Table 1.
Metric values for the experiment with the glyph size 50 mm. The number in {}-brackets are the corresponding visual variable values (arbitrary digital unit, adu) used for communication in the experiment. Note that the frequency is proportional to the inverse period length. The colour amplitude values are given as value/brightness V in , in HSV colour space.
| Visual Variable | min [mm] | max [mm] | step [mm] |
|---|---|---|---|
| Geometric amplitude | 0.1 {1} | 1.2 {12} | 0.1 |
| Geometric period length | 0.8 {12} | 5.1 {1} | 0.4 |
| Colour period length | 5.9 {5} | 12.1 {1} | 1.6 |
| min [V] | max [V] | step [V] | |
| Colour amplitude | 0.425 {1} | 0.85 {5} | 0.10625 |