Why stores installing cameras with license-plate readers is raising privacy concerns

There is controversy surrounding a new crime prevention technology being used outside stores, including Home Depot and Lowe's.

The companies are installing special cameras in some parking lots that are equipped with automated license-plate readers.

The goal is to boost safety and more easily track down any thieves.

It's not yet known exactly which locations will have the cameras.

This comes after a string of crimes at Home Depot stores, including a theft ring that targeted stores in four Philadelphia-area counties last year.

However, civil rights groups are raising concerns about privacy rights.

"They can literally trace -- almost exactly -- where I've been just by connecting all of the different data points based upon that license plate number. I can find out where somebody lives just based upon tracking their data," said associate professor Tom Mattson, with the University of Richmond. "It can recreate my morning probably better than I can recreate my morning."

Both Home Depot and Lowe's tell ABC News they do not share any information with third parties.