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:: THE OPTIMIZATION OF THE STEREO ANGLE OF CCD-LINE-SCANNERS Anko Börner

Document type:: Multivolume work

Structure type:: Chapter

3.2. Influence of ground resolution A few test series with different ground resolutions of the optoelectronic system were carried out. There are two ways to realize it. The first one is to change the flight height, the second one is a change of the field of view with a constant number of pixels per line. Both ways yield the same results. It could be established that the influence of the camera's ground resolution is not as drastic as the influence of the area's elevation dynamic. Consequently it would be better to reduce the data rate of a camera by using macro pixels and not by using a greater compression factor. The blocking effects caused by certain compression algorithms make it harder for the match algo- rithm to find conjugated points, so the number of matched points decreases. The elevation error caused by the lower number of matched points could be much greater than the error caused by a smaller ground resolution of a camera. In general the results of the previous chapter could be established. 3.3. Other aspects Another point to plead for a small stereo angle is that the stereo processing just can be started, when all lines got information about the same area. Consequently the greater the stereo angle the bigger the memory storing the image and position data. In contrast to the simulation we have to take into consider- ation a bi-directional reflectance in reality. The smaller the stereo angle the smaller the differences of images caused by this effect. Maybe a more intelligent and more expensive match algo- rithm is able to match a sufficient number of points even if the stereo angle is large. But actually there is no need for a great stereo angle, because the accuracy to determine a single point's elevation will not be improved. 4. CONCLUSION The main results are: An optimal stereo angle exists and should be between 10 and 40 degrees. The permissible range depends on the elevation dynamics of the observed surface and on the camera's ground resolution. A stereo angle between 15 and 20 degrees leads to a sufficient number of matching points and to a good accuracy of the elevation values under all conditions. These results underline the importance of a suitable simu- lation technique for the design and optimization of camera parameters and observation conditions. 5. REFERENCES Bórner, A., 1995. Optimierung optoelektronischer Sys- teme; Diplomarbeit, Technische Universität Ilmenau Heipke, C., 1994. Digitale photogrammetrische Arbeitssta- tionen - Algorithmen, Design und Bewertung; Habilitations- schrift, Technische Universität München Reulke, N., 1995. Simulation und Optimierung optoelektro- nischer Systeme am Beispiel der Bestimmung von 30 Wolkengeschwindigkeit und -höhe; Dissertation, Tech- nische Universität Berlin Reulke, R., Reulke, N., Jahn, H., 1994. Numerical simula- tion system for the generation of image data from space- borne imaging sensors for planetary exploration; SPIE Vol. 2318, pp. 144-154 U.S. Geological Survey, 1992. Mission to Mars: Digital Topographic Map, Volume 7: Global Topography WAOSS, 1991a. Wide Angle Optoelectronic Stereo Scan- ner (WAOSS), Mars-94 Mission, Phase B Study, WAOSS Science Objectives; Berlin WAOSS, 1991b. Wide Angle Optoelectronic Stereo Scan- ner (WAOSS), Mars-94 Mission, Phase B Study, WAOSS Technical Part; Berlin International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996 Abstı GPS | Statio frame Progr numb The | opera such kinen execu navig Those pecul proce satell Here exper 1. Int The » NAV low s in sig The : condi data throu proce

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