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. 15, 1997
Filed:
Apr. 21, 1995
Yoshiko Hozumi, Zushi, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A multidimensional multi-valued image compression and decompression method obtains feature points satisfying a specific condition on an equi-luminance line set for each specific luminance value previously determined for an image luminance function, and transmits and records positions and luminance values at the feature points to restore an image. In compression, pixel contours are traced on the equi-luminance line set. Specific equi-luminance line passing point coordinates on the pixel contours are shifted to a central position of each pixel. In decompression, a region where the equi-luminance line on the image is a boundary is divided into a bright and a dark region according to a luminance threshold. The divided regions are filled with bright and dark symbols, respectively, to form a mask representative of the image based on the bright and dark symbols.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile