篇名 |
An Improved Steganographic Method Based on Least-Significant-Bit Substitution and Modulus Pixel-Value Difference
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並列篇名 | An Improved Steganographic Method Based on Least-Significant-Bit Substitution and Modulus Pixel-Value Difference |
作者 | Hsing-Han Liu、Yu-Fen Lo |
英文摘要 | An image-domain steganographic method based on a least-significant-bit (LSB) substitution and modulus pixel-value differencing (MPVD) is proposed to hide data in greyscale images. This is a modification of the hybrid LSB/PVD (HLSB/PVD) method proposed by Jung [1]. The cover image is first partitioned into 3 × 3 sized blocks, followed by 5-bit LSB substitution on the central (base) pixel. The differences between the remaining and base pixel values are then computed. HLSB/PVD is applied, with the LSB method used to divide the pixels into higher and lower bits. Data embedding in the lower and higher bits is conducted using 2-bit LSB substitution and MPVD, respectively, leading to a high embedding capacity while retaining an adequate quality in a stego image. Embedding experiments conducted with Lena, Baboon, Goldhill, Boat, House, Airplane, Tiffany, and Peppers showed a mean embedding capacity of 1,087,274 bits, (3.46% higher than that of the HLSB/PVD method). At an embedding rate of 4.14 bpp, the peak signal-to-noise ratio of our method is 31.98 dB. Our method improves the embedding capacity and maintains the imperceptibility. |
起訖頁 | 1609-1620 |
關鍵詞 | Data hiding、LSB substitution、Pixel-value differencing |
刊名 | 網際網路技術學刊 |
期數 | 202112 (22:7期) |
出版單位 | 台灣學術網路管理委員會 |
DOI |
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