Authors - Thanh-Phuong Ngo, Van-Thanh Huynh, Thai-Son Nguyen Abstract - This paper presents a novel Reversible Data Hiding (RDH) method for dual images. First, secret data is converted into a binary sequence of equal length and then divided into shorter segments to control the amount of data embedded into each pixel. The embedding process uses two copies of the original image to distribute the data, reducing the impact on each image while maintaining overall image quality. During recovery, the original image is restored by averaging the pixel values at corresponding locations in the two stego images, while the embedded data is recovered through a reverse process. Experimental results on grayscale images demonstrate that the method maintains good image quality, achieving a high Peak Signal-to-Noise Ratio (PSNR) across different embedding levels while ensuring accurate recovery of both the secret data and the original image.
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