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.
Title
Depth of Field Postprocessing For Layered Scenes Using Constant-Time Rectangle Spreading
Published
2008-12-30
Full Collection Name
Electrical Engineering & Computer Sciences Technical Reports
Other Identifiers
EECS-2008-187
Type
Text
Extent
10 p
Archive
The Engineering Library
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