1 Level DWT Image Watermarking Algorithm for RGB Cover Images and Watermarks
Journal Title: IOSR Journals (IOSR Journal of Computer Engineering) - Year 2015, Vol 17, Issue 5
Abstract
Abstract: This paper proposes a new 1 level DWT (Discrete wavelet transform) robust image watermarking algorithm for RGB cover images and watermarks. In the proposed algorithm 1 level DWT is applied on RGB cover image. The DWT divides cover image into four bands namely a lower resolution approximation image (LL) as well as horizontal (HH), vertical (LH) and diagonal (HL) detail components and watermark is inserted into LL sub band. As high frequency sub-band is usually removed through noise attacks. The proposed algorithm is imperceptible as well as robust against wide variety of image processing attacks like Gaussian noise, Salt –pepper noise, Gaussian filter, Median filter, Histogram Equalization etc. The watermarked image is of good quality and achieves high PSNR. The proposed watermarking algorithm shows efficient detection of watermark. Extracted RGB watermark is same as that of original watermark with NC value as 0.99
Authors and Affiliations
Jaya Jeswani
Keywords
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