An Interactive Background Blurring Mechanism and Its Applications
Date Issued
2009
Date
2009
Author(s)
Yan, Chih-Yu
Abstract
Photographers usually take a shallow focus image to highlight the main subject in the picture and blur the distractions in the background region. Softening these distractions can not only produce special vision effect but also keep the privacy for people in the background. In this work, we develop a new defocusing algorithm to simulate the blur effect in the background caused by a wide aperture camera. We also design an easy-to-use interactive interface for users to segment foreground/background objects, adjust the depth of field for images, and assign camera settings. Techniques including lazy snapping, alpha matting, depth information generation and defocusing are integrated in the system. Experimental results show the effectiveness of the proposed mechanism. Furthermore, some applications on privacy preserving and photo browsing are also provided.
Subjects
Image
refocus
depth of field
shallow focus
defocus blur
Type
thesis
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