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Author Topic: Forward and Backward Projection: Project global mask on scenes  (Read 359 times)

j.senn

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Forward and Backward Projection: Project global mask on scenes
« on: September 17, 2020, 04:12:43 PM »
Good Morning All,
We are working with aerial RGB, multispectral and thermal imagery of a river. The datasets were not synchronously captured and thus can not be used as bands. We would like to use backward and forward projection between image and world coordinates for two tasks:

-   Mask out water: This could either be done by a global mask projected from individual scenes or a global mask projected onto the individual scenes. Ideally this could be used between all sensors.
-   Create synthetic bands: An orthophoto created from imagery of sensor A could be used to create synthetic scenes as additional bands for sensor B. This would help us to run image classification on the single scene rather than the stack of orthophotos.

To our understanding all required parameters are known: Georeferenced orthophoto, sensor locations and directions, lens calibration and depth maps. However, we couldn’t find any information if this has been done before and if there are scripts to do so.
I would be very grateful for every helpful comment.
Johannes

j.senn

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Re: Forward and Backward Projection: Project global mask on scenes
« Reply #1 on: October 20, 2020, 04:10:45 PM »
Hi All,
I've found a solution for projecting mask from the model to my scenes in this post: https://www.agisoft.com/forum/index.php?topic=12640.msg56180#msg56180

I am still desperate to find a way of backward and forward projecting actual data. especially between sensors.

Please let me know if you have ideas.