SARPROZ ©

you previously posted your question in a discussion on a different topic, so, it has been moved here.
the question you are asking has been discussed in many other posts.
here an example:
https://www.sarproz.com/groups/sarproz-group/forum/topic/slight-offset-after-orthorectification-s1/
please read carefully the forum and the documentation before…[Read more]

Hi,

a journal paper that described the core algorithms in Sarproz:

D. Perissin and T. and Wang, “Repeat-Pass SAR Interferometry with Partially Coherent Targets,” IEEE Transactions on Geoscience and Remote Sensing, vol. Volume 50, p. Pages 271–280, 2012.

a confe…[Read more]

you are right that a low number of images implies low robustness in the estimation of the coherence and a bias towards high values. That said, numbers are relative and dependent also on other factors. so, it is difficult to tell you what number to use without looking at your dataset and at your results in detail. play with the numbers and observe…[Read more]

Thanks, your help was very useful!

Okay! I understand much better.
And for the non linear weighning part, what would you recommend? I understand that the lower the number of images, the more coherence is required to trust the data, so m=0.8 would be a good value when it comes to few images, is that right?

Thanks!

Hi Paulina,
there are multiple things to consider in your case. An exhaustive answer to your question would require to discuss about various topics. You might want to take a Sarproz course to get more experience (in case, contact courses@sarproz.com). For the moment let me tell you that you should consider the APS estimation as an independent…[Read more]

APS is long wave length signal. So 0.7 seems fine spatial diatribution for aps. In sparse point protssing u may use lower ASI 0.6 for exaple

Hi Jaroslav,
at the moment, Sarproz saves the 25 reference points in a temporary variable. That variable can be accessed if you run Sarproz in Matlab using the pcodes version. You can access it if you type “fast” in the command prompt when Sarproz is running and the APS module is open and the function for automatic selection of reference points…[Read more]

the tif file is a 3 channels product. the inputs of the 3 channels (which you can pick up as you like) are all products that can be loaded in the scatter plot module. not as a color clearly (which has to be a scalar), but you indicated you wanted to threshold the MTCD product. so, in the boolean section of the scatter plot module you can implement…[Read more]

thanks for your reply.

The results of multi-temporal change detection is a tif file that cannot be loaded in the scatter plot module. we need to have a .mat file like the results of change detection module. Could you please let me know how to load it in the scatter plot module?

Thanks

Hi,
regarding your first question, the outputs of the multi-channel change detection module (shortly described here https://sarproz.com/manual/rgb_module.html) are common outputs that the radar community knows how to interpret. Usually, those outputs are evaluated visually. If you want to set thresholds, you have to build them yourself, e.g. via…[Read more]