Bispectral analysis

For the bispectral analysis speckle imaging method, see speckle masking.

Bispectral analysis describes observations made at two wavelengths. It is often used by scientists to analyze elemental make up of a planetary atmosphere by analyzing the amount of light reflected and received through various color filters. By combining and removing two filters, much can be gleaned from only two filters. Through modern computerized interpolation, a third virtual filter can be created to recreate true color photographs that, while not particularly useful for scientific analysis, are popular for public display in textbooks and fund raising campaigns.

The bispectrum is a statistic used to search for evidence of nonlinear interactions in signals.

A form of bispectral analysis called the bispectral index is applied to EEG waveforms to monitor depth of anaesthesia.