Patent ID: 7809182

Claim:
A method for suppressing electromagnetic background radiation in a defined spectral range relative to a signal to be detected, comprising: recording electromagnetic radiation of: at least one uni-dimensional or multidimensional P-image in the defined spectral range (P), and at least one uni-dimensional or multidimensional N-image in at least one further defined spectral range differing from that of the at least one uni-dimensional or multidimensional P-image; and performing signal and information processing on the at least one uni-dimensional or multidimensional P-image and on the at least one uni-dimensional or multidimensional N-image, wherein an image brightness S sp of the background radiation in the P-image is deduced on the basis of a physical model of the spectral distribution of the background radiation or a spectral curve which is directly measured, the signal to be detected is extracted based on the at least one uni-dimensional or multidimensional P-image and the at least one uni-dimensional or multidimensional N-image, the spectral ranges of the at least one uni-dimensional or multidimensional P-image and of the at least one uni-dimensional or multidimensional N-image are determined as a two-band neighbourhood method by a choice of a wavelength band in each case for the at least one uni-dimensional or multidimensional P-image and the at least one uni-dimensional or multidimensional N-image, the wavelength band of the at least one uni-dimensional or multidimensional N-image is either on a short-wave or on a long wave side of the wavelength band of the at least one uni-dimensional or multidimensional P image, wherein the number of dimensions of the at least one uni-dimensional or multidimensional P-image and the at least one uni-dimensional or multidimensional N-image are the same.