A security steganography scheme based on hdr image
This addresses security limitations in digital image steganography for applications requiring high payloads, though it appears incremental by adapting existing methods to a new image format.
The paper tackles the problem of insufficient security in high-payload steganography in spatial and JPEG domains by proposing a novel adaptive scheme based on 32-bit HDR images and Norm IEEE 754, achieving satisfactory security at payloads of 0.3 to 0.5 bits per pixel.
It is widely recognized that the image format is crucial to steganography for that each individual format has its unique properities. Nowadays, the most famous approach of digital image steganography is to combine a well-defined distortion function with efficient practical codes such as STC. And numerous researches are concentrated on spatial domain and jpeg domain. However, whether in spatial domain or jpeg domain, high payload (e.g., 0.5 bit per pixel) is not secure enough. In this paper, we propose a novel adaptive steganography scheme based on 32-bit HDR (High dynamic range) format and Norm IEEE 754. Experiments show that the steganographic method can achieve satisfactory security under payload from 0.3bpp to 0.5bpp.