A Survey: Digital Image Watermarking Techniques

Abstract

Multimedia security is extremely significant concern for the internet technology because of the ease of the duplication, distribution and manipulation of the multimedia data. The digital watermarking is a field of information hiding which hide the crucial information in the original data for protection illegal duplication and distribution of multimedia data. This paper presents a survey on the existing digital image watermarking techniques. The results of various digital image watermarking techniques have been compared on the basis of outputs. In the digital watermarking the secret information are implanted into the original data for protecting the ownership rights of the multimedia data. The image watermarking techniques may divide on the basis of domain like spatial domain or transform domain or on the basis of wavelets. The spatial domain techniques directly work on the pixels and the frequency domain works on the transform coefficients of the image. This survey elaborates the most important methods of spatial domain and transform domain and focuses the merits and demerits of these techniques.

Robust watermarking technique using back propagation neural network: a security protection mechanism for social applications

“…LL2, LH2, HL2 and HH2 and LL2 can be further decomposed into LL3, LH3, HL3 and HH3 until the signal is fully decomposed (Kashyap and Sinha, 2012;Kaur and Jindal, 2013;Ganic and Eskicioglu, 2004). The coefficients obtained by applying DWT to host image (H) are (Parashar and Singh, 2014):…”

“…In transform domain watermarking such as discrete cosine transform (DCT), discrete wavelet transform (DWT), discrete Fourier transform (DFT) and singular value decomposition (SVD) (Parashar and Singh, 2014;Ahmidi and Safabakhsh, 2004;Ahmed et al, 2009), cover image is converted into transform domain and then watermark is embedded into transformed coefficients. The important characteristics of the watermarks are robustness, imperceptibility, capacity, computational cost and security (Singh and Chadha, 2013).…”

A Digital Image Watermarking System: An Application of Dual Layer Watermarking Technique

“…This method is easy to implement but it is not very robust against attack which means the watermark may be destroyed. The watermarking is done by choosing a subset of image pixels and substituting the LSB of each of the chosen pixels with watermark bits [10].…”

Analysis of Visible and Invisible Image Watermarking – A Review

“…Preeti Parashar [13] et al, now a days mostly data travels over the internet for the purpose of communication. Thus the security of digital data is the main concern.…”