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公开(公告)号：US10297000B2
公开(公告)日：2019-05-21
申请号：US15807242
申请日：2017-11-08
Applicant: Ningbo University
Inventor： Gangyi Jiang , Yongqiang Bai , Mei Yu , Yang Wang
Abstract: A high dynamic range image information hiding method includes embedding secret information and extracting the secret information. The step of embedding secret information includes obtaining three channel values of every pixel in an original high dynamic range image; according to every channel value and corresponding 5-bit exponent of every pixel, determining an embedding significance bit of the information to be embedded in every channel value of every pixel; embedding information into every channel value of every pixel; and obtaining a high dynamic range image embedded with the secret information. The step of extracting the secret information includes obtaining three channel values of every pixel in the high dynamic range image embedded with the secret information; obtaining an information embedding position of every channel value embedded with the information of every pixel; extracting information from every channel value embedded with the information of every pixel; and obtaining secret information sequences.
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公开(公告)号：US10368051B2
公开(公告)日：2019-07-30
申请号：US15687276
申请日：2017-08-25
Applicant: Ningbo University
Inventor： Gangyi Jiang , Jing Wang , Fen Chen , Yongqiang Bai , Yang Wang
IPC: H04N13/00 , H04N13/161 , H04N13/15 , H04N19/124 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/467 , H04N19/597 , H04N19/136 , H04N19/154 , H04N19/132
Abstract: A 3D-HEVC inter-frame information hiding method based on visual perception includes steps of information embedding and information extraction. In the step of information embedding, the human visual perception characteristic is considered, stereo salient images are obtained by a stereo image salient model, and the stereo salient images are divided into salient blocks and non-salient blocks with an otsu threshold. The coding quantization parameters are modified according to different modulation rules for different regions. Then, based on the modified quantization parameters, the coding-tree-units are coded to complete the information embedding. In the step of information extraction, no original video is needed, no any side information needs to be transmitted, and the secret information can be blindly extracted. The present invention combines with the human visual perception characteristic, and selects P frames and B frames as embedded frames for effectively reducing the decrease of the stereo video subjective quality.
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公开(公告)号：US20180075569A1
公开(公告)日：2018-03-15
申请号：US15807242
申请日：2017-11-08
Applicant: Ningbo University
Inventor： Gangyi Jiang , Yongqiang Bai , Mei Yu , Yang Wang
CPC classification number: G06T1/0021 , G06F21/602 , G06F21/71 , G06K9/46 , G06T1/0028 , G09C5/00
Abstract: A high dynamic range image information hiding method includes embedding secret information and extracting the secret information. The step of embedding secret information includes obtaining three channel values of every pixel in an original high dynamic range image; according to every channel value and corresponding 5-bit exponent of every pixel, determining an embedding significance bit of the information to be embedded in every channel value of every pixel; embedding information into every channel value of every pixel; and obtaining a high dynamic range image embedded with the secret information. The step of extracting the secret information includes obtaining three channel values of every pixel in the high dynamic range image embedded with the secret information; obtaining an information embedding position of every channel value embedded with the information of every pixel; extracting information from every channel value embedded with the information of every pixel; and obtaining secret information sequences.
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公开(公告)号：US20170374347A1
公开(公告)日：2017-12-28
申请号：US15687276
申请日：2017-08-25
Applicant: Ningbo University
Inventor： Gangyi Jiang , Jing Wang , Fen Chen , Yongqiang Bai , Yang Wang
IPC: H04N13/00 , H04N19/467 , H04N19/182 , H04N19/176 , H04N19/172 , H04N19/597 , H04N19/124
CPC classification number: H04N13/161 , H04N13/15 , H04N19/124 , H04N19/132 , H04N19/136 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/467 , H04N19/597
Abstract: A 3D-HEVC inter-frame information hiding method based on visual perception includes steps of information embedding and information extraction. In the step of information embedding, the human visual perception characteristic is considered, stereo salient images are obtained by a stereo image salient model, and the stereo salient images are divided into salient blocks and non-salient blocks with an otsu threshold. The coding quantization parameters are modified according to different modulation rules for different regions. Then, based on the modified quantization parameters, the coding-tree-units are coded to complete the information embedding. In the step of information extraction, no original video is needed, no any side information needs to be transmitted, and the secret information can be blindly extracted. The present invention combines with the human visual perception characteristic, and selects P frames and B frames as embedded frames for effectively reducing the decrease of the stereo video subjective quality.
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