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. 10, 2017
Filed:
May. 27, 2015
Applicant:
National Taipei University of Technology, Taipei, TW;
Inventors:
Yung-Yao Chen, Taipei, TW;
Kai-Wen Chen, Taipei, TW;
Assignee:
National Taipei University of Technology, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 19/06 (2006.01); H04N 1/405 (2006.01);
U.S. Cl.
CPC ...
H04N 1/4051 (2013.01); G06K 19/06103 (2013.01);
Abstract
An encoding system converts a grayscale image into an original halftone image according to a predetermined threshold matrix, determines carrier cells from the original halftone image according to reference dot patterns having rotationally asymmetric first-tone patterns, converts the carrier cells into encoded cells according to to-be-embedded codes and rotational states of corresponding asymmetric first-tone patterns, and optimizes non-carrier cells and encoded cells using a direct binary search technique to visually approach the grayscale image.