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:
Jan. 26, 1988
Filed:
Jan. 08, 1986
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358283 ; 358282 ;
Abstract
A halftone picture processing apparatus has devices for dividing and storing an image signal in the form of blocks each of which consists of a plurality of pixels, for setting at least one path for accessing the pixels in each block, calculating the number of changes in image signals which satisfies predetermined conditions, the changes occurring between succeeding pixels in each block along the path, and detecting a halftone region in accordance with the number of changes in image signals.