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Signal processor for an imaging sensor system

  • US 5,083,204 A
  • Filed: 10/01/1984
  • Issued: 01/21/1992
  • Est. Priority Date: 10/01/1984
  • Status: Expired due to Term
First Claim
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1. A signal processor for use with an imaging sensor system that comprises a plurality of detectors which are scanned across an image scene during a first portion of a scan cycle and scanned across a reference temperature source during a second portion of said scan cycle, said signal processor providing video output signals to a video monitor which are representative of said image scene, said signal processor comprising:

  • input processor means coupled to said imaging sensor system for processing analog signals derived from each of said plurality of detectors in order to equalize the gains of said analog signals relative to one another another during said first portion of said scan cycle based upon stored gain correction signals derived from a predetermined sensor responsivity calibration procedure, for processing said analog signals in order to restore the DC levels of signals derived from each of said detectors to DC values related to said reference temperature source during said second portion of said scan cycle, and for processing the equalized and DC restored signals to provide digitized first output signals from said input processor means, said input processor means including means for generating automatic responsivity equalization factors and DC restoration values including circuit means for correcting errors in said equalization factors resulting from adjustment of said restoration values and for correcting errors in said restoration values resulting from adjustment of said equalization factors;

    scan converter means coupled to said input processor means for storing digitized first output signals and processing the stored digitized signals to provide digitized second output signals which are compatible with said video monitor; and

    output processor means coupled to said scan converter means for processing said second digitized output signals in a manner which permits software-controlled digitized image enhancement thereof, and for converting the enhanced second digitized output signals into analog video signals compatible with said video monitor.

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