QR Code Data Hiding Algorithm Based on Cell Splitting Fusion with Contrast Stretching
H. T. Li, Pengcheng Huang · 2023
This paper proposes a new strategy for embedding secret information into QR codes based on module unit cell splitting techniques. This strategy splits unit cells, selects sub-cells, and makes small adjustments to their pixel values using certain offsets to embed secret information. During the decoding phase, segmented linear transformation contrast stretching technology and median filter noise reduction processing is applied to ensure accurate extraction of secret information. Secret information is extracted by combining the adjusted resolution modules with the original QR code information. Experimental results show that the proposed scheme has stronger concealment and stronger robustness than the previous scheme, it ensures the security of information transmission while providing high effective payload for secret information. These results demonstrate the feasibility and superiority of the proposed scheme in real-world applications for secret transmission.