Table 1 First-order, second-order, and third-order linear residuals in the horizontal direction
From: Joint multi-domain feature learning for image steganalysis based on CNN
Residual type | HPF | Linear residual |
|---|---|---|
First-order | (1, − 1) | \(R_{ij}^{h} = y_{i,j+1}-y_{ij}\) |
Second-order | (1, − 2, 1) | \(R_{ij}^{h} = y_{i,j-1}-2y_{ij}+y_{i,j+1}\) |
Third-order | (1, − 3, 3, − 1) | \(R_{ij}^{h} = y_{i,j-1}-3y_{ij}+3y_{i,j+1}-y_{i,j+2}\) |