Table 1 of
Sinha, Mol Vis 2021; 27:666-678. Table 1 of
Sinha, Mol Vis 2021; 27:666-678.
Table 1. Possible orientation patterns based on the value of eigenvalues λ 1, λ 2 of the Hessian matrix (|λ 1| ≥ | λ 2|).
| 1 | 2 | Orientation pattern |
|---|---|---|
| Low | Low | Flat or noise no preferred direction |
| High - | Low | Bright tubular structure |
| High + | Low | Dark tubular structure |
| High - | High - | Bright blob-like structure |
| High + | High + | Dark blob-like structure |