TY - JOUR
AU - Raskar, Ramesh
AB - We describe a novel multiplexing approach to achieve tradeoffs in space, angle and time resolution in photography. We explore the problem of mapping useful subsets of time‐varying 4D lightfields in a single snapshot. Our design is based on using a dynamic mask in the aperture and a static mask close to the sensor. The key idea is to exploit scene‐specific redundancy along spatial, angular and temporal dimensions and to provide a programmable or variable resolution tradeoff among these dimensions. This allows a user to reinterpret the single captured photo as either a high spatial resolution image, a refocusable image stack or a video for different parts of the scene in post‐processing. A lightfield camera or a video camera forces a‐priori choice in space‐angle‐time resolution. We demonstrate a single prototype which provides flexible post‐capture abilities not possible using either a single‐shot lightfield camera or a multi‐frame video camera. We show several novel results including digital refocusing on objects moving in depth and capturing multiple facial expressions in a single photo.
TI - Reinterpretable Imager: Towards Variable Post‐Capture Space, Angle and Time Resolution in Photography
JO - Computer Graphics Forum
DO - 10.1111/j.1467-8659.2009.01646.x
DA - 2010-05-01
UR - https://www.deepdyve.com/lp/wiley/reinterpretable-imager-towards-variable-post-capture-space-angle-and-0Kw3Du8Rwn
SP - 763
VL - 29
IS - 2
DP - DeepDyve
ER -