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2011 Seventh International Conference on Intelligent Information Hiding and Multimedia Signal Processing
Genetic Algorithm-Backpropagation Network Hybrid Architecture for Grayscale Image Watermarking in DCT Domain
Dalian, China
October 14-October 16
ISBN: 978-0-7695-4517-2
In this paper, Human Visual System (HVS) characteristics are modeled using a Genetic Algorithm (GA) based technique for the determination of weights in a BPN (GA/BPN) for the purpose of image watermarking. The GA based BP network is trained by 27 inference rules comprising of three input HVS features namely luminance sensitivity, edge sensitivity computed using threshold and contrast sensitivity computed using variance. The GA / BP network block wise produces a single output weighting factor which is used to embed two different watermarks -- (a) a sequence of normalized random numbers and (b) a binary image, with in the host image in the transform (DCT) domain. The high computed value of PSNR parameter indicates that the signed image has good perceptible quality. The watermark is extracted from the signed image using Cox's algorithm. The embedded and extracted watermarks are compared and SIM(X, X^* ) correlation parameter is computed.
Index Terms:
Human Visual System, GA based BPN, Luminance Sensitivity, Edge Sensitivity, Contrast Sensitivity, Similarity Correlation Parameter
Citation:
Charu Agarwal, Anurag Mishra, Arpita Sharma, "Genetic Algorithm-Backpropagation Network Hybrid Architecture for Grayscale Image Watermarking in DCT Domain," iih-msp, pp.177-180, 2011 Seventh International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 2011
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