| Resumo: | Forest fires are an increasingly relevant problem nowadays with the worsening of global warming’s most severe consequences. These fire occurrences, that can cause immense damage to forest ecosystems and have a great negative impact in peoples lives,begin often with rekindles. These problems can be very difficult to tackle, needing to involve a lot of people to surveil the areas at risk. A system capable of executing this surveillance protocol and alerting the fire fighting authorities of fire and possible rekindle occurrences would be extremely beneficial in these scenarios.A system aiming to achieve this goal is being implemented, composed of an UAV equipped with a multispectral camera, capturing aerial images of these areas. This dissertation presents a fire detection model to be used in prescribed fires and rekindling situations, identifying fire instances within the captured images. It makes use of the camera’s various spectral bands to highlight the areas at greatest risk and of deep learning technology to autonomously recognise these areas.
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