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Title:
METHOD AND DEVICE FOR EMBEDDING INFORMATION IN IMAGE
Document Type and Number:
WIPO Patent Application WO/2020/093769
Kind Code:
A1
Abstract:
Embodiments of the present application disclose a method and device for embedding information in an image. A specific embodiment of the method comprises: using a first transformation matrix to convert a space domain data matrix of a screenshot into an original frequency domain coefficient matrix; performing primary rounding, quantification, and secondary rounding on the original frequency domain coefficient matrix so as to acquire an intermediate frequency domain coefficient matrix, wherein an integer part of source data is maintained and a decimal part of the source data is removed during the primary rounding and the secondary rounding, respectively; embedding, in a direct current coefficient of the intermediate frequency domain coefficient matrix, information to be embedded so as to acquire a frequency domain coefficient matrix having embedded information; using a second transformation matrix to convert the frequency domain coefficient matrix having the embedded information into a space domain data matrix having the embedded information; and generating, on the basis of the space domain data matrix having the embedded information, an image having the embedded information. The embodiment ensures that information embedded in an image is valid and stable.

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Inventors:
HAN SHENGHUI (CN)
Application Number:
PCT/CN2019/103578
Publication Date:
May 14, 2020
Filing Date:
August 30, 2019
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Assignee:
JINGDONG DIGITS TECH HOLDING CO LTD (CN)
International Classes:
H04N19/46
Foreign References:
CN104021516A2014-09-03
CN102547297A2012-07-04
CN106648424A2017-05-10
CN103366336A2013-10-23
US20050074139A12005-04-07
Other References:
WANG XIANGZANG ET AL: "A novel image watermarking algorithm in DCT domain", NATURAL SCIENCE EDITION, vol. 28, no. 1, 31 March 2005 (2005-03-31), XP009520993, ISSN: 1000-1735
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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