Securing a local network is orders of magnitude easier than a laptop which accesses the internet constantly.
Stick the cameras on a vlan only accessable to the (local) servers doing the face recognition, stick the servers on a vlan that has no direct connection to the internet.
Compare this to a laptop which is connected to the internet with multiple attack vectors (browser, email client, etc...)
Stick the cameras on a vlan only accessable to the (local) servers doing the face recognition, stick the servers on a vlan that has no direct connection to the internet.
Compare this to a laptop which is connected to the internet with multiple attack vectors (browser, email client, etc...)