A Grayscale Image Fragile Watermark Authentication System in Spatial-Domain

Abstract:

This study deals with devising and implementing a novel technique for image authentication and secured message transmission based on hiding large volume of data into gray scale images. A grayscale image fragile watermark authentication system in spatial-domain is proposed. First it preprocesses the watermark image and resizes it to a quarter of the size of the original image. Then, it generates a random key matrix K and 128bit message authentication code from the original image. It replaces the 128bit message authentication code for the former 128bit of K to obtain a new key matrix KH. Then, it calculates the embedded position P=KHi xor (b7,b6,b5.b4) i MOD 3. b7,b6,b5,b4 are the high 4 bits of the original images pixel. It embeds the watermark image according to P value to the lower 4 bits of the original images pixel. The system is made in experiment. The result shows the system has good imperceptibility.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 2920-2924
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.2920
• Online since: August 2013
• Authors: Xu Zhan, Yue Rong Lei, Ling Yan Du, Hui Ming Zeng, Jian Ling Chen
• Keywords: Hash, Imperceptibility, Spatial-Domain

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