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Dual-focus stereo imaging

[+] Author Affiliations
Feng Li

University of Delaware, Computer and Information Sciences, 101 Smith Hall, 18 Amstel Avenue, Newark, Delaware 19716

Jian Sun

Microsoft Research Asia, 5/F, Beijing Sigma Center, No. 49, Zhichun Road, Hai Dian District, Beijing, China 100190

Jue Wang

Adobe Systems, 801 North 34th Street, Seattle, WA 98103-8882

Jingyi Yu

University of Delaware, Computer and Information Sciences, Newark, Delaware 19716

J. Electron. Imaging. 19(4), 043009 (December 06, 2010). doi:10.1117/1.3500802
History: Received February 09, 2010; Revised July 26, 2010; Accepted August 30, 2010; Published December 06, 2010; Online December 06, 2010
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We present a novel stereo imaging technique called dual-focus stereo imaging or DFSI. DFSI uses a pair of images captured from different viewpoints and at different foci, but with identical wide aperture size. Each image in an DFSI pair exhibits different defocus blur, and the two images form a defocused stereo pair. To model defocus blur, we introduce a defocus kernel map (DKM) that computes the size of the blur disk at each pixel. We derive a novel

disparitydefocusconstraint for computing the DKM in DFSI, and integrate DKM estimation with disparity map estimation to simultaneously recover both maps. We show that the recovered DKMs provide useful guidance for segmenting the in-focus regions. We demonstrate using DFSI in a variety of imaging applications, including low-light imaging, automatic defocus matting, and multifocus photomontage.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Topics

Apertures ; Cameras

Citation

Feng Li ; Jian Sun ; Jue Wang and Jingyi Yu
"Dual-focus stereo imaging", J. Electron. Imaging. 19(4), 043009 (December 06, 2010). ; http://dx.doi.org/10.1117/1.3500802


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