XVIIIth Congress: XVIIIth Congress

kraus, karl; waldhäusl, peter

Bibliographic data

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:: 1667437070

Title:: XVIIIth Congress

Scope:: 230 Seiten

Year of publication:: 1996

Place of publication:: Vienna

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

Identifier (digital):: 1667437070

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(31,B1)

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 Primary Data Acquisition

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 Primary Data Acquisition

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 Primary Data Acquisition

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 Primary Data Acquisition

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:: INCREASED IMAGE QUALITY RESULTING FROM NEW TECHNOLOGIES IN AERIAL CAMERAS Dipl.-Ing. Roland Schlienger, Co-authors: Peter Fricker, Arthur Rohrbach, Holger Schade

Document type:: Multivolume work

Structure type:: Chapter

INCREASED IMAGE QUALITY RESULTING FROM NEW TECHNOLOGIES IN AERIAL CAMERAS Dipl.-Ing. Roland Schlienger Co-authors: Peter Fricker, Arthur Rohrbach, Holger Schade Leica AG, Aerial Visionics Systems CH-9435 Heerbrugg, Switzerland Presented paper for the XVIII Congress ISPRS Vienna, 1996, Commission I, Working Group 1 KEY WORDS: Camera, Aerial, Resolution, Distortion, Performance, Large, Small, Scale. ABSTRACT: A link in terms of image resolution is developed between new optics for the Leica RC30 Aerial Camera with forward image motion compensating device and the new PAV30 Gyro-stabilized camera mount. Moreover the progress in reduction of distortion and improvement of resolution of the Wild / Leica lens cones f = 153 mm and f= 303 mm in the last three decades is shown. Theoretical evaluations illustrate the improvements through compensation of forward motion and angular camera rotations, essentially for large-scale photography. The parameters qualifying image resolution and geometric accuracy in mapping are given for the new 15/4UAG-S and 30/4NAT-S lenses with laboratory measurements: modulation transfer function (MTF), resolution for high and low contrast targets, homogeneity of spectral transmission and distortion. Geometric accuracy is illustrated by results of test flights performed by Leica with very large image scale (1:2 500, flying height 380 m and 760 m). Even for longest exposure times (1/100 s) and intentionally disturbed aircraft stability in pitch, roll and yaw, the small residuals on control points (East and North + 1.5 cm, height + 3 cm) confirm the theoretical expectations. The dramatic improvement of system quality is obtained at full aperture f:4. RÉSUMÉ: Il est développé le lien en qualité d'image entre la résolution de nouveaux objectifs pour chambre aérienne Leica RC30 avec compensation du filé d'image et nouvelle suspension gyro-stabilisée PAV30. Une rétrospective illustre le progrés en réduction de distorsion et accroissement de résolution des objectifs Wild / Leica f= 153 mm et f= 303 mm durant les trois dernières décennies. Une évaluation théorique montre l’amélioration en résolution par compensation du filé d’image suite par déplacement de l'avion et rota- tions de la chambre aérienne, en particulier pour les grandes échelles. Les paramètres déterminant qualité image et géométrie sont quantifiés pour les nouveaux objectifs 15/4 UAG-S et 30/4 NAT-S: transfert de contraste (MTF), résolution pour mires fort et faible contraste, homogénéité de transmission spectrale, distorsion. Finalement, la précision géométrique est documentée par des vols à très grande échelle (1:2 500, hauteur de vol 380 m et 760 m) effectués par Leica. Même avec temps d'obturation maximal (1/100 s) et déstabilisation intentionnelle de l'avion en roulis / tangage / lacet, les faibles résidus sur les points de contrôle (Est et Nord +1.5 cm, altitude +3 cm) confirment les pronostics théoriques. Un accroissement considérable de qualité du système est obtenue déjà à pleine ouverture f:4. INTRODUCTION Weighted Average Resolution‘) in linepairs / mm for the optimal aperture f:4 or f:5.6 (older lenses max. f:5.6). In the last decade the increasing demand for both large scale aerial surveys and economic high-altitude photography with highest image quality led to extremely stringent specifications for nearly all links in the quality chain of aerial camera systems. New technologies used in the Leica RC30 Aerial Camera System now make it possible to profit from the higher image quality of a new lens generation. EVOLUTION OF DISTORTION AND RESOLUTION OF LEICA AERIAL CAMERAS Figure 1 illustrates the progress in resolution and distortion of the standard wide-angle lens cone f=153 mm (6“) and the narrow- angle f=303 mm (12*). The latter being the lens mostly dedicated to large-scale photography. The maximum distortion is given for the maximum lens aperture, the AWAR resolution („Area 176 All values are related to high-contrast targets (contrast 100:1 or log k = 2) imaged in the image frame of the lens cone by collimators spaced at 5°. The typical high-resolution film for high-altitude survey flights Kodak Panatomic-X 2412, also used for the lens Calibration Certificate, has been taken as a reference. At £4, the mean AWAR for Panatomic-X at high contrast exceeds clearly 120 Lp/mm for the new generation lens 15/4UAG-S and 105 Lp/mm for the 30/4NAT-S type. AWAR values of the same magnitude have also been obtained when calibrating the 15/4UAG-S on the multicollimator of the U.S. Geological Survey (USGS), which included the use of other test parameters such as the emulsion type (Spectroscopic V-F) and the size gradation of the test targets. International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996 arme A kl A Sg SE aa À Ge BMacnlntinn AW ANDR (I n/mm?! Int and mar and imp one wer had han emi whi tim:

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