We present methods and results to calibrate the new oblique sensor UltraCam Osprey which was presented for the first time at the ASPRS 2013 conference and exhibition in Baltimore, MD, March 2013. Even if this was not the first time when oblique sensors were introduced into the market, the UltraCam Osprey did show several new conceptual details which are illustrated in this presentation. The design of the camera is focusing on two important characteristics, a metric nadir component which has been derived from the UltraCam Lp sensor, and collection efficiency through very large swath width. The nadir sensor consists of the 90 megapixel panchromatic camera, true-color RGB, and a near-infrared camera. Adding six oblique camera heads, with two each in forward and backwards direction, results in unmatched oblique collection efficiency. We first explain the camera and cone configuration along with the geometric layout of the sensor system. Then we describe the laboratory setup for geometric calibration of the UltraCam Osprey and the calibration process along with the actual results of one such calibration showing sub-pixel accurate image geometry. This proves that the UltraCam Osprey is a fully calibrated metric camera system suitable for photogrammetric survey applications.
ABSTRACT:Wide area and thus continental mapping extending beyond national borders is a novel concept in civilian photogrammetry. The Microsoft Global Ortho Program was launched in the Spring of 2009 as a result of Microsoft's need for global geo-data at a high geometric resolution and radiometric excellence. By fall of 2012 more than 10 million km 2 of the USA and 14 European countries will have been covered by seamless 30 cm GSD color-, 60 cm GSD false-color infrared ortho-mosaics and a 1 meter GSD digital surface model. The ortho-maps are being published to Microsoft's Bing Maps Internet mapping portal.The Global Ortho Program was designed for highly and unprecedented automated mapping of essentially entire continents. In 2011, exclusive of flight operations, the product output per person has been measured in excess of 275,000 square km per year. We describe research efforts that made this achievement possible. Those include a specially designed aerial sensor (Ultracam G), logistics simulation for fight planning and optimization, in-flight blur detection and subsequent automatic blur removal, modeling and removal of atmospheric and environmental conditions, automated shear detection and DTM refinement, an IT architecture to process > 200,000 aerial images/day, and for creating over 1,000,000 km 2 ortho-imagery and DSM data in 24 hours.While addressing these issues, we provide ideas how this might affect the future of spatial infrastructure initiatives.
No abstract
The importance of digital images has increased and the need for hard-and software tools for creating, archiving and managing digital images as well for image manipulation and image mensuration. The XLTT software (Expandable Light Tablet Tool) is designed to access medium sized digital images (usually 10 to 50 Megapixels each) and allow image coordinate mensuration with subpixel accuracy. Great efforts were spent on the design of the graphical user interface, which gives access to multiple images at a time and allows simultaneous coordinate mensuration of identical points. XLTT is modeled as a digitizer for convenient image mensuration. Additional functions, like image enhancement, geometric transformation of images, stereo mensuration of image pairs and image correlation are also available. XLTT was developed using IDL® and C and is implemented on Silicon Graphics Workstations. KurztassungIn den Ietzten Jahren ist die Bedeutung digitaler Bilddaten laufend gewachsen und damit stieg auch der Bedart an adaquaten Werkzeugen aus dem Hard-und Softwarebereich. Diese gestatten es Bilddaten zu erfassen, zu speichern und zu verwalten sowie die Bilder zu bearbeiten, zu verändern oder in den digitalen Bildern zu messen. Die hier vorgestellte Software XLTT (Expandable Light Tablet Tool) folgt einem Konzept, das einerseits die Verwaltung und den Zugriff auf mittelgrol3e Bilddaten (10 -50 Megapixel) erlaubt und andererseits eine Mel3funktion zur Verfugung stellt, mit der Bildkoordinaten mit Subpixelgenauigkeit erlaBt werden kännen. Besonderes Augenmerk liegt auf der Gestaltung der graphischen Benutzeroberfläche, die eine gleichzeitige Bearbeitung mehrerer Bilder erlaubt und so eine simultane Messung identer Punkte gestattet. Als analoges Pendant kann em Digitalisiertablett gesehen werden, das ebenso zur bequemen Messung von Bildkoordinaten verwendet werden kann. Zusätzlich bietet XLTT eine Reihe von Funktionen, wie Bildverbesserung, geometrische Transformationen, Stereomessung von Bildpaaren und Bildkorrelation. XLTT wurde mit IDL® und C entwickelt und vornehmlich auf Silicon GraphiOs Workstations installiert.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.