Table 1 Set threshold combinations
From: Blind image quality assessment via probabilistic latent semantic analysis
1th–6th | \(\varphi _1\) | \(15^\circ\) | \(15^\circ\) | \(15^\circ\) | \(15^\circ\) | \(15^\circ\) | \(15^\circ\) |
\(\varphi _2\) | – | \(15^\circ\) | \(45^\circ\) | \(90^\circ\) | \(135^\circ\) | \(160^\circ\) | |
7th–12th | \(\varphi _1\) | \(45^\circ\) | \(45^\circ\) | \(45^\circ\) | \(45^\circ\) | \(45^\circ\) | \(45^\circ\) |
\(\varphi _2\) | – | \(15^\circ\) | \(45^\circ\) | \(90^\circ\) | \(135^\circ\) | \(160^\circ\) | |
13th–18th | \(\varphi _1\) | \(90^\circ\) | \(90^\circ\) | \(90^\circ\) | \(90^\circ\) | \(90^\circ\) | \(90^\circ\) |
\(\varphi _2\) | – | \(15^\circ\) | \(45^\circ\) | \(90^\circ\) | \(135^\circ\) | \(160^\circ\) | |
19th–24th | \(\varphi _1\) | \(135^\circ\) | \(135^\circ\) | \(135^\circ\) | \(135^\circ\) | \(135^\circ\) | \(135^\circ\) |
\(\varphi _2\) | – | \(15^\circ\) | \(45^\circ\) | \(90^\circ\) | \(135^\circ\) | \(160^\circ\) | |
25th–30th | \(\varphi _1\) | \(160^\circ\) | \(160^\circ\) | \(160^\circ\) | \(160^\circ\) | \(160^\circ\) | \(160^\circ\) |
\(\varphi _2\) | – | \(15^\circ\) | \(45^\circ\) | \(90^\circ\) | \(135^\circ\) | \(160^\circ\) |