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효과적인 가역 정보은닉을 위한 픽셀의 차이 값을 이용한 개선된 보간법
김평한,정기현,윤은준,유관우,Kim, Pyung Han,Jung, Ki Hyun,Yoon, Eun-Jun,Ryu, Kwan-Woo 한국멀티미디어학회 2021 멀티미디어학회논문지 Vol.24 No.6
The reversible data hiding technique safely transmits secret data to the recipient from malicious attacks by third parties. In addition, this technique can completely restore the image used as a transmission medium for secret data. The reversible data hiding schemes have been proposed in various forms, and recently, the reversible data hiding schemes based on interpolation are actively researching. The reversible data hiding scheme based on the interpolation method expands the original image into the cover image and embed secret data. However, the existing interpolation-based reversible data hiding schemes did not embed secret data during the interpolation process. To improve this problem, this paper proposes embedding the first secret data during the image interpolation process and embedding the second secret data into the interpolated cover image. In the embedding process, the original image is divided into blocks without duplicates, and the maximum and minimum values are determined within each block. Three way searching based on the maximum value and two way searching based on the minimum value are performed. And, image interpolation is performed while embedding the first secret data using the PVD scheme. A stego image is created by embedding the second secret data using the maximum difference value and log function in the interpolated cover image. As a result, the proposed scheme embeds secret data twice. In particular, it is possible to embed secret data even during the interpolation process of an image that did not previously embed secret data. Experimental results show that the proposed scheme can transmit more secret data to the receiver while maintaining the image quality similar to other interpolation-based reversible data hiding schemes.
이중 이미지 기반의 개선된 가역 정보 은닉 기법에 대한 연구
김평한(Pyung-Han Kim),Rosemary Koikara,윤은준(Eun-Jun Yoon),유기영(Kee-Young Yoo) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
In this paper, we propose a dual-image-based reversible data hiding scheme to improve Lu et al.‘s scheme. Lu et al.’s scheme increase the embedding capacity based on dual-image and it has low image distortion by using CFS(Center Folding Strategy). However, their scheme has a problem because the simplicity of process in embedding and extraction. In order to overcome the problem, we propose an improved scheme by utilizing ceil function and floor function by turns.
컬러 이미지와 이중 이미지 기법을 이용하는 가역 정보은닉 기법
김평한(Pyung-Han Kim),윤은준(Eun-Jun Yoon),유관우(Kwan-Woo Ryu),유기영(Kee-Young Yoo) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6
In this paper, we propose a dual image based reversible data hiding scheme using color image. Dual image based reversible data hiding scheme is proposed for high embedding capacity of secret data. We decompose the color image into R,G and B and apply a technique such as Lu et al."s scheme. Lu et al. proposed a reversible data hiding scheme using CFS (Center Folding Strategy) method based on dual images for low image distortion. Experimental results show that the proposed method embeds 624,235 bits more than Lee et al."s scheme and embeds 335,125 bits more than Lu et al."s scheme.
비밀자료 삽입용량을 증가시키기 위한 비밀 공유 기반의 이중 이미지 가역 정보은닉 기법
김평한,유관우,Kim, Pyung Han,Ryu, Kwan-Woo 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.9
The dual image-based reversible data hiding scheme embeds secret data into two images to increase the embedding capacity of secret data. The dual image-based reversible data hiding scheme can transmit a lot of secret data. Therefore, various schemes have been proposed until recently. In 2021, Chen and Hong proposed a dual image-based reversible data hiding scheme that embeds a large amount of secret data using a reference matrix, secret data, and bit values. However, in this paper, more secret data can be embedded than Chen and Hong's scheme. To achieve this goal, the proposed scheme generates polynomials and shared values using secret sharing scheme, and embeds secret data using reference matrix and septenary number, and random value. Experimental results show that the proposed scheme can transmit more secret data to the receiver while maintaining the image quality similar to other dual image-based reversible data hiding schemes.
비밀 공유 기반의 7×7 스도쿠를 사용한 가역 정보 은닉 기법
김영주,김평한,유기영,Kim, Young-Ju,Kim, Pyung-Han,Yoo, Kee-Young 한국멀티미디어학회 2017 멀티미디어학회논문지 Vol.20 No.2
Data hiding is a way to hide the information in multimedia media such as images or video. The scheme proposed by Nguyen and Chang, was able to embed, extract, and restore the cover image and the secret data using Sudoku. But in the extracting phase, the occurrence of duplicate values in the reference matrix was found to decrease the embedding capacity of secret data. This paper has proposed a reversible data hiding scheme while maintaining the quality of the image to provide high embedding capacity using $7{\times}7$ Sudoku and Shamir's secret sharing scheme.