This site — which appears to be the source data for OP as well — has some really nice visualizations. It looks like it's more a scan than a flash, combined with

This site — which appears to be the source data for OP as well — has some really nice visualizations. It looks like it's more a scan than a flash, combined with extraordinarily fast frame rates to precisely measure the light's travel time and allow for reconstruction. http://www.computationalimaging.org/publications/nlos-fk/ http://www.computationalimaging.org/publications/nlos-fk/