ABSTRACT
This chapter use three samples usually used for study cases: the drying of paint over an object of known topography (a coin; see ), a corn seed in the beginning of its germination process, and an image of a bruised apple where the bruise cannot be perceived. This operation can be implemented in real time, and is usually adopted to indicate whether the phenomenon that is investigated is present. The chapter shows some examples of the cited operations in an experiment where an object was covered with a layer of paint and illuminated by laser. When the phenomenon that is looked for is a fast one, requiring a few frames to develop, it is better depicted when the generalized differences are restricted to neighbors or close frames. Briers has proposed and demonstrated a very important method, also intended for in vivo imaging blood perfusion in real time but that could be used for other phenomena exhibiting similar dynamics.
