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:
Oct. 02, 1979
Filed:
Jun. 06, 1978
Fred G Benkley, Lexington, MA (US);
Gerhard O Sauermann, Lexington, MA (US);
Abstract
A low contrast measurement apparatus for electronically measuring video signal modulation under low contrast scene conditions. The measurement apparatus utilizes a low contrast periodic optical bar chart in conjunction with a filter-integrator processor to measure very low contrast ratios. The filter-integrator processor contains a filter which is tuned to the corresponding fundamental frequency of the bar chart, thereby reducing the noise bandwidth and consequently improving the signal-to-noise ratio. The filtered signal is integrated over one whole picture frame which results in an improved signal to noise ratio. The integrated output of the filtered video signal constitutes a linearly increasing ramp with a period equal to the frame time and whose height is proportional to the amplitude of the periodic signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile