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XVIIIth Congress (Part B5)

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fullscreen: XVIIIth Congress (Part B5)

Multivolume work

Persistent identifier:: 1667435949

Title:: XVIIIth Congress

Sub title:: Vienna, Austria 1996

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667435949

Language:: English

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1667448226

Title:: XVIIIth Congress

Scope:: 626 Seiten

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667448226

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(31,B5)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist anhand des Copyrightjahrs ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Non-Cartographic Applications of Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Non-Cartographic Applications of Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Non-Cartographic Applications of Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Non-Cartographic Applications of Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: DIGITAL MONOPLOTTING AND PHOTO-UNWRAPPING OF DEVELOPABLE SURFACES IN ARCHITECTURAL PHOTOGRAMMETRY G. E. Karras, P. Patias, E. Petsa

Document type:: Multivolume work

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Contents

Table of contents

XVIIIth Congress
XVIIIth Congress (Part B5)
Cover
Title page
ISPRS Council 1992 - 1996
International Archives of Photogrammetry and Remote Sensing (IAPRS)
Volume XXXI, Part B5
Technical Commission V Close-Range Techniques and Machine Vision
Editorial Team
Copyright 1996
For Sale after the Congress
Foreword
Table of Contents
DIE PHOTOGRAMMETRISCHE ERGÄNZUNG DER KARTE VON HATTUSAS,DER HAUPTSTADT DES HETHITER REICHES Sitki KÜLÜR, Orhan ALTAN, Gónül TOZ,. Dursun Z. SEKER, Asli IYIDIKER, Harun IYIDIKER, Zaide DURAN
UNIFORMITY AND PROXIMITY APPLIED TO THE GENERALISATION OF TARGET FIELDS IN CLOSE RANGE PHOTOGRAMMETRY. L. C. Anderson (Masters Candidate) and C. J. Bellman (Lecturer)
VIA GEORGOFILI MAY, 27 1993: A TESTIMONY Antonio Arrighi
3D DETAILED RECONSTRUCTION OF A DEMOLISHED BUILDING BY USING OLD PHOTOGRAPHS C. loannidis, C. Potsiou, J. Badekas
ANALYTICAL PHOTOGRAMMETRY FOR THE SURVEY OF THE GOLDEN ALTAR OF S. AMBROSE'S BASILICA IN MILAN Elena Baj, [...]
PAROS:UN SYSTÈME D'INFORMATION POUR L’ARCHITECTURE L. Baratin - [...] G. Follonit - [...] J-.P. Saint Aubin - [...]
PHOTOGRAMMETRIC MEASUREMENT OF DEFORMATIONS OF THE GABCIKOVO LOCK GATE BARTOS P. - GREGOR V.
ANALYSIS OF RESIDUALS FROM L1 NORM ESTIMATION John Marshall [...] James Bethel [...]
