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An unorthodox approach towards shape from focus
2011 18th IEEE International Conference on Image Processing, 2011Although numerous methods have been recently proposed in recovering shape from image focus, all follow similar precedent of focus measure application after image acquisition and depth is recovered by maximizing the focus curves obtained via this application. This is followed by utilizing approximation techniques to refine the initial depth map. In this
Mannan Saeed Muhammad, Tae-Sun Choi
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Shape From Focus by Total Variation
IVMSP 2013, 2013Usually, in Shape From Focus (SFF) methods, a single focus measure is applied on an image sequence to obtain an initial depth map and then an approximation technique is used to recover three-dimensional (3D) shape of an object. However, different focus measures perform differently in diverse conditions and it is hard to get accurate 3D shape based on a
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Microscopic shape from focus using active illumination
Proceedings of 12th International Conference on Pattern Recognition, 2002Shape from focus relies on surface texture for the computation of depth. In many real-world applications, surfaces can be smoothly shaded and lacking in detectable texture. In such cases, shape from focus generates inaccurate and sparse depth maps. This paper presents a novel extension to the original shape from focus method. A strong texture is forced
M. Noguchi, S.K. Nayar
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Combining Depth Maps through 3D Weighted Least Squares in Shape from Focus
International Conference on Electronics, Information and Communications, 2019In this paper, we attempt to combine depth maps obtained by applying a number of focus measure operators in such a manner that their contributions in the resultant depth map are governed by an additional statistical clue of the shape.
Usman Ali, M. Mahmood
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Enforcing spatially coherent structures in shape from focus
Multimedia tools and applications, 2023Usman Ali, M. Mahmood
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Fast Shape-From-Focus method for 3D object reconstruction
Optik (Stuttgart), 2018Shape-From-Focus method (SFF method) is a method for recovering depth from an image series which are taken with different focus settings. For method presented in this paper, the series must be taken with an optical device (optical microscope, CCD or ...
D. Martišek
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Improved shape-from-focus reconstruction for high dynamic range freedom surface
Optics and lasers in engineering, 2023Zhoumiao He +3 more
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Microscopic Shape from Focus using White Light Interferometric Fringes
Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018In this work we study the use of a focus measure to improve the 3D reconstruction of low reflectivity microscopic samples using white light interference microscopy. Simulation and experimental results show the improved reconstruction.
Marrugo Hernández, Andrés Guillermo +2 more
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Measurement of the shape of objects by shape from focus
SPIE Proceedings, 2015Shape from focus is a method for the accurate measurement of the geometrical shape of objects. The measurement principle is the local focus search. Therefore, the method is suitable only for objects with a texture. The shape of the object is extracted from a series of 2D images.
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3D Shape from Focus Using LULU Operators
2012Extracting the shape of an object is one of the important tasks to be performed in many vision applications. One of the difficult challenges in 3D shape extraction is the roughness of the surfaces of objects. Shape from focus (SFF) is a shape recovery method that reconstructs the shape of an object from a sequence of images taken from the same ...
Roushanak Rahmat +4 more
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