Table 3 Structure of image hash
From: Robust image hashing using ring partition-PGNMF and local features
Global vector | Salient vector S | ||
|---|---|---|---|
Ring partition-PGNMF | \({\text{F}}\left( {x, y, w, h} \right)\) | \({\text{Z}}\) | Final hash length |
64 integers | 4 × 6 = 24 integers | 3 × 6 = 18 integers | 106 integers |