First%20experiences%20with%20PHOTOMOD%20 - PowerPoint PPT Presentation

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First%20experiences%20with%20PHOTOMOD%20

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From Imagery to map: digital photogrammetric technologies ... Autometric Softplotter RACURS Photomod RACURS PHOTOMOD full local suite. PHOTOMOD Core ... – PowerPoint PPT presentation

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Title: First%20experiences%20with%20PHOTOMOD%20


1
First experiences with PHOTOMOD at the Lab. of
Photogrammetry of NTUA
  • A. Georgopoulos, Ch. Ioannidis, S. Tapinaki, S.
    Ioakeim, I. Papageorgaki
  • Laboratory of Photogrammetry
  • School of Rural Surveying Engineering
  • National Technical University of Athens (NTUA)
  • drag_at_central.ntua.gr

From Imagery to map digital photogrammetric
technologies Attica October 2009
2
Overview
  • Introduction
  • The Photogrammetry Lab of NTUA
  • Educational Research activities
  • Instrumentation (H/W S/W)
  • The contribution of Racurs PHOTOMOD
  • Close Range application
  • Aerial photogrammetric application
  • Conclusions

3
The Laboratory of Photogrammetry
  • Established in 1917
  • Education in Photogrammetry and Cadastre (and
    Remote Sensing until 1988)
  • 3 Faculty members in Photogrammetry
  • 3 Supporting staff (2 Surv. Eng 1 technical)
  • 10 PhD students

4
Educational Activities
  • Photogrammetry courses (undergraduate)
  • 2 compulsory (100 students per year)
  • Photogrammetry I II (5th 6th sem.)
  • 3 electives
  • Photogrammetry III (7th sem.)
  • Photographic Data Acquisition (8th sem.)
  • Photogrammetry summer field course (9th sem.)
  • Contribution in
  • Metrology (8th sem.)
  • Postgraduate courses

5
Research Activities
  • Digital photogrammetric procedures
  • Digital automation
  • Exploitation of innovative acquisition systems
    (LiDAR, SAR etc.)
  • Close Range Applications
  • Geometric Documentation of Monuments

6
Instrumentation
  • Data Acquisition Systems
  • 2 Digital Cameras (8MP, 21MP)
  • Photogrammetric scanner (Z/I PhotoScan )
  • Terrestrial Laser Scanner (Leica ScanStation 2 )
  • Structured Light Scanner (XYZRGB SL2)
  • Digital Photogrammetric Workstations
  • Z/I SSK
  • Leica LPS
  • Autometric Softplotter
  • RACURS Photomod

7
RACURS PHOTOMOD full local suite
  • PHOTOMOD Core
  • PHOTOMOD AT
  • PHOTOMOD SolverA
  • PHOTOMOD SolverS
  • PHOTOMOD DTM
  • PHOTOMOD Mosaic
  • PHOTOMODStereoDraw
  • PHOTOMOD VectOr

8
Contribution
  • Education
  • Demo in class (Photogrammetry I)
  • Laboratory exercise (Photogrammetry II)
  • Extensive use in the practical courses
  • Research
  • Implementation in Diploma Theses
  • Use in related research projects

9
Implementation Examples
  • Close Range
  • Geometric Documentation of a Church in Cyprus
  • Aerial Phtoogrammetry
  • Alternative method for measuring the Classical
    Marathon Course

10
Geometric Documentation of a Church in Cyprus
  • Photogrammetric station PHOTOMOD
  • Interior orientation
  • Exterior orientation
  • DEM collection ? Orthophoto
  • Exterior orientation DTM Collection
    Orthophoto
  • Archis
  • Image rectification

11
Products
Façades
Horizontal Section
Cross-Sections
12
Alternative method for measuring the Classic
Marathon Course
13
Alternative method for measuring the Classic
Marathon Course
  • 34 colour aerial photos, 2005
  • Z/I RMK Top (c 153.12 mm)
  • Scale 115000
  • Colour diapositives scanned at 21µm
  • 550 MB per frame

14
Alternative method for measuring the Classic
Marathon Course
Aerial images distribution
15
Alternative method for measuring the Classic
Marathon Course
  • Relative Orientation 0,003 0,012 mm
  • Absolute Orientation using bundle adjustment
  • 17 GCPs
  • 2 Iterations
  • RMS 0.09m in X,Y and Z
  • DTM
  • Automatic ? 25 erroneous (buildings or large
    homogenous areas)
  • Orthophoto production

16
Orthophotography
17
Conclusions
  • Advantages
  • Easy to learn
  • Accepts many image formats
  • Flexible in pointing during RO and AO
  • Disadvantages
  • Slow in opening images
  • Problematic in displaying stereo vision
  • Suggestion
  • Incorporation of rectification algorithm
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