An Effective Image Watermarking Using Weighted Median Prediction

Now a days developing digital technology and security of digital data becomes a serious problem. Digital watermarking technique provide an effective security protection to digital data. Watermarking is recognizable an embedded image or pattern in a paper, people can observe it by transmitted or reflected light. It is often used as security features of banknotes, passports, postage stamps and other documents. Similarly, digital watermarking means embedding information in a digital signal. It is mainly used to verify the digital signals to authenticity or identity of its owners. Common contents of digital watermarking are audio, picture, or video. This proposed project discusses the basic concept of watermarking grayscale images using weighted median prediction operation. This mechanism will have minimum computation complexity. In this VLSI based data hiding process the secret digital signature is hidden in the host image. Performance will be increased. Along with that the PSNR value and PAYLOAD value increases.