Modern trends of education in photogrammetry & remote sensing

Bibliographic data

Monograph

Persistent identifier:: 856467936

Title:: Modern trends of education in photogrammetry & remote sensing

Sub title:: ISPRS Commission VI Symposium, September 13 - 16, 1990, Rhodes Island, Greece

Scope:: 1 Online-Ressource (251 Seiten)

Year of publication:: 1990

Place of publication:: Athens

Publisher of the original:: Technical Chamber of Greece

Identifier (digital):: 856467936

Illustration:: Diagramme

Language:: English

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

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: Education (WG VI/2 and WG VI/7).

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: ON THE IMPORTANCE OF PROJECTIVE GEOMETRY FOR ANALYTICAL AND DIGITAL PHOTOGRAHMETRIC RESTITUTION. Gerhard Brandstatter.

Document type:: Monograph

Structure type:: Chapter

193 t3= 0 Indicates that T Is singular respectively, T*=T-1 of (2.3.1) cannot exist and Illustrates the Impossibility of reconstruction of a spatial object from one single Image. But because of det(T) = 0 the homogeneous systems (2.3.3) become resolvable and produce the affine coordinates uom of the two centers of projection. Using (2.3.5) the relations Ti UM* To + tri-TojuM^ÍTz-To )um 2 -toUM 3 and, consequently, for each Image the two equations {U 1 (tl-tO)~T1lUM 1 +U 1 (T2 —to)UM 2 ~U 1 tOUM 3 =-U 1 to u 2 (tl-to)ynL+{U 2 (T 2 *t0)-t2)UM 2 -U 2 tOUM 3 =-U 2 tO, arise. These are, just as usual, four equations for the three unknown spatial affine coordinates um 1 . In this way every pair of homologous points of P« , Ps delivers a point of the model space Pm, from which the desired orthonormal coordinates may be found by an inverse affine transformation. 3. Final remarks. This paper intended to show by means of two examples, how projective geometry influences the conventional methods of photogrammetry. The most important difference is, that the number of control points or correlation points and, consequently, the expenditure of work increases. On the other side non-metric cameras or measuring devices can be used and all relations are linear. Therefore, projective methods will also be very useful 1 for photogram- metry by digital images and stereovideometry. From the educational point of view, the disadvan tage of a rather abstract geometry exists. However on the other hand a more general insight is gained, which enables also the deduction of the special relations of or thononnal ized metric systems. More over, a lot of problems will result from practical applications and will give new stimulations to photograrmnetri c i nvest i gat i on. References: Brandstätter G.: Fotogrametria proyectiva, pro cesamiento de imágenes digitales, métodos de tele- deteccíon. VI curso de geodesia superior, instututo de astronomía y geodesia, Universidad Complutense de Madrid, octubre 1989 Fuchs H.: Projektive Geometrie; Anwendungen in Photogrammetrie und Robotik. Mitteilungen der geo dätischen Institute der Technischen Universität Graz, Folge 63, August 1988 Hohenberg F. u. J. Tschupik: Die geometrischen Grundla gen der Photogrammetrie - in Handbuch der Vermes sungskunde Jordan/Eggert/Kneissl, Band IIIa/3, J.ß, Metzlersche Verlagsbuchhandlung, Stuttgart 1972 Rinner K.: Studien über eine allgemeine vorausset zungslose Lösung des Folgebildanschlusses. Österreichische Zeitschrift für Vermessungswesen, Sonderheft 23, Wien 1963 Wolf P.R.: Elements of Photogrammetry. International Student edition, Mc Graw-Hill Kogakusha ltd., 1974

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