Review of Digital Image Colour Water Marking
Volume: 4 - Issue: 06 - Date: 01-06-2015
Approved ISSN: 2278-1412
Published Id: IJAECESTU242 | Page No.: 503-506
Author: Ayushi Potfode
Co- Author: Deepak Kourav
Abstract:-Now-a-days internet play a big role and used for carrying information from one place
to another. And this information may be images, audio, and also video. Strikes on the digital data
are very simple and easily monitored in the internet. And in this way watermarking process is used
for the purpose of authentication. And in the grayscale image watermarking process is used for the
process of embedding and detection. Wavelet multi-resolution is also used in the watermarking
process. Wavelet means the small signal which work simultaneously in time and frequency. During
the embedding process, spread spectrum technique is used. And the influence of watermark is
adjusted according the cover image or the original form of image. The DCT (Discrete Cosine
Transform) and DWT (Discrete Wavelet Transform) method are used. And this method is not more
resistant against the different types of strikes, different forms of noise and JPEG compression
because non-blind watermarking algorithm is used in that case. In this paper we purposed a new
method and technique which is more resistive against the different types of attacks, different types
of noises and JPEG compression. We have use DWPT (Discrete Wavelet Packet Transform) and
also the blind detection technique. The meaning of Blind detection is that, we cannot use the
original or the cover image information during its extraction process. And for the point of view of
security we also have to implant the confidential key. And this confidential key is prepared by
using the different kinds of image or the text image. And this method is basically used for the
purpose of copyright verification
Key Words:-Colour, JPEG compression, DWPT, wavelet, watermark.
Area:-Engineering
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