Coded exposure photography: motion deblurring using fluttered shutter

  • Authors:

  • Ramesh Raskar;Amit Agrawal;Jack Tumblin

  • Affiliations:

  • Mitsubishi Electric Research Labs (MERL), Cambridge, MA;Mitsubishi Electric Research Labs (MERL), Cambridge, MA;Northwestern University

  • Venue:
  • ACM SIGGRAPH 2006 Papers
  • Year:
  • 2006

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Abstract

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.