Synergetic Scheme for Digital Image Watermarking
Anand Ghuli, Pandurang Biradar · 2020 IEEE Bangalore Humanitarian Technology Conference (B-HTC) · 2020
The proposed scheme uses blind and non-blind digital color image watermarking with hybrid transformation. An image which is binary in nature is embedded in to color image with the use of the technique blind watermarking. The blind watermarking technique makes use of “Discrete Wavelet Transformation” (DWT — 2-level Haar Wavelets). To locate correct place to embed the watermark HL bands are considered. The conversion of spatial domain to frequency is done with Fast Fourier Transformation (2-D FFT). Then with the help of pseudo random sequence, block wise the scanning of host image is done and watermark is also embedded at the same time into predefined binary sequence components. Then non-blind technique embeds first watermarked image into second host image. DMeyer DWT is applied to have approximation coefficients for critical components. The combination of “Discrete Fourier Transformation” (DFT) and “Singular Value Decomposition” (SVD) are applied to get sustainable components of the transformed image. From this combined approach we achieved good fidelity and robustness against – “Rotation”, “Cropping”, “JPEG compression” and for noises “Salt & pepper”, “Gaussian”, “Speckle” and multiple noises.