Adaptive pairwise reversible watermarking with horizontal grouping

This paper revisits the recently proposed adaptive pairwise reversible watermarking scheme of IEEE Trans. on Image Processing 2016 and investigates a different pairing that favors the grouping in the horizontal direction. The horizontal grouping imposes a new prediction scheme, a different complexity measure, a new pixel selection procedure and several other adjustments. For some test images, the newly proposed scheme outperforms the 2016 adaptive pairwise approach.