The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1996
Filed:
Jan. 17, 1995
Robert W Klatt, Rancho Palos Verdes, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A perceptual delta frame processor for use with a detector array and a noninterlaced video display that produces an image equivalent to that of an image difference processing system. The processor includes a responsivity equalization circuit for processing output signals provided by the detector array that equalize the relative response of its detector elements and provide equalized output signals. A multiplier circuit is provided for inverting the polarity of alternate images to provide constant polarity signals. A contrast control circuit is provided for processing the constant polarity signal to produce optimized video signals that are applied to the noninterlaced video display at a repetition rate above its flicker fusion frequency. Consequently, alternate video frames are averaged by the eye-brain system of an observer, who perceives an image having the quality that is equivalent to an image difference processing system. The present invention provides the benefits of image difference processing, or delta frame processing, without incurring the cost of analog to digital and digital to analog conversion and digital frame storage when it is employed with chopped, thermal detectors such a pyroelectric and bolometer imaging arrays.