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:
Nov. 29, 1988
Filed:
Oct. 28, 1986
Hiroshi Ochi, Yokosuka, JP;
Makoto Kobayashi, Yokosuka, JP;
Hisashi Ibaraki, Kanagawa, JP;
Tetsuji Yamamoto, Kanagawa, JP;
Nippon Telegraph and Telephone Corp., Tokyo, JP;
Abstract
A coding method includes the steps of dividing an image into a plurality of blocks each consisting of a plurality of picture elements, dividing gray scale information of each intrablock picture element into three components, i.e, (1) a reference level representing a position of a signal level of an intrablock picture element in a whole dynamic range of gray scale representation, (2) a level difference representing a distribution range of the signal levels of the intrablock picture elements, and (3) a level designating signal representing a level of each intrablock picture element within the distribution range, and independently coding the three components.