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:
Apr. 21, 1987
Filed:
Mar. 25, 1986
Thomas C Nutting, Fairport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A focusing aid for a video camera alleviates manual focusing uncertainty due to difficulty in rendering sharply defined features in an electronic viewfinder. The focusing aid impacts a central viewing area by modifying the picture contrast, a visual substitute for a bandwidth-limited rendition of picture sharpness. A high frequency component of a luminance signal generated by the camera is converted into a dc control signal having an amplitude that varies with high frequency content. By using the control signal to adjust the gain applied to the luminance signal, the contrast of the picture formed in the central area is accentuated according to the degree of focus.