VALVE MEASUREMENT USING PHOTOGRAMMETRIC FEATURE MODELING Alan Voss [...] James Bethel [...]
METHODS OF SURVEYING IN ARCHAEOLOGY DEMONSTRATED AT THE TANG EMPERORS’ MAUSOLEUMS Wolfgang Böhler and Guido Heinz
THE OPTICAL TUBE MEASUREMENT SYSTEM OLM - PHOTOGRAMMETRIC METHODS USED FOR INDUSTRIAL AUTOMATION AND PROCESS CONTROL Werner Bösemann
OBJECT RECOGNITION USING MULTI-SENSOR FUSION AND ACTIVE EXPLORATION Claus Brenner and Michael Hahn
Long Terme Photogrammetric Measuremend of Rockfill Dam Jozef Cernansky
AN EVALUATION OF THREE DIFFERENT IMAGE CAPTURE METHODS FOR MEASUREMENT AND ANALYSIS OF DEFORMATION WITHIN A GEOTECHNICAL CENTRIFUGE J. Chen, S. Robson, M. A. R. Cooper, & R. N. Taylor
A NEW SYSTEM OF SURFACE MEASUREMENT N. Kochi,H. Ohtani,S. Nakamura, T. Utiyama, M. Yamada, M. Chida, T. Noma, T. Ito,H. Aokı
A STUDY ON REAL-TIME PHOTOGRAMMETRY FOR ARCHAEOLOGICAL SITES USING WIRELESS CCD CAMERA Hirofumi CHIKATSU, Kazuya NAKANO, Tetsuji ANAI
DYNAMIC ANALYSIS OF HUMAN MOTION USING SEQUENTIAL IMAGES OF VIDEO THEODOLITE Hirofumi CHIKATSU, Tetsuji ANAI, Hideharu YANAGI [...] Shunji MURAI [...]
Ortho Projection and Drawing for Archeological Artifacts of complicated form Hiroshi YOKOYAMA [...] Katsuhiro HATANO, Hirofumi CHIKATSU [...]
Stereo Light Microscope Calibration for 3D Submicron Vision Gaudenz Danuser
GENERATION OF A PANORAMA MOSAIC FOR THE DOME OF A PLANETARIUM Piero de Fazio, [...] Josef Jansa, [...]
PHOTOGRAMMETRY AND SURVEY PROCEDURES FOR THE ANALYSIS OF VENETIAN VILLAS: THE CASE STUDY OF VILLA ZENO BY ANDREA PALLADIO Clemente di Thiene - Francesco Guerra - Luigi Fregonese - Luca Pilot - Caterina Balletti
INFLUENCE OF LARGE TARGETS ON THE RESULTS OF PHOTOGRAMMETRIC BUNDLE ADJUSTMENT Jürgen Dold
PHOTOGRAMMETRICAL APPLICATIONS TO AERIAL ARCHAEOLOGY AT THE INSTITUTE FOR PREHISTORY OF THE UNIVERSITY OF VIENNA, AUSTRIA Michael Doneus
MEASUREMENT IN HAZARDOUS ENVIRONMENT: REVIEW OF SEVERAL APPLICATIONS Arnaud DUMONT - Technical Manager
IMPLEMENTATION OF SEQUENTIAL ESTIMATION FOR SINGLE-SENSOR VISION METROLOGY Kenneth Edmundson and Clive S. Fraser
TWO 3-D SENSORS FOR ENVIRONMENT MODELING AND VIRTUAL REALITY: CALIBRATION AND MULTI-VIEW REGISTRATION S. F. El-Hakim, J.-A.Beraldin, G. Godin, and P. Boulanger
A COMPARISON OF THE PERFORMANCE OF DIGITAL AND CONVENTIONAL NON-METRIC CAMERAS FOR ENGINEERING APPLICATIONS W. Faig, H. El-Habrouk, X. P. Li, M. Hosny
Vibration Monitoring with Video Cameras C. K. Lee and W. Faig
DEVELOPING OF THE SURFACE MODELL OF HUMAN GUMS Dr Károly Fekete
