Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kai-Wen Chen0
Yung-Yao Chen0
Date of Patent
January 10, 2017
0Patent Application Number
147226210
Date Filed
May 27, 2015
0Patent Citations Received
Patent Primary Examiner
Patent 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.
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