What are the open source options for object-based image analysis?

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Iago Costa Popular answer

Jorge,

Have you ever tried the OpenCV library?

https://docs.opencv.org/master/index.html

Best Wishes

Paulo Eduardo Cardoso

I'd recommend an overview of Orfeo Toolbox or SPRING (INPE) for OBIA/Segmentation.

A few resources and further readings

https://www.mdpi.com/2072-4292/11/10/1238/htm http://gis.geog.queensu.ca/PublicationPDFs/2019_PHOTO_SegmentationReview_OBIA_final.pdf

and link to the tools

https://www.orfeo-toolbox.org/

http://wiki.awf.forst.uni-goettingen.de/wiki/index.php/Object-based_classification_(Tutorial)

http://www.dpi.inpe.br/spring/english/

All the best

Iago Costa

Jorge Arigony-Neto

Dear Paulo Eduardo Cardoso , Iago Costa and Dan Abudu

Thank you very much for your inputs!

I appreciate that and will look carefully at your suggestions.

Anyway, I am still open to further recommendations, in case anyone else has other ideas...

Cheers!

Ayad M. Fadhil Al-Quraishi

Hi Jorge Arigony-Neto,

You could try SAGA GIS.

Good luck.

Joshua J Caster

This is not quite object-based, but you might be interested in Buscombe and Ritchie's deep learning approach Article Landscape Classification with Deep Neural Networks

The test datasets have focused on coastal environments, but we are testing them in alluvial and aeolian environments with some success. Buscombe has provided the python code to run this process along with some examples ( https://github.com/dbuscombe-usgs/dl_tools ). I'm not a programmer but I managed to get it to work...mostly. From experience, the system has a lot of potential, though I am hesitant to jump on the machine learning band wagon where I don't quite understand why areas are being classified. However, this does have the advantage of being able to deal with a lot of images.

For UAV data with topography, you might also be interested in our "process from form" approach Article Geomorphic Process from Topographic Form: Automating the Int...

We used arcpy, which is not open sourced but ESRI python code, however the concept could be applied to other GIS software. We designed it specifically for using imagery, repeat topography and topographic change patterns to inform about dominant geomorphic processes for use in a process specific sediment budgets. Our code and example data is provided as supplementary information to the paper and I have some code modifications for sub-meter data on my RG page.