Digital Image Watermark Extraction in Discrete Wavelet Transform Domain using Support Vector Machines
نویسنده
چکیده
-This paper proposes a novel image watermarking method in discrete wavelet transform domain using support vector machines. Reference and watermark images are used to modify the coefficients of the particular even and odd blocks of the wavelet transformed image. Good learning ability of SVMs are used to extract the watermark from the watermarked image even after several different image processing attacks. This algorithm is secure and robust to various attacks, viz., JPEG Compression, Salt and Pepper noise, Row-Column blanking, Row-Column copying, Gamma Correction, Low Pass Filtering, Cropping, Bit Plane Removal, Histogram Equalization and Sharpening, etc. The performance of the method is tested using Normalized Cross Correlation (NCC) and Peak Signal to Noise Ratio (PSNR). KeywordsDigital Image Watermarking, Support Vector Machines, Discrete Wavelet Transform.
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