Help process data

[Umberto]

Hi i’ve a large dataset of image splitting in five zone each of all around 1400 image.
I’ve try to process all zone with standard configuration like forest, high resolution with very bad results.

I try custom configuration :

crop: 0, feature-quality: medium, matcher-neighbors: 20, min-num-features: 12000, resize-to: -1, sfm-algorithm: planar

The result is the same, orthophoto reconstruction cover only a part of survey area with orthophoto and 3D model anbd 3d model is very bad like in image 1.

I’m using Lightning Network
use GCP to georeferencing.
What i’m doing wrong?

[Saijin_Naib]

Welcome!

Could you please start with describing your dataset and your Processing Parameters?

For example:

1. Image Resolution (Megapixels)
2. Image Count (Number of Images)
3. Image Band Count/Type (BGR [3], BGRN [4], etc)
4. Flight Plan (Grid, Cross-grid, Corridor, Orbit, Free-Flight, etc)
5. Flight Plan Frontal Overlap and Sidelap
6. Flight Plan Ground Sample Distance (GSD)
7. Link to the Data
8. Processing Parameters from WebODM

[Umberto]

• Image Resolution (Megapixels) - 20
• Image Count (Number of Images) -1350
• Image Band Count/Type (BGR [3], BGRN [4], etc) - i don’t know, i’m newby
• Flight Plan (Grid, Cross-grid, Corridor, Orbit, Free-Flight, etc) - grid
• Flight Plan Frontal Overlap and Sidelap - 70% / 30%
• Flight Plan Ground Sample Distance (GSD) - 1.5
• Link to the Data - comimng soon
• Processing Parameters from WebODM - crop: 0, feature-quality: medium, matcher-neighbors: 20, min-num-features: 12000, resize-to: -1, sfm-algorithm: planar

[Saijin_Naib]

@Umberto

Flight Plan Frontal Overlap and Sidelap - 70% / 30%

This is far too low for agricultural fields and treestands. They aren’t feature-rich and varied enough. You’ll likely find better success with sidelap set to a minimum of 65%.

[Umberto]

Ok, thanks.

Iwill try new flight with new overlapping param

[smathermather]

Great! And if you can afford to, make that side-lap something closer to 70-72%. Saijin_Naib is correct: 65% is the bare minimum.

[Saijin_Naib]

Yep! And crank that frontal overlap! High as you can go! It only costs you storage and a bit extra processing time, and can sometimes greatly help issues where you’d otherwise need extra sidelap (which costs you airtime!).