[email protected] wrote: > > Hello guys, > > Now I am a beginner to use the OTB and I have some problems when using > the Cloud Detection Example. > > As far as I know that there are several techniques to detect cloud > from the remote sensing imagery. In the OTB, it detects the cloud > based on spectral angle principle and assume that the image have four > spectral bands. In my mind the parameter setting should affect the > detection result, and the parameters must set according to Sensor that > the camera adopted.But not every cameras have four spectral bands. > > So My questions are: > > Does there any papers about the OTB Cloud Detection method? > > Does it work well using only three spectral band? > > What is the basic principle to set the parameters? > > Anyone any suggestion is welcome! > > Thanks very much. > > --
Hi, You are right about the fact that there are many methods for the detection of clouds. The spectral method proposed in OTB is a very simple one (spectral angle and low-pass filtering before thresholding), but has the advantage of not needing any particular spectral band (SWIR or thermal, for instance). If you want more sophisticated approaches, you should try to implement something inspired from Fmask[1] for single-date acquisitions or from MACCS[2] for multi-temporal series. Jordi [1] Zhu, Zhe, and Curtis E. Woodcock. "Object-based cloud and cloud shadow detection in Landsat imagery." Remote Sensing of Environment 118 (2012): 83-94. [2] Hagolle, Olivier, et al. "A multi-temporal method for cloud detection, applied to FORMOSAT-2, VENµS, LANDSAT and SENTINEL-2 images." Remote Sensing of Environment 114.8 (2010): 1747-1755. -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
