CDISS-BEMOS: A New Color Document Image Steganography System Based on Beta Elliptic Modeling of the Online Signature

Abstract

Based on the Beta elliptic Modeling, a new signature steganography color document image system is proposed in this paper. This system uses the Binary Robust Invariant Scalable Keypoint (BRISK) detector to obtain the potential feature points used for constructing the embedding regions. The Beta elliptic signature is transformed into a secret message bits representation using the Huffman Coding (HC) to increase the performance of our system. Then, the secret message bits are divided into three sub message bits $\mathrm{m}_\mathrm{R}$, $\mathrm{m}_\mathrm{G}$, and $\mathrm{m}_\mathrm{B}$, using the weights $\upalpha _\mathrm{R}$, $\upalpha _\mathrm{G}$, and $\upalpha _\mathrm{B}$, respectively. Finally, each sequence bits is embedded into the corresponding channel, red (R), green (G), and blue (B) by modifying the first Least Significant Bit (LSB) of the embedding regions pixels. The robustness evaluation, quantitative and qualitative experimental results on multiple datasets: L3iDocCopies, LRDE Document Binarization Dataset, and on standard test images, demonstrates that the proposed color document images steganography system in the spatial domain maintains a better visual quality measured by Peak Signal to Noise Ratio (PSNR), Structural Similarity Index Matrix (SSIM), and Human Visual System (HSV) metrics, with relatively less computational complexity, which approves its effectiveness as compared to existing systems.