Abstract: Traditional methods of detecting a moving target involve acquisition of video rate imagery in which data is acquired, stored, transmitted and then processed. Processing requires software for high precision frame-to-frame registration, detection and tracking. Example embodiments of the present invention include a method and an apparatus for generating instantaneous velocity maps that do not require acquisition, transmission, storing or processing of video-rate data. Incident radiation is directed onto one or more detectors, the detectors operating at a frame rate. The detectors acquire the first and second complementary sub-images of a single frame. The first and second complementary sub-images are combined to yield the change detection map. Example embodiments of the methods and devices described herein can be used in automatic detection of motion without tracking, optimization of image deblurring and optimization of detection of high speed and high frequency events, among others.