Visual cryptography based on dual image watermarking for copyright protection and security using various transforms
B. Jagadeesh1, K. Leela Sivan Prasad Reddy2

1K. L. Sivan Prasad Reddy*, ECE Department, Gayatri Vidya Parishad College of Engineering (Autonomous), Visakhapatnam, India. 
2B. Jagadeesh, Associate Professor, ECE Department, Gayatri Vidya Parishad College of Engineering (Autonomous), Visakhapatnam, India.
Manuscript received on July 30, 2019. | Revised Manuscript received on August 25, 2019. | Manuscript published on August 30, 2019. | PP: 4154-4160 | Volume-8 Issue-6, August 2019. | Retrieval Number: F9306088619/2019©BEIESP | DOI: 10.35940/ijeat.F9306.088619
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Abstract: In this paper, a novel dual image watermarking method is proposed to provide the copyright protection to digital images. In this proposed method, the lower and higher frequency subbands of the decomposed original image are modified by inserting the watermark information using different transforms. The implementation of a method that combines the visual cryptography with dual image watermarking to provide the security for the digital images during an exchange in open networks. The Arnold transform is used to encrypt the second watermark to employ the secure communication. Based on the proposed, the perceptibility and robustness of the distributed images can be increased. The original and watermarked images look like same and the PSNR and NCC are calculated for analyzing the system performance. This method is more robust and secure than existing methods. 
Keywords: Visual Cryptography, Dual Image Watermarking, Arnold Cat-map, Copyright Protection.