Publikation: Depth estimation using spectrally varying defocus blur
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This paper proposes a method to estimate depth from a single multispectral image by using a lens property known as chromatic aberration. Chromatic aberration causes light passing through a lens to be refracted depending on the wavelength. The refraction causes the angle of rays to vary depending on their wavelength and a change in focal length, which leads to a defocus blur for different wavelengths. We propose a theory to recover a continuous depth map from the blur in a single multispectral image that includes chromatic aberration. The proposed method needs only a standard wide-aperture lens, which naturally exhibits chromatic aberration, and a multispectral camera. Moreover, we use a simple yet effective depth-of-field synthesis method to calculate the derivatives and obtain all-in-focus images necessary to approximate spectral derivatives. We verified the effectiveness of the proposed method on various real-world scenes.
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ISHIHARA, Shin, Antonin SULC, Imari SATO, 2021. Depth estimation using spectrally varying defocus blur. In: Journal of the Optical Society of America A. Optical Society of America (OSA). 2021, 38(8), pp. 1140-1149. ISSN 1084-7529. eISSN 1520-8532. Available under: doi: 10.1364/JOSAA.422059BibTex
@article{Ishihara2021Depth-54754, year={2021}, doi={10.1364/JOSAA.422059}, title={Depth estimation using spectrally varying defocus blur}, number={8}, volume={38}, issn={1084-7529}, journal={Journal of the Optical Society of America A}, pages={1140--1149}, author={Ishihara, Shin and Sulc, Antonin and Sato, Imari} }
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