Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash)
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This document discusses using the open-source software OTB Applications and Monteverdi to teach remote sensing techniques to students. It provides an overview of the curriculum, which includes radiometric analysis, NDVI calculation, supervised classification, and case studies. Sample code demonstrates how to perform change detection, classify images from different dates, and construct and analyze a time series of images. The software configuration and tools in Monteverdi and OTB Applications for visualization, processing, and classification are also outlined.
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Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash)
- 1. Introduction Use of OTB & Monteverdi Sample cases Comments Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) Mathieu Fauvel Since 2014 Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash)
- 2. Introduction Use of OTB & Monteverdi Sample cases Comments Outline Introduction Use of OTB & Monteverdi Sample cases Comments Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash)
- 3. Introduction Use of OTB & Monteverdi Sample cases Comments Introduction Use of OTB & Monteverdi Sample cases Comments Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 3 of 23
- 4. Introduction Use of OTB & Monteverdi Sample cases Comments Context ENSAT: Graduate School of Life Sciences of Toulouse Ministry of Higher Education and Research National Polytechnic Institute of Toulouse 3 years program (after 2 years post-bac) Year 1 2 3 Program Basics Image analysis and classification Case study Session Only Lectures Lectures and labworks Project Students ~150 ~70 ~25 Background Life science (biology, agronomy, entomology . . . ) Applied Statistics with R Knowledge in programming (Python) Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 4 of 23
- 5. Introduction Use of OTB & Monteverdi Sample cases Comments Objectives How to use remote sensing data for agricultural and environmental sciences? Overview of main applications Basics of physics Basics of image processing and applied statistics for processing in Spectral domain Spatial domain Temporal domain Links with GIS Data bases Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 5 of 23
- 6. Introduction Use of OTB & Monteverdi Sample cases Comments Overview of the program 1. Radiometric analysis (Monteverdi) 1.1 Colorization and spectral/radiometric analysis 1.2 Manual segmentation (1 band and 2 bands) 2. NDVI (Monteverdi then OTB Applications) 2.1 Computation and segmentation 2.2 Change detection 3. Supervised classification (Monteverdi then OTB Applications) 3.1 Classification of one date 3.2 Classification of two dates 3.3 Classification of SITS 4. Case study (Monteverdi then OTB Applications) 4.1 Detection of forest in historical maps 4.2 Classification of urban areas Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 6 of 23
- 7. Introduction Use of OTB & Monteverdi Sample cases Comments Data 1 Figure: Fabas forest area - <2013-10-12 Sat> (Pleiades - © CNES 2013, distribution Airbus DS / Spot Image). Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 7 of 23
- 8. Introduction Use of OTB & Monteverdi Sample cases Comments Data 2 Figure: Fabas forest area - <2013-12-10 Tue> (Pleiades - © CNES 2013, distribution Airbus DS / Spot Image). Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 8 of 23
- 9. Introduction Use of OTB & Monteverdi Sample cases Comments Introduction Use of OTB & Monteverdi Sample cases Comments Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 9 of 23
- 10. Introduction Use of OTB & Monteverdi Sample cases Comments Configuration Ubuntu (14.04) LTS OTB, Monteverdi from PPA RAM: 4 GB CPU: Intel 4 Cores Drive storage: 5 GB /tmp: 2GB Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 10 of 23
- 11. Introduction Use of OTB & Monteverdi Sample cases Comments Monteverdi Open and visualize remote sensing images Use visualization tools of Monteverdi Radiometric analysis Simple segmentation (BandMath) -exp "(im1b1<-0.29?1:(im1b1<0.1297?2:(im1b1<0.2597?3:4)))" Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 11 of 23
- 12. Introduction Use of OTB & Monteverdi Sample cases Comments From Monteverdi to OTB Apps Change detection Figure: Before Figure: After Analysis the changes in terms of radiometric variation using Monteverdi tools Set-up an algorithm Implement it using OTB Apps Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 12 of 23
