Abstract: A signal processor for use with an imaging sensor system that provides enhanced video imagery. The signal processor may be coupled to a FLIR system, for example, which comprises a plurality of detectors that are scanned across an image scene and reference temperature source during separate portions of each scan cycle. The signal processor comprises an input processor coupled to the imaging sensor system which processes analog signals derived from each of the plurality of detectors. The input processor normalizes the analog signals relative to one another during the active portion of the scan cycle based upon stored data derived from a predetermined sensor responsivity calibration procedure. This normalization function equalizes the gains associated with all channels of the sensor system. The input processor also restores the DC levels of each of the sensor channels to respective DC values related to the reference temperature source during the inactive portion of the scan cycle.

Abstract: A symbol smoothing system for synthetically increasing the effective resolution of an in-raster symbol generator memory by a factor of four. The system stores a special three bit code in selected memory elements representative of the existing and past two memory lines with the code actually being a video brightness distribution and positioning offset code. A code number in a single memory cell defines positional and intensity information for the display elements corresponding to that memory cell and to selected surrounding eight memory cells, all of the memory cells having time or positional correspondence to display element positions. The stored codes in the surrounding memory cells, as well as the instantaneous memory cell being decoded, provide intensity levels which are combined at selected display element positions.

Abstract: A digital scan converter which comprises modular video processing units and modular memory and output units is adapted for processing applied sensor data of various formats so as to provide output data suitable for display on a common indicator. Parameters for processing operations, such as analog-to-digital converting, integrating and detecting, are implemented by the video processing modules in response to digital "set-up" and address words applied from a programmed microprocessor controller. The storage and readout format of the memory and output modules is also controlled by "set-up" and address words applied from the programmed controller.