PAROS: Le sens de la mesure. Photogrammétrie et modéles architecturaux: Le cas du forum antique de la ville d' Arles (France) Michel Florenzano, Jean-Yves Blaise, Pierre Drap
PHOTOREALISTIC PRESENTATION OF THE PALAIS GRAND DUCAL BASED ON PHOTOGRAMMETRIC RECORDING Peggy Freudenreich, [...]
SINGLE STATION SELF-CALIBRATION TECHNIQUES John G. FRYER
A COMPARISON OF THE UTILITY AND EFFICIENCY OF DIGITAL PHOTOGRAMMETRY AND INDUSTRIAL THEODOLITE SYSTEMS Giuseppe Ganci [...] Mark R. Shortis [...]
PHOTOGRAMMETRIC QUANTIFICATION OF CHANGES OF SOFT TISSUE AFTER SKELETAL TREATMENT OF THE FACIAL PART OF THE SKULL Dr.-Ing. Helga Gäbel, Dr.med. Dr.med.dent. Diana Kakoschke
A 3D-SENSOR FOR THE MEASUREMENT OF PARTICLE CONCENTRATION FROM IMAGE SEQUENCES Peter Geißler [...] Bernd Jähne [...]
ARCHEOLOGICAL PHOTOGRAMMETRY WITH SMALL FORMAT CAMERAS: THE SURVEY OF THE FORUM VETUS IN SARMIZEGETUSA (ROMANIA) Pierre GRUSSENMEYER and Franck PERDRIZET
ARCHEOLOGY AND PHOTOGRAMMETRY: THE SITE OF LAODICEIA AD LYCUM (TURKEY) dott. Francesco Guerra
RECONSTRUCTION OF THE DEFORMATION SURFACE OF CFER PANELS Forlani G. - Guzzetti F. -Pinto L.
A GENERAL APPROACH FOR OBJECT ORIENTED 3D-MAPPING IN DIGITAL CLOSE RANGE RESTITUTION Klaus Hanke, Associate Professor [...] Mostafa Abdel-Bary Ebrahim, M.Sc. [...]
OBJECT RECONSTRUCTION FROM IMAGES OF A MOVING CAMERA Jussi Heikkinen
DIGITAL MICROPHOTOGRAMMETRY WITH THE SCANNING ELECTRON MICROSCOPE Matthias Hemmleb, Jörg Albertz [...] Manfred Schubert, Andreas Gleichmann, Johann Michael Köhler [...]
A NOVEL SYSTEM FOR THE COMBINED MEASUREMENT OF WAVE- AND FLOW-FIELDS BENEATH WIND INDUCED WATER WAVES Frank Hering, Günther Balschbach, Bernd Jähne
OBJECT-ORIENTED DATA-INTEGRATION BETWEEN DIGITAL ARCHITECTURAL PHOTOGRAMMETRY AND CAAD Urs Hirschberg, Dipl. Arch. ETH
REAL TIME TRACKING OF A DYNAMIC OBJECT Amir Saeed Homainejad
DIGITAL STEREOPHOTOGRAMMETRIC SOLUTIONS FOR ORTHODONTICS Wolfram Höflinger
OBJECT RECOGNITION FOR A FLEXIBLE MANUFACTURING SYSTEM Y. Huang & J. C. Trinder & B. E. Donnelly
DIGITAL STEREOPLOTTER FOR HISTORIC MONUMENTS RECORDING Jozef J. Jachimski, Janusz M. Zielinski
PRACTICAL INTEGRATION OF VISION METROLOGY AND CAD IN SHIPBUILDING George W. Johnson, [...]
SOME SPECIAL CASES OF CLOSE RANGE PHOTOGRAMMETRY APPLICATION Dusan Joksié, Milos Vojinovic
MEASUREMENT OF SPINAL DEFORMITIES USING STEREOPHOTOGRAMMETRY K Jones [...] G N Askin, W E Ryan, C Natalie and A D Porter [...]
CLOSE RANGE PHOTOGRAMMETRY USING GEOMETRIC PRIMITIVES FOR EFFICIENT CAD MODELLING OF INDUSTRIAL PLANT M. A. Jones, D. P. Chapman, and A. A. Hamid [...] A. T. D. Deacon [...]
