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Orfeo Toolbox Geometric pre-processing

Orfeo Toolbox Geometric pre-processing

Stéphane MAY

stephane.may@cnes.fr

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Goal

Orthorectify images

➢Transform images from satellite referential to terrestrial referential

Cartographic or geographic projection

➢Use of the geometrical model

Impact of the geometrical model precision

Superpose images

➢Superpose images for pan-sharpening, change detection

OTB orthorectification works for :

➢Spot 5, Ikonos, Quickbird, GeoEye, WorldView

Geometric correctionsGeometric corrections

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Menu Geometry > Reproject Image (1/2)

Geometric correctionsGeometric corrections

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Menu Geometry > Reproject Image (2/2)

Geometric correctionsGeometric corrections

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Menu File > Open

./img_kalideos_reunion/2003-05-04/j_1a/1.0/IMAGERY.TIF

Menu Geometry > Reproject image

UTM / Linear

User defined Parameters :

➢Longitude : 55.612 Latitude : -21.290

Spacing X : 10, Spacing Y : -10 (m)

Size X : 520, Size Y : 500

File > Save dataset

Use case 1 : Orthorectify an image without DEMUse case 1 : Orthorectify an image without DEM

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Use case 1 : Orthorectify an image without DEMUse case 1 : Orthorectify an image without DEM

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Menu File > Open

./img_kalideos_reunion/2003-05-04/j_1a/1.0/IMAGERY.TIF

Menu Geometry > Reproject image

UTM / Linear

User defined Parameters :

➢Longitude : 55.612 Latitude : -21.290

Spacing X : 10, Spacing Y : -10 (m)

Size X : 520, Size Y : 500

DEM : enter the directory where .hgt files are

File > Save dataset

Visualization > Viewer > Add 2 images and compare

Use case 2 : Orthorectify an image with DEMUse case 2 : Orthorectify an image with DEM

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Use the command line tools

gdalinfo image.tif

otbObtainUTMZoneFromGeoPoint -lat -21.290 -lon 55.612

otbOrthoRectification-cli -in ./img_kalideos_reunion/2003-05-

04/j_1a/1.0/IMAGERY.TIF -out output.tif -ul 978771 7638749 -rpc 10 -size

500 520 -spacing 10 -10 -mapProj UTM 39 S -interp LINEAR

otbConvertGeoToCartoPoint -lat -21.290 -lon 55.612 -mapProj UTM 39 S

otbConvertCartoToGeoPoint -x 978771 -y 7638749 -mapProj UTM 39 S

Use case 2b : Orthorectify an image Use case 2b : Orthorectify an image

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Menu Geometry > Superimpose two images

Combination of geometrical models of the two images (note : works

only with images with geometrical model)

➢ Image to be superimposed : use of the direct geometrical model to

build Longitude/Latitude projection

➢Combination with the inverse model of the reference image.

➢Reprojection

Monteverdi – Superimpose two imagesMonteverdi – Superimpose two images

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Menu Geometry > Superimpose two images

Monteverdi – Superimpose two imagesMonteverdi – Superimpose two images

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Use case 3 : Superimpose an image Use case 3 : Superimpose an image

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Use the command line tool

otbSuperimpose-cli -inR img_geom1.tif -inM

../data_formation/img_kalideos_reunion/2004-08-

19/j_1a/1.0/IMAGERY.TIF -out output2.tif

Use case 3b : Superimpose an image Use case 3b : Superimpose an image

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Menu Geometry > Homologous points extraction

Monteverdi – Manual registrationMonteverdi – Manual registration

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Menu File > Open

Last 2 ortho images

Menu Geometry > Homologous points extraction

Select homologous points

File > Save dataset

Visualization > Viewer > Add 2 images (2003 and 2004 registered) and compare

Use case 4 : Manual registrationUse case 4 : Manual registration

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Use command line tools

otbRigidTransformResample-cli -in output2.tif -out output2_tr.tif -tx 150

-ty -90

otbFineRegistration-cli -ref output.tif -sec output2.tif -w output2.tif -out

disparity.tif -wo output2_reg.tif -er 10 10 -mr 9 9 -co 150 -90 -m CC

-spa 0.5 -ssr 10 10

Orfeo Toolbox - RegistrationOrfeo Toolbox - Registration

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Menu Geometry > GCP to sensor model

Monteverdi – Build a simple sensor modelMonteverdi – Build a simple sensor model

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Menu File > Open

./img_kalideos_reunion/2003-05-04/thr_1a/1.0/IMAGERY.TIF

./img_kalideos_reunion/2003-05-04/j_1a/1.0/IMAGERY.TIF

Menu Geometry

Orthorectification of PAN image over a selected ROI (Region of Interest)

Menu Geometry > Superimpose 2 images

Image to reproject : Reader1 (XS)

Reference image : Projection>OutputImage

Option : DEM : enter the directory where .hgt files are

Filtering > Pan-sharpening > Simple RSC pan sharpening

File > Save dataset

Filtering > Pan-sharpening > Bayesian fusion

File > Save dataset

Visualization > Viewer > Add 2 images (2 fusions) and compare

Use case 5 : P+XS fusionUse case 5 : P+XS fusion

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Thank you for your attention !

Monteverdi Monteverdi