Toward omnidirectional and automated imaging system for measuring oceanic whitecap coverage

• Main Authors: Al-Lashi, RS, Webster, M, Gunn, SR, Czerski, H
• Format: Article in Journal/Newspaper
• Language: English
• Published: Optical Society of America 2018
• Subjects: North Atlantic
• Online Access: https://discovery.ucl.ac.uk/id/eprint/10046002/1/Czerski_josaa-35-4-515.pdf; https://discovery.ucl.ac.uk/id/eprint/10046002/

Accurate measurements of the oceanic whitecap coverage from whitecap images are required for better understanding the air–gas transfer and aerosol production processes. However, this is a challenging task because the whitecap patches are formed immediately after the wave breaks and are spread over a wide area. The main challenges in designing a whitecap-imaging instrument are the small field of view of the camera lens, processing large numbers of images, recording data over long time periods, and deployment difficulties in stormy conditions. This paper describes the design of a novel high-resolution optical instrument for imaging oceanic whitecaps and the automated algorithm processing the collected images. The instrument was successfully deployed in 2013 as part of the HiWINGS campaign in the North Atlantic Ocean. The instrument uses a fish-eye camera lens to image the whitecaps in wide angle of view (180°).