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:
Sep. 18, 1979
Filed:
Apr. 17, 1978
Jan T Freier, Minneapolis, MN (US);
Ronald B Harvey, Minneapolis, MN (US);
John Pone, Jr, Minneapolis, MN (US);
Pako Corporation, Minneapolis, MN (US);
Abstract
An automatic system for classifying photographic negatives containing snow or beach scenes measures the red, green, and blue densities of the negative to be printed. Signals indicative of red, green, and blue exposure times are derived from these measured densities, and the signal indicative of the blue exposure time is compared to the signals indicative of the red and green exposure times. The results of this comparison indicate whether a snow or beach scene is present. To determine the amount of density correction, if any, the densities of the negative at a plurality of points are measured. The extent of the density correction is determined by the number of points whose density is within a predetermined interval of the maximum density measured from any one of the points.