High Payload Lossless Digital Image Watermarking Using Integer Wavelet Transform

In this paper a high payload lossless digital image watermarking technique based on Integer Wavelet Transform is proposed. Digital watermarking is the process of embedding the watermark image into a host image which is imperceptible by human visual system. The small deviations in data values are not allowed in certain images for obvious reasons and a potential risk of a person misinterpreting an image. After extracting the embedded data, the original image should be recovered from watermarked image. A preprocessing histogram adjustment is used to prevent overflow/underflow. In proposed technique, the data are embedded into one or more bit planes of wavelet coefficients of high frequency sub bands. This technique embeds much more data imperceptibly than the existing techniques. The experimental results have demonstrated the superiority of the proposed method over existing techniques. Index Terms; Digital watermarking, Integer wavelet transform, Histogram modification