ABSTRACT
This chapter introduces the different concepts in remote sensing, with emphasis on the differences and complementarity of multiple sensors. Furthermore, remote sensing image fusion is defined in the context of data fusion. The chapter proceeds to provide a definition of remote sensing image fusion and describes the types of imagery commonly fused. This chapter also explains the purpose and objective of image fusion, and lists some of the main benefits and limitations of remote sensing image fusion. The main factors that need to be taken into account when fusing different types of remote sensing imagery are also introduced. A special role is given to active and passive remote sensing but also other types of sensors, such as thermal, hyperspectral, and light detection and ranging, are explained.
