Hi Manuel, thanks for the feebacks. Do you have any background info on how to set the pixel reference value as well as threshold and variance? Should I analyze the input data, looking for some cloudy areas and doing stats on there to get the reference pixel?
Best regards, Daniele Il giorno giovedì 23 ottobre 2014 10:03:25 UTC+2, Grizonnet Manuel ha scritto: > > pixel components parameters are a pixel value in the input image taken on > a cloud which is used as a reference for spectral angle computation. > > Manuel > > Le 23/10/2014 10:01, Daniele Romagnoli a écrit : > > Hi, > I have checked again the sample code and I was wrong about the pixel > Components meaning. > I have already checked the software guide. I will check it again using the > input sample data contained in the Example directory to see how it works. > > Thanks,. > Daniele > > > > Il giorno giovedì 23 ottobre 2014 09:52:45 UTC+2, Grizonnet Manuel ha > scritto: >> >> have a look to the example in the software guide. There is explanation >> of input parameters: >> >> >> http://www.orfeo-toolbox.org/SoftwareGuide/SoftwareGuidech14.html#x42-24200014.8 >> >> Note also that input data used in the example are publicly available in >> the OTB-Data repository (Example directory): >> >> http://hg.orfeo-toolbox.org/OTB-Data/file/tip/Examples >> >> Regards, >> >> >> Le 22/10/2014 17:06, Daniele Romagnoli a écrit : >> >> Hi all, >> I was able to compile and install the OTB, using the configuration which >> also builds examples, tests and applications. >> I'm trying to use the CloudDetectionExample but it's not clear to me how >> to use it. >> It takes 11 params. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> *inputFileName outputFileName printableInputFileName >> printableOutputFileName firstPixelComponent secondPixelComponent >> thirdPixelComponent fourthPixelComponent variance minThreshold maxThreshold >> * >> I assume the first four of them are input/output files and names. >> Then the other four are reference pixels. >> Finally there is variance and min and max thresholds. >> I have a couple of questions about these params. >> What should I provide? >> About Nth-PIxelComponent I assume I should provide an image representing >> a cloud. Is it right? If affirmative, how big should be that image? a >> simple cloud? an area with several clouds? An area with different shapes >> of clouds? Really not sure about what should I provide. (What about data >> type. Could I provide Byte images?) >> Supposing I'm working with Gray images, I think I can modify the example >> and rebuild it OR setup (using GDAL) an RGBA image on top of the gray one. >> In any case, the number of the components pixels params should be the same >> of the number of bands of the input image; right? >> >> What about variance and thresholds values? >> >> Please, let me know. >> Best Regards, >> Daniele >> >> On Wednesday, October 15, 2014 9:32:03 AM UTC+2, Andrea Aime wrote: >>> >>> Hi, >>> I've just installed otb-bin on a Ubuntu machine, hoping to run cloud >>> detection >>> against some satellite imagery. >>> Unfortunately I don't see the algorithm being exposed among the cli >>> applications... am I overlooking something? >>> >>> Cheers >>> Andrea >>> >> -- >> -- >> 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. >> >> >> -- >> Manuel GRIZONNET >> CNES - DCT/SI/AP - BPI 1219 >> 18, avenue Edouard Belin >> 31401 Toulouse Cedex 09 - France >> Tel: +33 561 282 630 - Fax: +33 561 283 109 >> >> >> -- > -- > 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] > <javascript:> > To unsubscribe from this group, send email to > [email protected] <javascript:> > 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] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- > Manuel GRIZONNET > CNES - DCT/SI/AP - BPI 1219 > 18, avenue Edouard Belin > 31401 Toulouse Cedex 09 - France > Tel: +33 561 282 630 - Fax: +33 561 283 109 > > > -- -- 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.
