undesired objects on orthophoto

[AdrienB]

Hello people

I'm trying to generate an orthophoto of a wall with a scaffolding front of it.
I'm trying to make it disappear to just have the wall.
I've pictures of the wall behind the scaffolding.
My problem is : even if i make it disapear, some pieces of it stay like a ghost ( low opacity but viewable ) on the orthophoto.
The dense point cloud was made in high quality and dept, the model too. I don't see the scaf'  on the pointclound and on the low quality texture model.

is there any tricks ?

I've something like 700 pictures, it'll takes me a century to hide, manually the object.

I tried to do the orthophoto of the back of the wall but, even if the result is better, there are always some problems.

Thank a lot

[Kiesel]

Hello AdrianB,

masking out the scafffolding should normally help here. You don't have to do it by hand. When you have the model allready:
- mark all or one wanted photos to be masked
- right click
- import mask
- choose Method "From model"
- choose Apply to "Selected" or "All"

Make sure you use version 1.4 because there was an issue in version 1.3.4.

In version 1.4 there is a also a new improved masking solution "strict masking", see pinned post at top in forum, have to test this myself.

Hope it helps you

Karsten

[AdrienB]

Hi Karsten,

Thank you for your solution, I found something who make me improve my orthophoto

My wall is pretty plain and straight, it must work with a simple shape like this. So : 

- I do all the steps in low quality ( aligning, dense cloud, object ) and the points and tie points too ( half than a normal process )
- I flip my model to see the back of it ( its a surface, so the back is just a mirror without objects front of it ) to process the orthophoto

The quantity of undesired objects is low, but there is still few fantomatic textures,

- I found the problematics pictures and hide the undesired parts with masks.

Its ok !

Long but working.

If in my orthophoto process, i can choose " middle " method instead of mosaic ( not sure of the terms ) but the general quality is very poor.

Good day !

[Alexey Pasumansky]

Hello AdrienB,

Can you provide some screenshots demonstrating your project and the issue?

Practically, you can modify the region size (the bounding box), so that it only contains the surface of interest and no elements in front of it - it should allow for the orthomosaic generation process to ignore the unwanted objects in front of it.

[Kiesel]

Alexey your method should be much simpler, as allways. 

Alexey does there also exist a method to make a "polygonal bounding box" for geometry not as straight as a wall?

Regards

Karsten

[Alexey Pasumansky]

Hello Karsten,

At the moment it's not possible to modify the shape of the box by other means, except the Resize Region option.

[Kiesel]

Thank you for answering, Alexey!