Abstract

Sensing is ubiquitous in multitudinous applications that include biosensing, chemical sensing, surface acoustic wave sensing, sensing coupled with actuation in control, and imaging sensors. This article will be concerned primarily with multispectral sensing that spans acquisition, processing, and classification of data from multiple images of the same scene at several spectral regions. The topic of concern here finds usage in surveillance, health care, urban planning, ecological monitoring, geophysical exploration and agricultural assessment. The field of sensing has experienced a remarkable period of progress that necessitated the launching of an IEEE journal devoted exclusively to that topic in June 2001.