A SURVEY ON DWT AND LWT BASED DIGITAL IMAGE WATERMARKING
Keywords:
DWT, Embedding, Extraction, LWT, WatermarkAbstract
A watermark is a pattern of bits inserted into a digital image, audio, video or text file that uniquely identifies the owner of the particular image. The main steps in the watermarking technique are embedding and extraction. A watermark is embedded into the host image and we obtain the watermarked image. Later for proving the ownership, this watermark is extracted from the watermarked image and thereby the host image and watermark is obtained. This survey is based on the Discrete Wavelet Transform (DWT) and Lifting Wavelet Transform (LWT) techniques which are used for implementing digital image watermarking.
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