The surveillance program, internally called Missed Scan Detection, uses cameras to help identify and correct checkout scanning errors and failures.

Ireland-based Everseen is one of several companies supplying Walmart with the technology for its Missed Scan Detection program.

"We are continuously investing in people, programs and technology to keep our stores and communities safe," a Walmart spokeswoman said.

Walmart is using computer vision technology to monitor checkouts and deter potential theft in more than 1,000 stores, the company confirmed to Business Insider.

The surveillance program, which Walmart refers to internally as Missed Scan Detection, uses cameras to help identify checkout scanning errors and failures.