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. 17, 1981
Filed:
Jun. 19, 1978
Applicant:
Inventors:
Noboru Murayama, Tokyo, JP;
Hayashi Taniguchi, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358261 ; 364515 ;
Abstract
Correlation between data in two adjacent scan lines is sensed. When the degree of correlation is above a predetermined value the data is compressed by means of two dimensional compression. When the degree of correlation is below the predetermined value the data is compressed by means of one dimensional compression. Typically, both the one and two dimensional compression systems are based on run length encoding. After a predetermined number of scan lines have been compressed by two dimensional compression, one scan line may be compressed by one dimensional compression to prevent accumulation of error.