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GeoscienceAustralia / PyRate

A Python tool for estimating velocity and time-series from Interferometric Synthetic Aperture Radar (InSAR) data.
https://geoscienceaustralia.github.io/PyRate/
Apache License 2.0
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Enhancement: Introduce Change Detection in Bi-temporal Polarimetric SAR Images #277

Closed jjerphan closed 4 years ago

jjerphan commented 4 years ago

Is your feature request related to a problem? Please describe. It is not related to a problem in the PyRate but a proposal.

@h-sdl and I have implemented a small pipeline for change detection for polarimetric SAR images in python from [1].

In short, we can detect changes between two SAR and subclasses changes in the two images:

Example 1 Example 2

Describe the solution you'd like The best would be to known whether such a feature would be interesting to include in PyRate.

Describe alternatives you've considered We do not know this library that much and thus this needs discussions. 😊

Additional context See our repository of the implementation: https://gitlab.com/jjerphan/rsd-project

See this original proposal of the method: [1] Advanced Methods for Change Detection in Multi-polarization and Very-High Resolution Multitemporal SAR Images. Davide Pirrone. PhD thesis, International Doctorate School in Information and Communication Technologies - University of Trento, 1 2019.

See the slides of the presentation of this method we made (in French): https://cloud.mines-paristech.fr/index.php/s/aXhZ2o5BM8fIBR0

mcgarth commented 4 years ago

Hi @jjerphan and thanks a lot for your proposal! We've had a look at your repository and algorithm and unfortunately do not think it is a good fit to PyRate. The aim of PyRate is to deduce the displacement time series from a stack of SAR phase interferograms. We use interferometric coherence as a secondary input but we are not using SAR backscatter intensity at all at the moment and we do not consider the different polarimetric channels (it is assumed all input interferograms have the same polarisation).

I think the PyRAT library might be a better fit for your contribution, see https://github.com/birgander2/PyRAT

Thanks again for getting in touch!

jjerphan commented 4 years ago

Hi @mcgarth !

Thank you for this comprehensive answer! We just have proposed this contribution to PyRAT, as you suggested, here: https://github.com/birgander2/PyRAT/issues/25