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Messages - mitchgalea

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General / Cylindrical Orthomosaic Generation for long think wall scan
« on: January 24, 2022, 02:16:27 PM »

We have been capturing some datasets of a port quay wall underwater. The datasets are single strips going across approximately 60m in length. Due to the high distortion of our lens and the data being captured underwater the resulting models expresses the 'bowl effect'. This is not too much of an issue as we are not interested in a model but of an orthomosaic. We tried generating a planar orthomosaic but it resulted in the edges being quite dark due to the curve of the model. I have been experimenting with the cylindrical orthomosaic generation process and have read through the following article
This was quite helpful to give background but I haven't been able to get it to work. I've been trying to use the marker method. To do this I have added IMU readings to align the model, then used a circle fitting algorithm with the data to get the center of the cylinder so that I can generate an axis. When creating markers and giving them the center axis coordinates and trying to generate the orthomosaic i get the follwing error 'location of marker is undefined'.

I have attached an image of the model curve, the mesh and planar orthomosaic.

What would be the best method to generate an orthomosaic of this model?

Thanks in advance

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