Tutorial on the OTB/Monteverdi application - part 2

1. Use cases with the Orfeo Toolbox
framework Monteverdi
orfeo-toolbox.org
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2. Use case 12 : Superimpose two images with homologous
points
Menu File > Open
./theme2/IM2/Extraits/Im2_p_extrait.tif
Menu File > Open
./theme2/IM2/Extraits/Im2_c_extrait.tif
Menu Geometry > Homologous points extraction
Fix image : PAN
Moving image : XS
Select homologous points in the bottom windows
➢ Add / Evaluate / Guess
=> Output : XS image at the same size and resolution than the
panchromatic one. Images fusion is now possible.
orfeo-toolbox.org
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3. Monteverdi – Homologous points extraction
Menu Geometry > Homologous points extraction
orfeo-toolbox.org
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4. Use Case 13 : pan-sharpen a multispectral image (image
fusion)
Filtering
Pan-sharpen an image
➢ Requires Panchromatic and Multispectral input images at the same
resolution
Menu Filtering > Pan-sharpen an image
➢ Enter PAN and XS image well registered
Ortho-images of PAN + ortho-image of XS
Ortho-image PAN + superimpose of XS
XS resampled on PAN image with Homologous points
orfeo-toolbox.org
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5. Pan-sharpen an image (image fusion)
Filtering
Menu Filtering > Pan-sharpen an image
orfeo-toolbox.org
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6. Use case 14 : compare results, perform simple math
computation
Menu Filtering > Band math
Addition, Substraction, Multiplication, Ratio, Shift-Scale (A*X+B)
orfeo-toolbox.org
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7. Monteverdi – GCP to sensor model
Menu Geometry > GCP to sensor model
orfeo-toolbox.org
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8. Monteverdi – Reproject image
Menu Geometry > Reproject image
Reproject the image (existence of geometric model) into another
ground reference (UTM, LAMBERT, TRANSMERCATOR)
orfeo-toolbox.org
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9. Use case 15 : Change detection – application to floodings
Menu File > Open
./data_otb/SpotBefore.png
Menu File > Open
./data_otb/SpotAfter.png
Menu Filtering > Change detection
Select changed ROI polygons
Select unchanged ROI polygons
Learn
Display results
orfeo-toolbox.org
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10. Monteverdi
Filtering
Change
Detection
orfeo-toolbox.org
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11. Use case 15.1 : Change detection – application with radar
Menu File > Open
./data_otb/GommaAvant.png
Menu File > Open
./data_otb/GommaApres.png
Menu Filtering > Change detection
Select changed ROI polygons
Select unchanged ROI polygons
Learn
Display results
orfeo-toolbox.org
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12. Monteverdi
Menu SAR
Despeckle image : apply Frost / Lee filter
Compute intensity and log-intensity
orfeo-toolbox.org
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13. Monteverdi
Menu SAR > Despeckle image
orfeo-toolbox.org
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14. Monteverdi
Menu SAR > Compute intensity and log-intensity
orfeo-toolbox.org
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15. Use case 15.2 : Change detection – application with filtered
radar image
Menu File > Open
./data_otb/GommaAvant.png
Menu File > Open
./data_otb/GommaApres.png
Menu SAR > Despeckle image (GommaAvant)
Lee Filter
Radius : 10
Menu SAR > Despeckle image (GommaApres)
Lee Filter
Radius : 10
Menu Filtering > Change detection
Select changed ROI polygons, unchanged ROI polygons
Learn, Display results
orfeo-toolbox.org
Menu Filtering > Band-math (compare the results) 15

16. Use case 15.3 : Change detection – application with radar
(floodings)
Menu File > Open
./data_otb/ERSBefore.png
Menu File > Open
./data_otb/ERSAfter.png
Menu Filtering > Change detection
Select changed ROI polygons
Select unchanged ROI polygons
Learn, Display results
orfeo-toolbox.org
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17. Use case 15.4 : Change detection – application with radar
(floodings)
Menu File > Open
./data_otb/ERSBefore.png
Menu File > Open
./data_otb/ERSAfter.png
Menu SAR > Despeckle image (ERSBefore)
Lee Filter
Radius : 10
Menu SAR > Despeckle image (ERSAfter)
Lee Filter
Radius : 10
Menu Filtering > Change detection
Select changed ROI polygons, unchanged ROI polygons
Learn, Display results
orfeo-toolbox.org
Menu Filtering > Band-math (compare the results) 17

18. Use case 16 : Change detection applied to vegetation
Menu File > Open
./data_tp/theme1/IM2/Extraits/Ext_IM2_22031986_20mC.tif
Menu File > Open
./data_tp/theme1/IM2/Extraits/Ext_IM2_04102008_10mC.tif
...
Menu Filtering > Change detection
Select changed ROI polygons, unchanged ROI polygons
Learn, Display results
orfeo-toolbox.org
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19. Use case 16 : Change detection applied to vegetation
Menu File > Open
./data_tp/theme1/IM2/Extraits/Ext_IM2_22031986_20mC.tif
Menu File > Open
./data_tp/theme1/IM2/Extraits/Ext_IM2_04102008_10mC.tif
Menu Geometry > Homologous points
Resample 20m image on 10m image
Menu Filtering > Change detection
Select changed ROI polygons, unchanged ROI polygons
Learn, Display results
Further work :
Use also Ext_IM2_26032004_10mC.tif and Ext_IM2_17042000_20mC.tif
Compare results with Band-Math
orfeo-toolbox.org
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20. Monteverdi
Future evolutions
Integration of new OTB modules
Delete pipeline module functionality
Load / Save project functions
Change input images option into the pipeline
+ Future needs of the Monteverdi users !
orfeo-toolbox.org
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21. Monteverdi
Thank you for your attention !
orfeo-toolbox.org
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