可授權專利


資料隱寫編碼系統及資料隱寫解碼系統
 Encoding method for generating a data-bearing halftone image, and decoding method for decoding the data-bearing image


專利名稱 / Patent Title 資料隱寫編碼系統及資料隱寫解碼系統
Encoding method for generating a data-bearing halftone image, and decoding method for decoding the data-bearing image
專利國家 / Country
   專利證書號 / Registration Number
美國 / US US9,344,600B2
專利權人 / Applicant 國立臺北科技大學 / National Taipei University of Technology
發明人 / Inventor 陳永耀/ Yung-Yao Chen, 林顯易/ Hsien-I Lin, 陳楷文/ Kai-Wen Chen

專利詳細說明
Patent Details

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技術摘要 / Abstract


一種資料隱寫編碼系統,其根據一包含m個臨界值的臨界值矩陣,將一灰階影像轉換成一半色調影像,並根據該臨界值矩陣所對應的一第一墨點成長序列,從該半色調影像中選出可供編碼的至少一個可編碼單元,其中該第一墨點成長序列包含m個墨點形狀,且該可編碼單元的墨點形狀與該m個墨點形狀其中之一相同,並且預備2n個不同的第二墨點成長序列,各該第二墨點成長序列包含m個墨點形狀,其中n≧1,再從該等第二墨點成長序列中的2n個墨點形狀中選出一個取代該可編碼單元,且該被選出的墨點形狀與2n個二元碼其中之一對應,藉此產生一編碼後半色調影像。
An encoding system is for generating a data-bearing halftone image. The encoding system is configured to: convert a grayscale image into a halftone image having a plurality of image cells; select, from the halftone image, at least one of the image cells to be a carrier cell according to a set of reference dot patterns, the carrier cell having a dot pattern identical to one of the reference dot patterns; and generate a data-bearing halftone image by replacing the dot pattern of the carrier cell by a specified one of multiple encoding dot patterns of one of a plurality of the sets of encoding dot patterns each being associated with a code. The data-bearing halftone image is encoded with a code associated with the one of the sets of the encoding dot patterns.


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