Search results for "Infrared image"
showing 2 items of 2 documents
A principal component analysis based method for the Simulation of turbulence-degraded infrared image sequence
1999
Une methode originale de simulation d’images degradees par la turbulence atmospherique est presentee. Les methodes existantes ne permettent de simuler que des images temporellement decorrelees les unes des autres, dans le cas de l ’isoplanetisme ou du faible anisoplanetisme. Dans cet article, une simulation pour le cas de fort anisoplanetisme est proposee et une etude sur l’aspect temporel du phenomene dans le but de construire une sequence d’images degradees, a l’aide de l’analyse en composantes principales est faite. Les images obtenues montrent clairement les effets de lanisoplanetisme et l’evolution temporelle de la turbulence.
Infrared image processing and its application to forest fire surveillance
2007
This paper describes an scheme for automatic forest surveillance. A complete system for forest fire detection is firstly presented although we focus on infrared image processing. The proposed scheme based on infrared image processing performs early detection of any fire threat. With the aim of determining the presence or absence of fire, the proposed algorithms performs the fusion of different detectors which exploit different expected characteristics of a real fire, like persistence and increase. Theoretical results and practical simulations are presented to corroborate the control of the system related with probability of false alarm (PFA). Probability of detection (PD) dependence on sign…