Hi Nikos, Thank you for the reply.
some normalisation, before patching, is what "needs" to be done, I think. > Relative > normalisation here (either for images of different dates over the same > area, or neighbouring images of the same date). > Yes I also agree with that, I tried doing histogram matching before running r.patch, though I am not sure if it is right way. Any idea on how the change in values due to matching will affect further processing? > > I never finished implementing some very simple process as described in > user manual(s) for QuickBird2 imagery, if I remember well. > > I have a draft module which I named i.radio.balance. In short: the > major difference between two scenes of the same area is the solar > geometry. This difference can be minimized by correcting imagery for > Earth-sun distance and solar zenith angle. > I can send you off-list, if you want, the on-going script (incomplete, yet > well > documented I believe it to be). > > I would be happy to test your code and let you know the results. Let me know. Regards Sajid
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