An Efficient DCT-SVD Steganographic Approach Applied to JPEG Images

Tchakounté, Franklin and Kamdem, Priva Chassem and Kamgang, Jean Claude and Tchapgnouo, Hortense Boudjou and Atemkeng, Marcellin (2020) An Efficient DCT-SVD Steganographic Approach Applied to JPEG Images. EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, 7 (24). p. 166365. ISSN 2410-0218

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To prove the origin of images in social media, this work proposes an efficient JPEG image steganography approach. After structuring the cover image into blocks of 8*8 pixels, Discrete Cosine Transform is applied to each block of pixels. The latter are quantified using a quantization table and a matrix of DC coefficients from quantized blocks of pixels, is obtained. Singular Value Decomposition is applied to the previous matrix and the secret message is inserted within singular vectors. For extraction purposes, previous transformations are followed reversely. An experimentation is made on seven images and results show that the proposed system outperforms similar studies in three aspects (i) it preserves stego image quality with PSNR of stego images varying between 38 and 54 (ii) it is able to insert a secret message of 257600 bits with the capacity of 4 bits per pixel (iii) it is robust and resistant to attacks such as histogram analysis and chi-square test.

Item Type: Article
Uncontrolled Keywords: Image steganography, JPEG, Discrete Cosine Transform, Insertion, Singular Value Decomposition, Quantization, Attacks, Social media
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
QA75 Electronic computers. Computer science
Depositing User: EAI Editor II.
Date Deposited: 21 Jan 2021 06:55
Last Modified: 21 Jan 2021 06:55

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