METHODS FOR ADAPTIVE SPECTRAL, SPATIAL AND TEMPORAL SENSING FOR IMAGING APPLICATIONS

摘要

A method for adaptive spectral sensing developed for a two-dimensional image (16) made up of picture elements (14). The method calls for illuminating at least one of the picture elements with an input light (18) and deriving a time-varying spectral signal from the input light for that picture element. The time-varying spectral signal is processed with a time-varying reference signal by using a mathematical function such as convolution, multiplication, averaging, integrating, forming an inner product, match filtering, addition, subtraction or division to obtain a processed output value for the picture element and this output value is then used in determining a spectral characteristic of the input light. The time-varying spectral signal is conveniently derived by optical filtering of the input light yielding an optical time-varying spectral signal. This method can be used by itself or in combination with at least one other adaptive technique such as adaptive spatial sensing and/or adaptive temporal sensing.