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:
Jun. 11, 1985
Filed:
Jun. 15, 1982
Applicant:
Inventor:
Yoshiaki Kanmoto, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358163 ; 358284 ;
Abstract
A device for carrying out the shading correction of an image signal is provided. The present device includes an image sensor capable of scanning a reference density reflecting plate over a predetermined number of times along different scanning lines and averaging means for taking an average among the repeated scannings thereby forming an error-free reference data to be later used in the operation of shading correction.