DIGITAL MONOPLOTTING AND PHOTO-UNWRAPPING OF DEVELOPABLE SURFACES IN ARCHITECTURAL PHOTOGRAMMETRY G. E. Karras, P. Patias, E. Petsa
IMAGE SEQUENCE ANALYSIS Dana Klimesova, Tomás Suk
STEREOSCOPIC COMPUTER MEASUREMENTS OF MULTY-TIME IMAGES FOR INVESTIGATION OF MOUNTAIN GLACIER MOVEMENTS prof. Yu. F. Knizhnikov, R. N. Gelman
DRAWING UP OF FIREWORKS VIEWING AREA MAP Tosio KOIZUMI [...] Kunihiko ONO [...] Hideaki KAWASAKI [...]
ARCHITECTURAL PHOTOGRAMMETRY AND PICTURE PROCESSING FOR ACQUISITION AND DOCUMENTATION OF A BRAZILIAN TOWN ENSEMBLE S. Landes, H.-P. Bähr and K. Ringle
QUANTITATIVE 3D-MICROSCOPY FOR PHOTODYNAMIC THERAPY OF CANCER CELLS Leemann Th, Margadant F, Walt H, Niederer P
An Underwater Digital Photogrammetric System For Fishery Geomatics Rongxing Li, Chuang Tao, and Weihong Zou [...] R. G. Smith and T. A. Curran [...]
RESULTS OF THE GERMAN COMPARISON TEST FOR DIGITAL POINT OPERATORS Thomas Luhmann
DEVELOPMENTS TOWARDS REMOTE METROLOGY FOR COMPONENT ALIGNMENT UNDER CONDITIONS OF RESTRICTED ACCESS IN JET'S TOROIDAL VACUUM VESSEL B. Macklin, R. Brade, G. Celentano, J. Tait, E. van Lente
"FREE-FLYING" 3-D SENSORS FOR EFFICIENT CLOSE-RANGE MEASUREMENT AND REVERSE ENGINEERING Reinhard W. Malz, [...]
TOWER CASTLE OF GARCIA D’AVILA - FIRST OUTCOMES FOR THE RESTORATION PROCEDURES Camillo José Martins Gomes - [...] Walter da Silva Prado - [...] Christováo Dias de Avila Pires Junior - [...] Herbert Erwes - [...] Luiz Eduardo Pereira Alves - [...]
Data Fusion of Three-dimensional Measurement and CAD in Plant Construction (with the application to prefabricated manufacture of chemical engineering pipe line as an example) A. Matsumoto and F. Souda
KOMBINATION VON PHOTOGRAMMETRIE UND STREIFENPROJEKTION ZUR VERMESSUNG GROSSER OBJEKTE Dr. Martin Michaelis
ISSUES IN MEDICAL PHOTOGRAMMETRY IN THE DIGITAL IMAGING ERA Harvey L. Mitchell [...] Thomas Leemann [...]
DENTURE MOBILITY MEASURING SYSTEM OF COMPLETE DENTURES USING FOUR INFRARED VIDEO CAMERAS K. MIYASHITA, T. SEKITA, S. MINAKUCHI, Y. HIRANO, K. KOBAYASHI and M. NAGAO
Archaeological Real-time Photogrammetric System using Digital Still Camera Yoshito MIYATSUKA
DISCUSSION ON THE AUTOMATIC MEASUREMENT OF TRAFFIC FLOW BY VIDEO CAMERA MOUNTED ON BALLOON Masaru MORI, Masahiro SETOJIMA, Yukio AKAMATSU [...] Ryo YAMANA, Takashi YAHARA [...]
FRAMES BASED ANALYSIS OF MULTISENSOR IMAGE SEQUENCES Yury V. Morzeev, Yury V. Visilter, Sergei Y. Zheltov, Alexander A. Stepanov
CLOSED-FORM SPACE RESECTION USING PHOTO SCALE VARIATION by Riadh A. H. Munjy, Mushtaq Hussain
