Depth of Field Postprocessing For Layered Scenes Using Constant-Time Rectangle Spreading
Todd Jerome Kosloff and Michael Tao and Brian A. Barsky
EECS Department, University of California, Berkeley
Technical Report No. UCB/EECS-2008-187
December 30, 2008
http://www2.eecs.berkeley.edu/Pubs/TechRpts/2008/EECS-2008-187.pdf
Control over what is in focus and what is not in focus in an image is an important artistic tool. The range of depth in a 3D scene that is imaged in sufficient focus through an optics system, such as a camera lens, is called depth of field. Without depth of field, everything appears completely in sharp focus, leading to an unnatural, overly crisp appearance. Current techniques for rendering depth of field in computer graphics are either slow or suffer from artifacts and limitations in the type of blur. In this paper, we present a new image filter based on rectangle spreading which is constant time per pixel. When used in a layered depth of field framework, it eliminates the intensity leakage and depth discontinuity artifacts that occur in previous methods. We also present several extensions to our rectangle spreading method to allow flexibility in the appearance of the blur through control over the point spread function.
BibTeX citation:
@techreport{Kosloff:EECS-2008-187, Author= {Kosloff, Todd Jerome and Tao, Michael and Barsky, Brian A.}, Title= {Depth of Field Postprocessing For Layered Scenes Using Constant-Time Rectangle Spreading}, Year= {2008}, Month= {Dec}, Url= {http://www2.eecs.berkeley.edu/Pubs/TechRpts/2008/EECS-2008-187.html}, Number= {UCB/EECS-2008-187}, Abstract= {Control over what is in focus and what is not in focus in an image is an important artistic tool. The range of depth in a 3D scene that is imaged in sufficient focus through an optics system, such as a camera lens, is called depth of field. Without depth of field, everything appears completely in sharp focus, leading to an unnatural, overly crisp appearance. Current techniques for rendering depth of field in computer graphics are either slow or suffer from artifacts and limitations in the type of blur. In this paper, we present a new image filter based on rectangle spreading which is constant time per pixel. When used in a layered depth of field framework, it eliminates the intensity leakage and depth discontinuity artifacts that occur in previous methods. We also present several extensions to our rectangle spreading method to allow flexibility in the appearance of the blur through control over the point spread function.}, }
EndNote citation:
%0 Report %A Kosloff, Todd Jerome %A Tao, Michael %A Barsky, Brian A. %T Depth of Field Postprocessing For Layered Scenes Using Constant-Time Rectangle Spreading %I EECS Department, University of California, Berkeley %D 2008 %8 December 30 %@ UCB/EECS-2008-187 %U http://www2.eecs.berkeley.edu/Pubs/TechRpts/2008/EECS-2008-187.html %F Kosloff:EECS-2008-187