Real-time processing of midwave-infrared imaging spectrometer data

A custom six channel digital processing card has been built for the mid-wave infrared spectral imager (MIRSI) for spectrally classifying objects in the 2.9 - 4.9 micron spectral region. The card, called the real time processor, fits in a standard ISA PC slot and operates on the 12 bit data from the MIRSI InSb camera, performing six spectrally weighted sums on each focal plane array row (i.e., spectrum of a spatial pixel). Objects in the scene are classified according to the amplitudes of the weighted sums, where the weighting functions are obtained using a least squares technique. An optional analog interface has been added to the real time processor to allow RS-170 input of HSI data from a video tape or standard video camera output. A preprocessing card is being designed to provide bad pixel substitution and to apply gains and offsets independent to each pixel prior to the spectral classification to provide calibrated data to the real time processor.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.