MEASUREMENT OF RAILWAY SURFACE FLAWS WITH THE CCD LINE SENSOR CAMERA SYSTEM Yoshitaka Matsumoto, Osamu Murakami [...] Masaya Nakagawa [...]
ACCURACY IMPROVEMENT IN COMPUTATIONAL CLOSE-RANGE PHOTOGRAMMETRY BY THE USE OF MULTI-CONTROL VARIABLE (NCV) MONTE CARLO METHOD H. N. Nagaraja, [...]
EVALUATION OF A LOW COST DIGITAL PHOTOGRAMMETRIC SYSTEM FOR MEDICAL APPLICATIONS P. R. Thomas and I. Newton [...] K. B. Fanibunda [...]
A VIDEO-RATE STEREO MACHINE AND ITS APPLICATION TO VIRTUAL REALITY Kazuo Oda, Masaya Tanaka, Atsushi Yoshida, Hiroshi Kano and Takeo Kanade
A Reconstruction of the Ancient City of Ayutthaya Using Modern Photogrammetric Techniques Cliff Ogleby
A STUDY ON THE DEVELOPMENT OF SEMI-METRIC CAMERA FOR VERY CLOSE-RANGE PHOTOGRAMMETRY W. J. Oh [...] S. H. Han [...] S. H. Song, S. H. Bae, H. S. Lee [...]
THE DESIGN AND SIMULATION OF VIDEO DIGITIZING BY USING THREE-DIMENSIONAL CAD-MODELS Ms. Katri Oksanen, [...]
NUMERICAL INVENTORY OF ARCHITECTURAL OBJECTS Jolanta Orlinska, Ryszard Preuss
STEREOPHOTOGRAMMETRIC MAPPING OF THE ANTERIOR SURFACE OF THE HUMAN CORNEA Dr Jon Osborn, [...] Dr Gordon Wise, [...]
CAD-SUPPORTED DETERMINATION OF SENSOR ATTITUDE IN TERRESTRIAL PHOTOGRAMMETRIC APPLICATIONS A. D. Styliadis, P. Patias, J. Paraschakis
CONTRIBUTION OF VIDEOGRAMMETRY TO THE ARCHITECTURAL RESTITUTION Results of the CIPA "O. Wagner Pavillion" test P. Patias, A. Streilein
THE CIPA "O. Wagner Pavilion" TEST A. Almagro, P. Patias, P. Waldhäusl
HIGH RESOLUTION DATA ACQUISITON TO OBSERVE MOVING OBJECTS Jürgen Dold, [...] Jürgen Peipe, [...]
CAD-based Reverse Engineering with Digital Photogrammetry Frank Petran, Peter Krzystek [...] Peter Bonitz [...]
CONFIGURATION OPTIMIZATION AND OPERATING RANGE ENLARGEMENT OF CCD-VIDEO-CAMERAS Dipl.-Ing. Bernd Pollak, [...]
IMPLEMENTATION OF DIGITAL 3D-MODELS IN BUILDING SURVEYS BASED ON MULTI IMAGE PHOTOGRAMMETRY Günter Pomaska, [...]
THE DYNAMIC DIGITAL PHOTOGRAMMETRIC MEASUREMENT AND VISUALISATION OF A 21M WIND TURBINE ROTOR BLADE UNDERGOING STRUCTURAL ANALYSIS. S. Robson and H. B. Setan.
Multi-Image Correlation for Digital Photogrammetric Measurement Systems Heinz Rüther [...] Graeme van der Vlugt [...]
A MULTI-VIEW TRINOCULAR SYSTEM FOR AUTOMATIC 3-D OBJECT MODELING AND RENDERING F. Pedersini, A. Sarti, S. Tubaro
CCD MULTICAMERAS INTERACTIVE DIGITAL SYSTEM FOR CLOSE RANGE PHOTOGRAMMETRIC APPLICATIONS Piotr Sawicki, Boguslaw Wiecek
TARGET DETECTION AND EPIPOLAR GEOMETRY FOR IMAGE ORIENTATION IN CLOSE-RANGE PHOTOGRAMMETRY Gianfranco Forlani, Alberto Giussani, Marco Scaioni [...] Giorgio Vassena [...]
