Exploring defocus matting: Nonparametric acceleration, super-resolution, and off-center matting

Neel Joshi*, Wojciech Matusik, Shai Avidan, Hanspeter Pfister, William T. Freeman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Defocus matting is a fully automatic and passive method for pulling mattes from video captured with coaxial cameras that have different depths of field and planes of focus. Nonparametric sampling can accelerate the video-matting process from minutes to seconds per frame. In addition, a super-resolution technique efficiently bridges the gap between mattes from high-resolution video cameras and those from low-resolution cameras. Off-center matting pulls mattes for an external high-resolution camera that doesn't share the same center of projection as the low-resolution cameras used to capture the defocus matting data.

Original languageEnglish
Pages (from-to)43-52
Number of pages10
JournalIEEE Computer Graphics and Applications
Issue number2
StatePublished - Mar 2007
Externally publishedYes


  • Alpha matting and compositing
  • Example-based rendering
  • Image-based rendering
  • Super-resolution
  • Video processing


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