Table 4.
Results of 3-D low-contrast visibility test
| Insert | Mean pixel value (Mean) | Standard deviation (SD) |
|---|---|---|
| Polystyrene | 1085.57 | 17.8 |
| LDPE | 827.27 | 18.65 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.