IMPROVEMENT OF FISHFARM PEN DESIGN USING COMPUTATIONAL STRUCTURAL MODELLING AND LARGE-SCALE UNDERWATER PHOTOGRAMMETRY (COSMOLUP) Heinrich Schewe, [...] Erik Moncrieff, [...] Prof. Dr.-Ing. Lothar Gründig, [...]
DPA-WIN - A PC BASED DIGITAL PHOTOGRAMMETRIC STATION FOR FAST AND FLEXIBLE ON-SITE MEASUREMENT Carl-Thomas Schneider
MULTIPLE FOCUS CALIBRATION OF A STILL VIDEO CAMERA Mark R. Shortis [...] Stuart Robson and Tim Short [...]
LASER DOT MATRIX BASED DIGITAL SYSTEM FOR FOR MONITORING TEXTURELESS ROOF STRATA OF MINES R. Singh, D. P. Chapman and K. B. Atkinson
THE CONSTRUCTION OF AN ANCIENT BAS-RELIEF REPLICA USING PHOTOGRAMMETRIC METHODS AND CNC TECHNIQUES E. STAMBOULOGLOU, [...]
UTILIZATION OF CAD MODELS FOR THE OBJECT ORIENTED MEASUREMENT OF INDUSTRIAL AND ARCHITECTURAL OBJECTS Andre Streilein
ADVANCED STUDY OF NON-PRISM LASER RANGER AND IT'S IMAGING (Low-Cost 3D Imaging and Range Imaging Using Non-Prism Laser-Ranger) YOSHIAKI TAKAHASHI, HIDENORI ITOH, NORITSUNA FUJII
A study and development for STEREO FUNDUS CAMERA SYSTEM using Stereo Matching Technique. TSURU Kosuke, Inoue T., Ogino N., Matuyama M., [...] Nanjo T., Yano. N., Hino T. [...]
SPECTRAL ANALYSIS OF A HUMAN WALKING SEQUENCE USING MEDIAL STEREO IMAGES Masako TSURUOKA, Ryosuke SHIBASAKI, Shunji MURAI [...] Masahiro KURITA [...] Takao WADA [...]
SUR L’UTILISATION DES CONTRAINTES À L'AJUSTEMENT SIMULTANE DES OBSERVATIONS PHOTOGRAMMETRIQUES ET GEODESIQUES DANS LA PHOTOGRAMMÉTRIE À COURTE DISTANCE Prof.dr.ing. Lucian Turdeanu, Chef de travaux ing. Ion Ionescu
THE USE OF MULTIPLE SURVIEWS OF A COMPUTED TOMOGRAPHY SCANNER TO DETERMINE THE 3D COORDINATES OF EXTERNAL CRANIAL MARKERS Van Geems B. A.
AUTOMATIC DEM GENERATION USING DIGITAL SYSTEM InduSCAN: AN APPLICATION TO THE ARTWORKS OF MILANO CATHEDRAL FINALIZED TO REALIZE PHYSICAL MARBLE COPIES Marco Scaioni [...] Giorgio Vassena [...] Torsten Kludas, Jens-Uwe Pfeil [...]
AN ALGORITHMIC METHOD FOR REAL-TIME 3-D MEASUREMENT X. Wang. & T. A. Clarke.
RECOVERING 3-D OBJECT GEOMETRY USING A GENERIC CONSTRAINT DESCRIPTION S. Weik, O. Grau
IST DIE PHOTOGRAMMETRIE REIF FÜR DAS MUSEUM? Rolf-Dieter Düppe und Manfred Weisensee
DIGITAL ORTHOIMAGES IN ARCHITECTURAL PHOTOGRAMMETRY USING DIGITAL SURFACE MODELS Albert Wiedemann
CULTURAL ASSETS PRESERVATION USING DIGITAL PHOTOGRAMMETRY METHODS YEU, Bock-Mo Professor, KIM, Wondae Ph.D Student [...] KIM, Yong-ll Associate Professor, RYU, Yeon Undergraduate Student [...]
Appendix: Authors and Co-authors Index Volume XXXI, Part B5 - ISPRS Commission V
Appendix: Keywords Index Volume XXXI, Part B5 - ISPRS Commission V
Cover

