signalspot.com

Reversible watermark embedding algorithm A basic approach of reversible watermarking is to select an

Abstract
During the last decade, the availability of information in digital form has increased dramatically. Digital media have numerous advantages over analog media, such as higher quality, easy editing, loss less copying, and fast and efficient distribution. These advantages allow for new [...]

Read Full Post »

 
ABSTRACT
Digital Watermarking and data hiding have gained popularity in recent years as a means of protecting digital images from theft, illegal copying and unlawful reproduction. Some digital watermarking algorithms were proposed using spatial domain and transform domain techniques. The transform domain could be DCT, DFT or DWT. Several digital watermarking algorithms using wavelet transform are [...]

Read Full Post »

Fig 4. Haar DWT based logo extraction with Rotational attacks.

This paper proposes technique for digital logo watermarking in images exploiting the characteristics of Human Visual System (HVS), using Wavelet Transforms. The proposed work is based on different wavelets and the digital logo is embedded and extracted in images with the secret key and with the [...]

Read Full Post »