There are programs to do this, I remember seeing a thread about it some time ago. From what I remember they don't really work all that well.
I did a search on Google and found this trial version:
This thread is now locked and can not be replied to.
What is Amazon Go and will it come to the UK? The store without checkouts or queues
1995-2015: How technology has changed the world in 20 years
Why ecommerce hasn't taken off on social media
New MacBook Pro 2016 review | MacBook Pro with Touch Bar review: Apple's expensive and powerful…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.