Imperceptible Watermarking Algorithm Using Block LSB Scheme for Color Images
ABSTRACT
It is well known that now a day™s more and more people are publishing papers, books, videos and photographs on the internet. The numerous properties of digital media have made copyrights violations easy. The simple replication and transmission as well as file sharing are just some examples. To overcome that the proposed technique is imperceptible watermarking algorithm using spatial domain block LSB scheme for color image authentication. Watermark is one, which is imperceptibly added to the cover-signal in order to convey the hidden data. Digital Watermarking is the process that embeds data called a watermark into a multimedia object such that watermark can be detected or extracted later to make an assertion about the object. In the proposed model an invisible approach for insertion “ extraction of a digital watermark, a color watermark image into a color host image. The host image is simply divided into some blocks and encrypts with the symmetric key then embeds the color watermark image of all blocks using 2 bit and 1 bit LSB schemes and perceptually it is entirely invisible to Human Visual System. This proposed watermarking framework ensures that the extracted watermark remains intact, quality is improved and security issues are performed using a secret key. For the extraction of watermark image blind extraction method is used. This is the new watermarking approach where the host image and watermark image both are the color images.

Submitted by
V.Vijaya Raghavan1, M.Laavanya1 and Dr.K.Bommanna Raja2 1 Odaiyappa College of Engineering and Technology, Theni, Tamilnadu, India. 2 Principal, Excel College of Engineering for Women, Komarapalayam, Namakkal.
Keywords “ Imperceptible Watermarking, Spatial Domain, Insertion-Extraction Techniques, HVS, LSB, Block Scheme.