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
No References for this article.
No Supplementary Data.
No Article Media
Phase Detect Autofocus (PDAF);
Document Type: Research Article
Publication date: January 13, 2019
More about this publication?
For more than 30 years, the Electronic Imaging Symposium has been serving those in the broad community - from academia and industry - who work on imaging science and digital technologies. The breadth of the Symposium covers the entire imaging science ecosystem, from capture (sensors, camera) through image processing (image quality, color and appearance) to how we and our surrogate machines see and interpret images. Applications covered include augmented reality, autonomous vehicles, machine vision, data analysis, digital and mobile photography, security, virtual reality, and human vision. IS&T began sole sponsorship of the meeting in 2016. All papers presented at EIs 20+ conferences are open access.
Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.