Full text

DIGITAL MONOPLOTTING AND PHOTO-UNWRAPPING
OF DEVELOPABLE SURFACES IN ARCHITECTURAL PHOTOGRAMMETRY
G. E. Karras, P. Patias*, E. Petsa
Department of Surveying, National Technical University of Athens, GR-15780 Athens, Greece
*Department of Surveying, The Aristotle University of Thessaloniki, GR-54006 Thessaloniki, Greece
Commission V, Working Group 4
KEY WORDS: Monoplotting, Digital Surface Development, Image Transformation, Mosaic, Architecture
ABSTRACT
It is to the interest of both the photogrammetrist and the non-expert user that image-based measuring techniques and
user-oriented packages applied to architectural and archaeological documentation be kept as simple as possible. In this
context, the potential of single-image techniques should be exhausted, confining stereoscopic procedures to irregularly-
shaped surfaces. This contribution discusses a monoscopic approach for regular 3D surfaces whose known analytical
expression provides the missing equation. Products may be in both vector and raster forms obtained via monoplotting
and orthoimaging, respectively. Further, in the cases of developable surfaces (e. g. circular cylinders) digital unwrapping
of the original images can also be performed. Finally, the basic concept is tested with six non-metric photographs fully
covering a small late-19"-centrury railway water-tower having the shape of a right circular cylinder. The unwinded plot of
the surface as well as the mosaic of the digitally unwrapped images are presented.
1. INTRODUCTION
Documentation and conservation of cultural heritage are
being increasingly seen as tasks of national — ultimately
international — priority. Due to the digital techniques, pho-
togrammetry now appears as more efficient and inexpen-
sive; today's user-oriented software is easier to handle by
non-experts, thus widening the potential spectrum of ap-
plication in architectural and archaeological recording.
Thanks to its simplicity, image rectification remains the
most popular method in this field for both photogramme-
trists and users. But when object anaglyph exceeds the
tolerances of planarity, stereo or multi-image configura-
tions need to be considered. Notwithstanding the merits of
commercial software packages for relatively simple work
in close-range, the use of more images at a time does not
appeal to non-expert users but also raises cost; besides,
the point-wise reduction schemes are basically adequate
only for objects consisting of planes (for instance, conti-
nuous non-straight lines such as the outlines of a curved
wall-stone cannot be mapped). Of course, complications
and requirements in instrumentation grow rapidly once
stereoviewing is introduced.
Thus, it is expedient to go beyond the limitation of near-
planarity (posed by rectification) by exhausting the poten-
tial of 'monoplotting'. Its application to irregularly shaped
surfaces requires a digital elevation model (DEM). Con-
trary to aerial mapping tasks where ground DEMs may al-
ready be at hand from previous work, in terrestrial ap-
plications DEMs have first to be created. But — 'halfway'
between flatness and irregular relief — smooth surfaces
which may be approximated analytically are often to be
met in close-range applications. Among these, quadrics
are most widely encountered: cylindrical, spherical, conic
or parabolic analytical surfaces are suitable for partly, or
fully, describing shape for a variety of ancient theatres or
tombs and also churches, monasteries, towers, rotundas,
domes, cupolas, vaults, ceilings, mills, lighthouses, facto-
ries, aqueducts, chimneys etc. (to which several industrial
objects may be added).
290
On the one hand, the need for geometric shape-fitting to
3D data is now situated within the context of the growing
use of CAD systems (Chandler & Cooper, 1991); on the
other, second order surface fitting to points sampled by
photogrammetry has been employed to establish theoreti-
cal shape and check discprepancies (Feltham, 1990; Fo-
tiou et al., 1991) as well as for mapping and orthophoto
production tasks (Restle & Stephani, 1988). Questions of
‘flattening’ non-developable surfaces, e.g. spherical, have
also been addressed (Vozikis, 1979).
In this contribution, the basic idea lies in the recognition
that known analytical surfaces provide the missing third
equation supplementing the collinearity condition, hence
permitting mapping from single images. Unlike conventio-
nal monoplotting, this procedure is direct (non-iterative).
However, certain questions regarding non-uniqeness of
solution have to be answered. In the case of a develop-
able surface, monoplotting can further result in unwinded
vector data. In fact, for such objects not only the genera-
tion of orthoimages is possible; digital 'unwrapping' of the
original imagery and subsequent mosaicking may also be
performed with simple means and suitable software. In
this manner, full all-around development retaining all the
wealth of the original raster data may be generated. Here,
the underlying concept is exemplified by the case of right
circular cylinders but may well be accordingly extended to
the other analytical surfaces.
2. ANALYTICAL SURFACE FITTING
The best-fitting analytic expression of a quadric surface is
determined either directly (in the simple cylindrical case a
perimeter suffices) or by fitting to redundant points mea-
sured geodetically or photogrammetrically. A distinction is
made between cases where surface type is given or ‘ob-
vious’ and its specific equation is to be found; and instan-
ces where the surface type is not assumed beforehand.
In this last case the full second order equation of nine in-
dependant unknowns is fitted to the 3D point set. General-
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