1. A method of detecting a movement, the method comprising: detecting, by a sensor, a first event corresponding to the movement of an object and occurring in each of a plurality of pixels in image data; outputting, by the sensor, a plurality of event signals, based on the first event that is detected; storing, by a memory, time information at which the first event that is detected occurs in each of the plurality of pixels, in response to the plurality of event signals being outputted; extracting, by a processor, a signal from one or more first pixels of which the time information that is stored is in a predetermined time range, from the plurality of pixels, the signal that is extracted corresponding to a first event signal that is extracted from the plurality of event signals; determining, by the processor, time difference information of each of the one or more first pixels, based on a time difference between the time information that is stored of a first pixel, among the one or more first pixels, and each of the time information that is stored of at least one neighboring pixel surrounding the first pixel; and determining, by the processor, a sum of the determined time difference between the time information that is stored of the first pixel and each of the time information that is stored of the at least one neighboring pixel, as the time difference information.