Guillaume, On Mon, Mar 20, 2017 at 10:23 AM, Guillaume Pasero <[email protected]> wrote: > > Hi, > > Would this polynomial transformation be : > > a new type of sensor model (to be used during ortho-rectification) ? > or an arbitrary transform that can be applied to any image (such as the rigid > transforms) ?
I guess the second. Examples: http://geog.uoregon.edu/amarcus/geog418/Labs/Lab06_rectification.htm The polynomial can be fit and applied using gdal_translate to incorporate the GCPs and then gdalwarp r near order 2 to apply the transformation but the way of introducing the GCPs is kind of inconvenient. > The polynomial model is a particular case of rational model, maybe setting > the denominator coefficients to [1,0,0,...,0] will do the trick. > > Guillaume Yes, I agree. But can this be done in practice? Also, is there a tool in OTB to actually fit such a rational polynomial with prescribed denominators? Anyway, please consider also my suggestion of including the method described in Pala, V., and X. Pons. 1995. “Incorporation of Relief in Polynomial-Based Geometric Correction.” Photogrametrics Engineering & Remote Sensing 61: 935–44. https://www.researchgate.net/publication/244485309_Incorporation_of_relief_polynomial-based_geometric_corrections Agus > > > On 03/17/2017 04:56 PM, Agustin Lobo wrote: > > Is it possible to fit and apply a simple polynomial (not rational) for > geometry correction with OTB? > > Is it possible to apply such a polynomial using x,y,z coordinates as > suggested in > Pala, V., and X. Pons. 1995. “Incorporation of Relief in > Polynomial-Based Geometric Correction.” Photogrametrics Engineering & > Remote Sensing 61: 935–44. > https://www.researchgate.net/publication/244485309_Incorporation_of_relief_polynomial-based_geometric_corrections > ? > > The later is a simple approach that works well with relatively coarse > imagery (i.e. 10-30 m resolution). > > > Agus > > > -- > Guillaume PASERO > Responsable technique > Business Unit ESPACE & GeoInformation - Département Payload Data & > Applications > > CS Systèmes d'Information > Parc de la Grande Plaine - 5, Rue Brindejonc des Moulinais - BP 15872 > 31506 Toulouse Cedex 05 - FRANCE > +33 561 17 64 21 - [email protected] > > -- > -- > 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. -- -- 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.
