NDLI: Tightly-coupled image-aided inertial relative navigation using Statistical Predictive Rendering (SPR) techniques and a priori world Models

Content Provider	IEEE Xplore Digital Library
Author	Beich, J. Veth, M.
Copyright Year	2010
Description	Author affiliation: Air Force Institute of Technology, USA (Veth, M.) \|\| Air Force Test Pilot School, USA (Beich, J.)
Abstract	Autonomous navigation in areas where Global Positioning System (GPS) solutions are unavailable continues to be a significant challenge. One example application is the relative targeting and navigation problem for next-generation autonomous vehicles. In this application, refined navigation state information (position, velocity, and attitude) can be determined with the addition of a high-resolution camera to an Inertial Navigation System (INS)-aided navigation system. In the proposed employment scenario, GPS information is not available, the location and structure of a reference landmark is known to a high degree of precision, and the initial navigation states (along with their respective uncertainties) of the vehicle are known to a variable degree of uncertainty. The landmark environment is modeled in advance using commercially available Computer Aided Design (CAD) software and photographs of objects within the scene. This information is intended to be combined with INS data in a statistically-rigorous predictive rendering algorithm to determine error states for implementation in an Unscented Kalman Filter (UKF). The error states are then used to correct the navigation solution. Several methods of exploiting the available information are compared to determine “best performers” in terms of speed, precision, and situational appropriateness. For this research, all methods are based on a proposed Statistical Predictive Rendering (SPR) technique which consists of constructing synthetic views of the scene from the perspective of the vehicle for comparison with actual images from the on-board camera. This predictively-rendered image is then compared to measured images using either feature-based or pixel-based comparison methods which serve to improve the accuracy of the correspondence search technique employed. Vision-aided navigation solutions are an active area of research that incorporates knowledge from the estimation, image processing, and navigation fields of engineering. Past efforts have focused on stochastically constraining feature point correspondence in successive images of the ground from the perspective of an overflying air vehicle using an Extended Kalman Filter (EKF) or UKF, and SPR in the problem of autonomous aerial refueling using an EKF. The proposed algorithm elements are tested using a combination of experimental and simulated data. Currently, the simulated flight profiles show that the navigation solution accuracy and robustness is improved by including SPR-based visual information into the tightly coupled framework. Further experimental tests will be conducted in our laboratory using realistic scenes and in-flight as part of a Test Pilot School project. Conclusions regarding the performance of the tightly-coupled SPR technique will be presented.
Starting Page	552
Ending Page	560
File Size	1149776
Page Count	9
File Format	PDF
ISBN	9781424450367
ISSN	21533598
DOI	10.1109/PLANS.2010.5507309
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Navigation Rendering (computer graphics) Predictive models Global Positioning System Layout Testing Remotely operated vehicles Mobile robots Cameras Uncertainty
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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