Robust reversible watermarking scheme using Slantlet transform matrix

- A new robust reversible image watermarking method based on Slantlet transform (SLT) is proposed.
- The host image is divided into non-overlapping blocks before applying SLT and the histogram modification process is applied to prevent the overflow underflow of the pixel values in each block.
- The watermark embedding process depends on modifying the mean values of the SLT coefficients for one subband in each block.
- Experimental tests based on 100 general images and 100 medical images demonstrate the efficiency of the proposed scheme.
- The results prove that the proposed method is completely reversible with improved capacity, robustness and invisibility.