This document summarizes a study using the open-source photogrammetry software MicMac to extract digital surface models (DSMs) from Pleiades satellite images. The study used MicMac to generate orthophotographs, point clouds, and DSMs of two areas. For one area, the results included a sparse point cloud, orthophotograph, and shaded relief DSM. For the other area, the workflow generated tie points, grid orientation files, and DEMs and orthophotos. The conclusion was that MicMac can create georeferenced DSMs and digital terrain models from Pleiades images with some adaptations. Future work proposed improving the MicMac application and creating 3D reconstructions.

1. DSM Extraction from
Pleiades Images using
MicMac
Muhammad Irsyadi Firdaus
Advisor: Jiann-Yeou Rau
Laboratory of Cyber City
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2. Outline
• Introduction
• Review paper
• Method
• Result and discussion
• Conclusion
• Future work
• Reference
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3. Introduction
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The great agility of Pleiades
satellites with their motion
capability in roll, pitch, and
heading
The very high agility of the satellite platform
Stereo andTristereo acquisitions for 3D
applications

4. 4
DSM is a digital 3D ground model, including the
maximum altitude in every point: with
human superstructures and canopy
MicMac is an open-source
software for image matching,
which is composed of a set of
photogrammetric tools.

5. The main objective of this work was to
create an orthophotographs, point
clouds, and digital surface
models (DSMs) based on MicMac
photogrammetry tools
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6. Review paper
1. Open-source GIS application for UAV photogrammetry based on MicMac
2. EvaluationOfThe Potential Of PleiadesSystem For 3d City Models Production : Building,
Vegetation And DTM Extraction
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7. Method
• Case study
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[L. Duarte, 2016]
shows the location of the selected study areas.
Swinglet and multirotor
model used for Aguda and
Coimbra study case,
respectively

8. Paper 1
• Basic workflow
Image
• Relative Orientation
• Internal Orientation
• Camera Calibration
Tie Point
calculation
Sparse point Cloud
with Camera
Position
Georeferencing
Tapioca Tapas Apericloud Centerbascule
Projection to a
different coordinat
system
Image
rectification
• MDS
• Dense Image
Correlation
• Shaded relief
Orthophoto
Tawny Malt Tarama ChgSysco
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9. Result and discussion
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Sparse point Cloud with Camera Position Sample of the orthoimage with overlaid
check points to assess horizontal accuracy
of the georeferencing process

10. 10Orthophotograph and DSM obtained for Aguda area.

11. 11
Dense point cloud representation
through Cloud Compare software.
Shaded relief image obtained for Aguda area.

12. Paper 2
• Basic workflow
RPC Generating Tie-Points
Generation of the
GRID Orientation
files
Refining Models Correlation
SateLib
DigitalGlobe2Grid
Tapioca
- SateLib RefineModel
- SateLib Dimap2Grid Malt UrbanMNE
Set of Images
generate DEMs
and orthoimages
Sake Refine
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13. Result and discussion
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Example of a building (true orthophoto and shaded DEM) :
there are 2 triangular facets.
Comparison of the original DEM
and the deduced DTM on a hilly
area.

14. Conclusion
• The user does not need to create XML files outside or project the DSM
resulting from MicMac.The application can be easily auto- mated and can
create all the files required to run the workflow and procedures from
MicMac to obtain the georeferenced information
• We can create DEM and DTM from pleiades by using Micmac, as they are
originally implemented for high resolution arial images, considering some
adaptations, they can be pertinent for Pleiades simulation images too.
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15. FutureWork
• To improve the application created with more functionalities and
parameters options, add the possibility of visualizing the 3D point cloud.
• To create 3d reconstruction using a DEM and structured building footprint
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16. Reference
• L. Duarte,A.C.Teodoro, O. Moutinho & J.A. Gonçalves. 2017.Open-source GIS application
forUAV photogrammetry based on MicMac. International JournalOf Remote Sensing.VOL.
38, NOS. 8–10, 3181–3202.
• Melanie Durupt, David Flamanc,Arnaud Le Bris, Corina Iovan and NicolasChampion. 2006.
EvaluationOfThe Potential Of PleiadesSystem For 3d City Models Production : Building,
Vegetation And Dtm Extraction. ISPRS Journal Of Photogrammetry And Remote Sensing.
Volume XXXVI
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