- 13. Introduction Use of OTB & Monteverdi Sample cases Comments OTB Apps #!/bin/bash # NDVI for i in *tif do otbcli_RadiometricIndices -in $i -list Vegetation:NDVI -channels.red 3 -channels.nir 4 -out ${i%%.tif}_ndvi.tif done # Difference NDVI after/before otbcli_BandMath -il *_ndvi.tif -out diff_ndvi.tif -exp "im1b1-im2b1" # Threshold otbcli_BandMath -il diff_ndvi.tif -out change_detection.tif -exp "(im1b1<-0.34?1:0)" Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 13 of 23
- 14. Introduction Use of OTB & Monteverdi Sample cases Comments Introduction Use of OTB & Monteverdi Sample cases Comments Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 14 of 23
- 15. Introduction Use of OTB & Monteverdi Sample cases Comments Comparison of classifiers 1/2 Different data sets <2013-12-10 Tue> <2013-10-12 Sat> <2013-10-12 Sat> and <2013-12-10 Tue> Different methods K-nn Linear SVM GMM (Bayes) RF Different training/validation set (15 Groups) otbcli_TrainImagesClassifier -io.il $name -io.vd ref_data.shp -sample.mv 5000 -sample.mt 1000 -sample.vtr 0.5 -sample.edg false -sample.vfn Class -classifier knn -io.out classif_model/knnModel.txt -io.confmatout classif_model/KnnConfusionMatrix.csv Collaborative spreadsheet https://www.ethercalc.org Discussion on: Classification accuracy Processing time Model Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 15 of 23
- 16. Introduction Use of OTB & Monteverdi Sample cases Comments Comparison of classifiers 2/2 Figure: Classification using two dates Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 16 of 23
- 17. Introduction Use of OTB & Monteverdi Sample cases Comments Construction of SITS Data sets: 13 FORMOSAT-2 images Figure: Dates available Workplan: Build the SITS Discriminate between winter/summer crops One solution: # Compute the NDVI for each date for i in Sud*.tif do otbcli_BandMath -il $i -out ${i%%.tif}_ndvi.tif -exp "(im1b4-im1b3)/(im1b4+im1b3)" done # Concatenate all dates otbcli_ConcatenateImages -il *_ndvi.tif -out serie_2012.tif # Clean rm *_ndvi.tif Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 17 of 23
- 18. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 19. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 20. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 21. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 22. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 23. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 24. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 25. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 26. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 27. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 28. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 29. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 30. Introduction Use of OTB & Monteverdi Sample cases Comments Interpretation of SITS Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 18 of 23
- 31. Introduction Use of OTB & Monteverdi Sample cases Comments Analysis of the model Figure: Mean temporal NDVI Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 19 of 23
- 32. Introduction Use of OTB & Monteverdi Sample cases Comments Spatial filtering Morphological operations Median and mean filter Figure: Historical map Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 20 of 23
- 33. Introduction Use of OTB & Monteverdi Sample cases Comments Spatial filtering Morphological operations Median and mean filter Figure: Filtered image Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 20 of 23
- 34. Introduction Use of OTB & Monteverdi Sample cases Comments Introduction Use of OTB & Monteverdi Sample cases Comments Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 21 of 23
- 35. Introduction Use of OTB & Monteverdi Sample cases Comments Could be improved Installation Visualization of data (?) Dynamic (for labeled data) Profile (temporal, spectral . . . ) Classification process Number of selected pixels ? Which ones ? Separate process training/validation Regression, estimation ? Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 22 of 23
- 36. Introduction Use of OTB & Monteverdi Sample cases Comments Positive points Monteverdi & OTB Apps work really well Fast and light More powerful than . . . Free and multiplatform Customizable Template filters Geodesic filters . . . Mathieu Fauvel Teaching Remote Sensing with OTB Applications & Monterverdi (and a little of Bash) 23 of 23