Ms. Swathi Tandra Profile

Swathi Tandra

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Proceedings Article | 26 February 2008 Paper

Robust edge-detection algorithm for runway edge detection

Swathi Tandra, Zia-ur Rahman

Proceedings Volume 6813, 68130L (2008) https://doi.org/10.1117/12.766643

KEYWORDS: Image enhancement, Edge detection, Visibility, Visibility through fog, Sensors, Detection and tracking algorithms, Fiber optic gyroscopes, Light sources and illumination, Hough transforms, Image processing

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Fog and other poor visibility conditions hamper the visibility of runway surfaces and any obstacles present on the runway, potentially creating a situation where a pilot may not be able to safely land the aircraft. Assisting the pilot to land the aircraft safely in such conditions is an active area of research. We are investigating a method that combines non-linear image enhancement with classification of runway edges to detect objects on the runway. The image is segmented into runaway and non-runway regions, and objects that are found in the runway regions are deemed to constitute potential hazards. For runway edge classification, we make use of the long, continuous edges in the image stream. This paper describes a new method for edge-detection that is robust to the imaging conditions under which we are acquiring the imagery. This edge-detection method extracts edges using a locally adaptive threshold for the detection. The proposed algorithm is evaluated qualitatively and quantitatively on different types of images, especially acquired under poor visibility conditions. Additionally the results of our new algorithm are compared with other, more conventional edge detectors.

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