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:
Dec. 09, 1997
Filed:
Dec. 11, 1995
Eiichi Yamanishi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A histogram preparation circuit prepares a density histogram from image data sent from a scanner. A histogram clear discriminating section detects a white peak of the histogram and a black peak thereof, and compares density of the white peak and that of the black peak with a white side threshold value and a black side threshold value, respectively. When the density of the white peak is the white side rather than the white side threshold value or the density of the black peak is the black side rather than the black side threshold value, it is detected whether or not a sum of the frequencies around the density of the white or black peak is a predetermined value or more. When the sum of the frequencies is the predetermined value or more, a histogram value stored in a histogram preparation circuit is cleared. A histogram is prepared by use of only image data showing the document, so that a suitable automatic density adjustment can be executed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile