Abstract
Steganography is a widely used approach to embed tremendous amount of secret message while maintaining satisfactory visual quality. Least-significant-bit (LSB) substitution is one of the famous techniques applied in steganography, which makes modifications to the cover image by simply substituting secret bits for the LSBs of the cover pixel. This paper presents a novel data hiding scheme based on LSB substitution in which binary secret data can directly be concealed into the cover image. To enhance the embedding capacity, as much as 2 secret bits can be embedded into each cover pixel by modifying 3 LSBs with the guidance of a reference table. Experimental results confirm that the proposed scheme outperforms the related schemes in terms of embedding capacity and visual quality.
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