An improved digital watermarking technique based on 5-DWT, FFT & SVD

Optimal watermarking is an inventive technology, which has extended widely approximately the world due to the multimedia contents. In this study, we proposed optical watermarking for defocused pictures which is based on the combination of 5 level discrete wavelet transformation (5-DWT), Fast Fourier Transform (FFT) and singular value decomposition (SVD). Another viewpoint of this study is to calculate the robustness of the visual watermarking strategy, which is one of a kind of innovation that can add watermarked data to question picture information brought with advanced cameras with no particular additional equipment's structural engineering. Defocusing in pictures can also be communicated with difficulty with a line-spread function (LSF). We utilized the estimation of full-width at half-maximum (FWHM) of a Gaussian kernel blur because the extent to which pics had been defocused, which could tough LSF. We completed examinations where the efficiency of detection was assessed as we shifted the extent to which pictures were defocused. The outcomes from the analysis uncovered that optical watermarking innovation was greatly robustness against defocusing in pictures.