Is it sensible to use multi-temporal speckle filtering when analysing temporal changes in flood extent, which will be seasonal? Would it be best for me to speckle filter each image individually before coregistering/stacking the images?
Stack/coriregister first and then speckle filter individually. Multitemporal filtering is not recommended.
3 Likes
Thanks for your answer @mengdahl , I’ll do that. Why is it important to stack/coregister the images first when applying the speckle filter to each image individually?
That depends on the coregistration-method. If it’s based on image cross-correlations speckle filtering in effect low-pass filters the images so cross-correlation is more likely to fail.
1 Like
Thanks, that makes sense.