Get results over water similar to pix4dreact

[eman]

Hi,

I am looking at creating orthomosaics for seagrass in the ocean, which I know is difficult for computers to do due to water movement. WebODM has not been very successful, with only small areas, if anything at all being stitched. However I recently trialed pix4dreact (interestingly pix4d cloud failed too), and the results over water were stitched perfectly, lining up very close to satellite imagery, and the resulting output is still 2cm/pixel. It seems it uses the gps data to do the stitching initially? Is there a way to get ODM to a similar thing? Are there any specific settings I should be changing, or is the algorithm just not designed this way? cm accuracy is not important for this. Here are the outputs from both:

thanks

[pierotofy]

Pix4Dreact works differently than ODM to stitch images. We don’t have similar functionality (for now at least). Have you tried using a program such as ICE https://www.microsoft.com/en-us/research/product/computational-photography-applications/image-composite-editor/ ?

[eman]

I thought that might be the case. Thanks anyway.

[kikislater]

@pierotofy

We don’t have similar functionality (for now at least).

There is Colmap present in NodeCM which is more similar. I got great results over water with MicMac

[smathermather]

As per Sylvain, you can try the following alternative nodes https://github.com/OpenDroneMap/NodeMICMAC and https://github.com/uav4geo/NodeCM.

[smathermather]

In my testing with NodeCM, it doesn’t work with WebODM, but will run on it’s own via command line. I’ll be opening an issue.

Edit. Issue here: https://github.com/uav4geo/NodeCM/issues/3

[eman]

I’ve tried nodemicmac, but it fails with an error on my dataset, although works with the demo dataset. I’ll give NodeCM a go though.

Thanks