38
SLN-VIZNAS-IOT User Guide, Rev. 1.1, 10/2020
NXP Semiconductors
Figure 55: "emotion 4"
The more emotions that are being actively recognized, the lower the emotion accuracy.
For this reason, we recommend using two or four emotions.
Please note the “Neutral”
emotion is a standard state and is not displayed.
3.2.14
Configure Liveness Detection
Kits equipped with the dual camera adapter come with the ability to perform liveness/anti-
spoofing detection as an added level of security for those using the kit. This feature comes
enabled by default.
Using the command “
liveness <off|on>
” can be used to toggle this feature off or on. For
the command to take effect, the board will automatically reset itself, so make sure you
have any faces you want to retain saved in flash.
Figure 56: "liveness off" command
Figure 57: "liveness on" Command