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:
Mar. 27, 2001
Filed:
Oct. 17, 1997
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A letterbox image detection apparatus for detecting a letterbox image by detecting a boundary of an image area and a non-image area, so as to display the image area on a full screen according to the detection result but not to display the non-image area. The apparatus includes timing pulse generator for generating a timing pulse for splitting one screen image into N columns (N is an integer of 2 or more), image property calculator for calculating the image property of the N horizontal sections (hereinafter referred to as columns) split by the timing pulse generator, inter-line difference calculator for calculating the inter-line difference of the N image properties, edge detector for comparing the inter-line difference with a predetermined upper first threshold th,and for detecting the edge, and edge position data holder for holding the vertical position data of the in-column edge detected by the edge determinator.