NDLI: Shape from Focus through Laplacian Using 3D Window

Content Provider	IEEE Xplore Digital Library
Author	Youngeun An Gwangwon Kang Il-Jung Kim Hyun-Sook Chung Jongan Park
Copyright Year	2008
Description	Author affiliation: Chosun Univ., South Korea (Youngeun An; Gwangwon Kang; Hyun-Sook Chung; Jongan Park) \|\| Korea Electron. Technol. Inst., South Korea (Il-Jung Kim)
Abstract	One of the fundamental objectives of computer vision is to reconstruct a three-dimensional (3D) structure of objects from two-dimensional (2D) images. The basic idea of image focus is that objects at different distances from a lens are focused at different distances. Shape from Focus (SFF) is the problem of reconstructing the depth of the scene changing actively the optics of the camera until the point of interest is in focus. The point in focus gives information about its depth through the thin lens Gaussian law. An effective focus measure operator should be a high-pass filter. Usually, the variation of frequency components are not enough that focus measure could be computed pixel-wise, therefore, sum of pixels in small 2D windows are used for detecting the high frequency components. In this paper, we propose to use 3D windows instead of 2D windows for detecting the high frequency components in the images. The proposed algorithm using 3D window gives better depth map than the previous algorithms using 2D windows.
Starting Page	46
Ending Page	50
File Size	378534
Page Count	5
File Format	PDF
ISBN	9780769534312
DOI	10.1109/FGCN.2008.139
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-13
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical filters Computer vision Laplace equations Shape Shape from focus Gaussian law Image reconstruction Layout 3D Window Focusing Frequency Cameras 2D window Lenses
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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