The company Autoliv has a bunch of such products, they're used by major car manufacturers. See for instance http://www.autoliv.com/ProductsAndInnovations/Activ

The company Autoliv has a bunch of such products, they're used by major car manufacturers. See for instance http://www.autoliv.com/ProductsAndInnovations/ActiveSafetySystems/Pages/VisionSystems.aspx http://www.autoliv.com/ProductsAndInnovations/ActiveSafetySy... which describes their "vision systems", the features of which include pedestrian-detection. It's possible that Volvo has its own in-house tech for this, but Autoliv are huge.