Paper Info
Title
Improving resolution and depth-of-field of light field cameras using a hybrid imaging system
Abstract
Current light field (LF) cameras provide low spatial resolution and limited depth-of-field (DOF) control when compared to traditional digital SLR (DSLR) cameras. We show that a hybrid imaging system consisting of a standard LF camera and a high-resolution standard camera enables (a) achieve high-resolution digital refocusing, (b) better DOF control than LF cameras, and (c) render graceful high-resolution viewpoint variations, all of which were previously unachievable. We propose a simple patch-based algorithm to super-resolve the low-resolution views of the light field using the high-resolution patches captured using a high-resolution SLR camera. The algorithm does not require the LF camera and the DSLR to be co-located or for any calibration information regarding the two imaging systems. We build an example prototype using a Lytro camera (380×380 pixel spatial resolution) and a 18 megapixel (MP) Canon DSLR camera to generate a light field with 11 MP resolution (9× super-resolution) and about 1 over 9 th of the DOF of the Lytro camera. We show several experimental results on challenging scenes containing occlusions, specularities and complex non-lambertian materials, demonstrating the effectiveness of our approach.
Year
DOI
Venue
2014
10.1109/ICCPHOT.2014.6831814
Computational Photography
Keywords
Field
DocType
image capture,image sensors,optical focusing,DOF control,DSLR,Lytro camera,complex non-lambertian materials,depth of field,digital SLR camera,digital refocusing,high-resolution standard camera,hybrid imaging system,light field camera,occlusions,patch capture,patch-based algorithm,spatial resolution,specularities,standard LF camera
Computer graphics (images),Computer science,Camera auto-calibration,Light field,Lens (optics),Artificial intelligence,Iterative reconstruction,Computer vision,Optics,Pixel,Image resolution,Depth of field,Three-CCD camera
Conference
ISSN
Citations 
PageRank 
2164-9774
18
0.64
References 
Authors
25
3
Name
Order
Citations
PageRank
Vivek Boominathan1283.82
Kaushik Mitra213817.15
Ashok Veeraraghavan3149588.93