1. First use with the Orfeo Toolbox
framework Monteverdi
Stéphane MAY
stephane.may@cnes.fr
orfeo-toolbox.org
1

2. Use case 1 : open an image, and discover the viewer
Menu File > Open
Im4_C_29042009_170_395/372076101/SPVIEW01/IMAGERY.TIF
Menu Visualization > Viewer
Select your input images
Discover the viewer functionalities
Alternative : right click on the module in the pipeline
orfeo-toolbox.org
2

3. Monteverdi – Viewer
Visualization
Viewer (1/5)
orfeo-toolbox.org
3

4. Monteverdi - Viewer
Visualization
Viewer (2/5)
orfeo-toolbox.org
4

5. Monteverdi - Viewer
Visualization
Viewer (3/5)
orfeo-toolbox.org
5

6. Monteverdi - Viewer
Visualization
Viewer (4/5)
orfeo-toolbox.org
6

7. Monteverdi - Viewer
Visualization
Viewer (5/5)
orfeo-toolbox.org
7

8. Use case 2 : create a pipeline, save an image
Menu File > Open
Im4_C_29042009_170_395/372076101/SPVIEW01/IMAGERY.TIF
Menu Visualization > Viewer (lock the pipeline !)
File > Extract ROI from dataset
Positions (x,y) = [3000,3000], sizeX=500 (w), sizeY=600 (h)
File > Save dataset
File > Save dataset (advanced)
Save only Channel 1 in Float type
Seel also :
Right click on pipeline module ExtractROI > Show module
Cache dataset
orfeo-toolbox.org
8

9. Monteverdi - ROI
File > Extract ROI
orfeo-toolbox.org
9

10. Monteverdi – Save dataset
File > Save dataset (advanced)
Choice of data type
Choice of output channels
orfeo-toolbox.org
10

11. Use case 3 : threshold an image
Menu File > Open
./theme2/extraitIm2_C/Im2_c_extrait.tif
Menu Filtering > Threshold
Generic Threshold / Threshold Above / Change Lower threshold
Generic Threshold / Threshold Below / Change Upper Threshold
➢ Role of outside value
➢ Role of alpha (alpha blending) : alpha=0
Generic Threshold / Threshold outside / Change upper & lower th.
Binary threshold / Lower & Upper threshold / Outside & Inside
values
orfeo-toolbox.org
11

12. Monteverdi - Threshold
Filtering
Threshold
orfeo-toolbox.org
12

13. Monteverdi – Feature extraction
Filtering
Feature Extraction (1/3)
orfeo-toolbox.org
13

14. Monteverdi – Feature extraction
Filtering
Feature Extraction (2/3)
orfeo-toolbox.org
14

15. Monteverdi – Feature extraction
Filtering
Feature Extraction (3/3)
➢ More than 65 features !
Mean, variance, Gradient, spectral angle
Textures (energy, entropy, contrast, etc)
Morphological filters
Radiometric indexes
• Vegetation (NDVI, ARVI, etc), Soil, Built up, Water
Edge density
Mean shift
Original data (=> no need to concatenate channels after filtering)
Etc
orfeo-toolbox.org
15

16. Use case 4 : Feature extraction (1/3)
Menu File > Open
./theme2/extraitIm2_C/Im2_c_extrait.tif
Menu Filtering > Feature extraction
Test the following features (See OTB-Software-Guide.pdf for technical
details on algorithms)
➢ Original data (=> no need to concatenate channels after filtering)
➢ Edge detection : Touzi
➢ Spectral angle : choose one vegetation pixel
➢ Variance
➢ Mean
➢ Rec. gradient
➢ Morphology > Morphology opening
➢ Edge density > Sobel
orfeo-toolbox.org
16

17. Use case 4 : Feature extraction (2/3)
Menu Filtering > Feature extraction
Test the following features (See OTB-Software-Guide.pdf for
technical details on algorithms) :
➢ Radiometric indexes
Vegetation
• NDVI, RVI, PVI, etc
Soil
• BI2
Built up
• ISU
Further work :
➢ Rename output image channels
➢ Save your result
➢ Build Mean, variance image on a Touzi image orfeo-toolbox.org
17

18. Use case 4 : Feature extraction (3/3)
Solution : mean, variance over Touzi image
Reader
Feature Extraction (Reader0) > Touzi
Feature Extraction (FeatureExtraction1) > Mean, Variance
Save your result
orfeo-toolbox.org
18

19. Use case 5 : concatenate your results
Menu File > Open
./theme2/extraitIm2_C/Im2_c_extrait.tif
Menu Filtering > Feature extraction > NDVI
Menu File > Concatenate Image
Add Reader0 → Channel 1
Add Reader0 → Channel 2
Add FeatureExtraction1 → OutputImage
View the result
orfeo-toolbox.org
19

20. Monteverdi – Concatenate images
File > Concatenate images
orfeo-toolbox.org
20

21. OTB – Concatenate images
Command line tool
otbConcatenateImages-cli -il image1.tif image2.tif -out img_concat.tif
orfeo-toolbox.org
21

22. Monteverdi
Thank you for your attention !
orfeo-toolbox.org
22