Table 4 Summary of the proposed model

Proposed

To provide a means for the systematic development, and thus to develop a unified and more realistic theory, of digital image watermarking

Image-data (with different properties, e.g., original, watermarked, etc, see Figure 2)

Key generation

Digital image and signal processing

May not be suitable for studying steganography schemes

Watermark

Watermark generation

Cryptography

Message

Watermark embedding

Key (for each function)

Watermark detection

Watermark extraction