A data processing method performed by a computer for detecting reflections of light pulses, comprising the steps: acquiring a camera signal representing a series of camera images of a camera viewing field； detecting whether the camera signal includes one or more light mark portions within the camera viewing field possibly representing a light pulse reflection； relating the detected light mark portions in the series of camera images to a pre-defined emission pattern of the light pulses； and determining that a light mark portion is a reflected light pulse, if the light mark portion in the series of camera images matches to the pre-defined emission pattern of the light pulses.
