Improved Data Hiding Method by Block Parity for Binary Images

This paper proposes a new method for data hiding in binary images using optimized bit position to replace a secret bit. This method manipulates blocks, which are subdivided. The parity bit for a specified block decides whether to change or not, to embed a secret bit. By finding the best position to insert a secret bit for each divided block, the image quality of the resulting stego-image can be improved, while maintaining low computational complexity. The experimental results show that the proposed method has an improvement with respect to a previous work.