video license plate recognition
Can you track someone by their license plate? Can a civilian run a license plate number?

Facial recognition and biometric scanning systems also use computer vision technology to identify individuals for security purposes. The most common example of computer vision in facial recognition is for securing smartphones. More advanced uses of facial recognition and biometrics include in residential or business security systems that use unique physiological features of individuals to verify their identity. Deep learning algorithms can identify the unique patterns in a person’s fingerprints and use it to control access to high-security areas such as high-confidentiality workplaces, such as nuclear powerplants, research labs, and bank vaults.

I recommend you start with an old Axis IP Camera. They are well documented and easy to setup. Buy an old one for $10-20. Follow the 
Panasonic's ANPR (Automatic Number Plate Recognition Technology) is an