Unmixing for detection and quantification of adjacency effects

The adjacency effect is a well-known phenomenon of creating path interferences between the reflectances from different ground-cover materials. The effect is caused by atmospheric scattering, hence a typical approach to its detection has been the modeling of radiation transfer and spectral correspondence at particular wavelengths. In this paper, we investigate the detection of adjacency effect as being a general unmixing problem. This means that we opt to use unmixing to separate the true signature of a pixel from the background scatter reflected from its large neighborhood. Here, we concentrate on the prevalent linear mixing, and compare this with a specialized approach for detecting the adjacency effect in turbid waters surrounded by vegetation.