of the facades are taken into account, in the 3D visualization of the TA, we see the south facade disproportionate compared to the north facade.

These same shots were used by a competitor with a rendering computed by PHOTOSCAN, and everything seems to work well.

Unfortunately, I erased the improper files, I will restart an AT and send you a screenshot.

If you have an idea about the cause of this result, I would be delighted!!

Thanks

RE: problem restitution of facades

Cyril NOVEL — Tue, 03 Nov 2020 11:20:12 GMT

Hello Damien,

What kind of issues are you facing? Is the AT failing, or is the result of the AT not correct? Can you provide a screen capture highlighting the issue? Looking at your sketchfab model, I'm not sure I understand where the issue is.

- Cyril