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Dappled Photography: Mask Enhanced Cameras for Heterodyned Light Fields and Coded Aperture Refocusing
 

Summary: Dappled Photography: Mask Enhanced Cameras for
Heterodyned Light Fields and Coded Aperture Refocusing
Ashok Veeraraghavan Ramesh Raskar Amit Agrawal
Mitsubishi Electric Research Labs (MERL), Cambridge, MA
Ankit Mohan Jack Tumblin
Northwestern University, Evanston, IL
Figure 1: Our heterodyne light field camera provides 4D light field and full-resolution focused image simultaneously. (First Column) Raw
sensor image. (Second Column) Scene parts which are in-focus can be recovered at full resolution. (Third Column) Inset shows fine-scale
light field encoding (top) and the corresponding part of the recovered full resolution image (bottom). (Last Column) Far focused and near
focused images obtained from the light field.
Abstract
We describe a theoretical framework for reversibly modulating 4D
light fields using an attenuating mask in the optical path of a lens
based camera. Based on this framework, we present a novel design
to reconstruct the 4D light field from a 2D camera image without
any additional refractive elements as required by previous light field
cameras. The patterned mask attenuates light rays inside the camera
instead of bending them, and the attenuation recoverably encodes
the rays on the 2D sensor. Our mask-equipped camera focuses just
as a traditional camera to capture conventional 2D photos at full

  

Source: Agrawal, Amit - Mitsubishi Electric Research Labs
Salvaggio, Carl - Chester F. Carlson Center for Imaging Science, Rochester Institute of Technology

 

Collections: Engineering