I. Introduction
Unmanned airborne remote sensing is considered as one of the most efficient methods for safety and security surveillance, with its adoption being continuously increased by many countries. Aerial views can provide better perspectives with the ability to cover large ground inaccessible areas and open seas. The adoption of such technology was mainly due to the fact that manned aircraft missions have been proved not so cost-effective and also potentially unsafe for the operators in extreme weather conditions [1]. On the contrary, Unmanned Aerial Vehicles (UAVs) function and operate at much lower costs with faster response times, providing safer ways for aerial remote surveillance [2].