Credible repair of Sony main-sensor PDAF striping artifacts

Research output: Contribution to journalConference articlepeer-review


Since the introduction of the Minolta Maxxum 9000 in 1985, PDAF (phase detect automatic focus) has been the standard way to achieve sharply-focused images of fast-moving action, such as professional sports. In a typical SLR (single lens reflex) camera, the image for the optical viewfinder is reflected up by the main mirror, while a secondary mirror and optics copy the image to the PDAF detector. However, such an arrangement is impractical for mirrorless digital cameras. Thus, there have been a variety of methods used to incorporate phase sensing on the main sensor - with various trade-offs. The current work discusses some of these trade-offs and then describes in detail a specific type of striping artifact introduced by the masked pixel structures used in Sony sensors. A computational method for credible repair of this artifact also is presented. The method described is quick and fully automatic; it has been implemented as KARWY-SR, an open source JavaScript version using a drag-and-drop interface to repair the artifact in Sony ARW raw files.

Original languageEnglish
Article number585
JournalIS and T International Symposium on Electronic Imaging Science and Technology
Issue number4
StatePublished - Jan 13 2019
Event2019 Photography, Mobile, and Immersive Imaging Conference, PMII 2019 - Burlingame, United States
Duration: Jan 13 2019Jan 17 2019

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Human-Computer Interaction
  • Software
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics


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