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Digital watermarking is the technique used to embed author's credentials, logo or some other information into digital images which can be used in authentications for courtroom evidence, copyright claims and other applications. The objective of this work is to develop a feasible and invisible watermark embedding hardware for the secure digital cameras using LeGall 5/3 (Discrete Wavelet Transform) DWT...
A novel blind watermarking technique based on QR decomposition in still images is proposed. The method is implemented in wavelet domain and its robustness has been evaluated against some image processing attacks and the results have been compared with two traditional methods i.e., SVD and DCT. It is shown that while the proposed scheme has low computational complexity, it has better robustness against...
The advent of the 3G communications era has led to a trend of digital media information being transmitted through wireless network. The variability and high error rate of the wireless communications environment often cause loss of information. Images transmitted in a noisy channel environment tend to be obstructed by unexpected information, which decreases the quality of the image. Therefore, it is...
In this paper, we proposed a blind watermarking technique to protect the video copyright and integrity by embedding both the robust and the fragile watermarks in H.264 video during video encoding. The proposed robust watermarks are embedded on some specific quantized DCT coefficients of intra-frame residue to keep the video copyright as those selected coefficients are strong enough to against the...
Intense work has been reported in the last decade for person's recognition using palmprint biometric patterns. However, there has been a little interest in the security of palmprint recognition systems. This paper introduces a new blind watermarking technique to address the vulnerabilities of a palmprint recognition system against replay attacks. In particular, we focus on protecting the system against...
In this paper, a novel blind watermarking technique based on quantization is proposed. Quantization is performed in a special domain which converts one dimensional signal to a 2-D one named Point to Point Graph (PPG). Basis of the method is on the separation of this domain into two portions; while, only one portion is quantized. Furthermore, in the dewatermarking procedure, by using the unquantized...
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