Optical monitoring of a two-substance structured area with nonmatrix detectors.

In this paper, we describe a novel concept, to the best of our knowledge, to monitor changes in the landscape with two arbitrarily distributed substances. To record signals from the mock-up scene, nonmatrix detectors are used, which work in the linear sensitivity range. The formulas that describe the parameters of distributed substances are derived. They allow one to find distribution centers of the two substances, drift and drift speed of the centers, radial standard deviations and their changing rates, and areas of each substance. The technique has been applied to monitor remotely the mock-up scene, which imitates the landscape of vegetation restoration after a fire. (C) 2020 Optical Society of America