Efficient reversible data hiding for VQ-compressed images based on index mapping mechanism
A novel reversible data-hiding scheme for VQ-compressed images is proposed. We create index mappings by VQ indices with zero and the largest occurrence numbers. The indices in each mapping correspond to binary representations of secret subsets. Mapping optimization by index histogram is conducted to obtain high hiding capacity. Data embedding can be achieved through the simple index substitution operation.
reversible data hiding index mapping hiding capacity vector quantization