Hyperspectral Imaging for Real-Time Unmanned Aerial Vehicle Maritime Target Detection

• Autor(a) principal: Freitas, Sara Costa
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.22/11154
• topic: Hyperspectral; Real-time; Boresight calibration; Geo-referencing; Pushbroom; Target detection; Unmanned aerial vehicle; Hiperespectral; Tempo-real; Calibração boresight; Geo-referenciação; Deteção de alvos; Veículos aéreos não tripulados; Sistemas Autónomos

The hyperspectral cameras use has been increasing over the past years, driven by the exponential growth of the computational systems power. The capability of acquiring multiple spectre wavelengths benefits the increase of the hyperspectral systems range of applications. However, until now, most hyperspectral systems are used in posprocessing and do not allow to take full advantage of the system capabilities. There is a recent trend to be able to use hyperspectral systems in real-time. Given the recent problems in European Union borders due to irregular immigration and drug smuggling, there is the need to develop novel autonomous surveillance systems that can work on these scenarios. This thesis addresses the scenario of using hyperspectral imaging systems for maritime target detection using unmanned aerial vehicles. Specifically, by working in the creation of a hyperspectral real-time data processing system pipeline. In our work, we develop a boresight calibration method that allows to calibrate the position of the navigation sensor related to the camera imaging sensor, and improve substantially the accuracy of the target geo-reference. We also develop a novel method of distinguish targets (boats) from their dominant background. With this application our system is able to only select relevant information to send to a remote station on the ground, thus making it suitable to be installed in an actual unmanned maritime surveillance system.