The primary goal of this study was to find a measurement method for motion blur whichis easy to carry out and gives results that can be reproduced from one lab to another. This methodshould be able to also take into account methods for reduction of motion blur such as backlight flash-ing. Two methods have been compared. The first method uses a high-speed camera that permits us todirectly picture the blurred-edge profile. The second one exploits the mathematical analysis of themotion-blur formation to construct the blurred-edge profile from the temporal step response. Meas-urement results and method proposals are given and discussed.