In a conventional single-exposure photograph, moving objects or moving cameras cause motion blur. The exposure time defines a temporal box filter that smears the moving object across the image by convolution. This box filter destroys important high-frequency spatial details so that deblurring via deconvolution becomes an ill-posed problem.
Rather than leaving the shutter open for the entire exposure duration, we “flutter” the camera’s shutter open and closed during the chosen exposure time with a binary pseudo-random sequence. The flutter changes the box filter to a broad-band filter that preserves high-frequency spatial details in the blurred image and the corresponding deconvolution becomes a well-posed problem. We demonstrate that manually-specified point spread functions are sufficient for several challenging cases of motion-blur removal including extremely large motions, textured backgrounds and partial occluders.
Our portable prototype camera
Picture taken with a traditional camera
Picture taken with our camera
Additional Results Outdoor Taxi Comparisons with Short Exposure and Traditional Camera License Plate Retrieval from Blurred Image Related Papers: Resolving Objects at Higher Resolution from a Single Motion-Blurred Image, CVPR 2007 Dappled Photography: Mask Enahnced Cameras for Heterodyned Light Fields and Coded Aperture Refocusing, SIGGRAPH 2007