Results 11 to 20 of about 562,132 (184)
Reliability measure for shape-from-focus [PDF]
Image and Vision Computing, 2013 Shape-from-focus (SFF) is a passive technique widely used in image processing for obtaining depth-maps. This technique is attractive since it only requires a single monocular camera with focus control, thus avoiding correspondence problems typically found in stereo, as well as more expensive capturing devices.
Pertuz, Said +2 more
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A Small and High-Speed Driving Mechanism for 3D Shape Measurement in Monocular Endoscopy
Sensors, 2021 Three-dimensional (3D) shape acquisition has been widely introduced to enrich quantitative analysis with the combination of object shape and texture, for example, surface roughness evaluation in industry and gastrointestinal endoscopy in medicine.
Yoshikazu Nakajima +4 more
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3D Reconstruction of Gastrointestinal Regions Using Single-View Methods
IEEE Access, 2023 Capsule endoscopy is about to become an alternative to traditional colonoscopy. One uses a wireless camera to visualize the gastrointestinal (GI) tract. A 3D model based on image sequences obtained from wireless capsule endoscopy (WCE) can be helpful to ...
Bilal Ahmad +3 more
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Sampling-Noise Modeling & Removal in Shape From Focus Systems Through Kalman Filter
IEEE Access, 2021 Shape from Focus (SFF) is one of the passive techniques to recover the shape of an object under consideration. It utilizes the focus cue present in the stack of images, obtained by a single camera.
Husna Mutahira +3 more
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Enhancing Focus Volume through Perceptual Focus Factor in Shape-from-Focus
Mathematics, 2023 Shape From Focus (SFF) reconstructs a scene’s shape using a series of images with varied focus settings. However, the effectiveness of SFF largely depends on the Focus Measure (FM) used, which is prone to noise-induced inaccuracies in focus values.
Khurram Ashfaq, Muhammad Tariq Mahmood
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Improving Depth Computation From Robust Focus Approximation
IEEE Access, 2019 Shape-from-focus (SFF) technique is to recover three-dimensional shape of an object from a sequence of two-dimensional images of the same object taken by gradually changing the focus settings of the imaging device. In SFF, for each pixel location (i, j),
Seong-O Shim +4 more
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Efficient graph cut optimization for shape from focus [PDF]
Journal of Visual Communication and Image Representation, 2018 Abstract Shape From Focus refers to the inverse problem of recovering the depth in every point of a scene from a set of differently focused 2D images. Recently, some authors stated it in the variational framework and solved it by minimizing a non-convex functional.
Ribal, Christophe +2 more
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Mathematical Principles of Object 3D Reconstruction by Shape-from-Focus Methods
Mathematics, 2021 Shape-from-Focus (SFF) methods have been developed for about twenty years. They able to obtain the shape of 3D objects from a series of partially focused images. The plane to which the microscope or camera is focused intersects the 3D object in a contour
Dalibor Martišek, Karel Mikulášek
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Optimizing Image Focus for Shape From Focus Through Locally Weighted Non-Parametric Regression
IEEE Access, 2019 Shape from focus is a passive optical technique that uses multiple images with different focus levels. To compute the sharpness of each pixel in the image sequence, obtained by translating the object plane at a constant step size along the optical axis ...
Hoon-Seok Jang +2 more
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Shape from Focus Algorithm Based on Spreading [PDF]
Jisuanji gongcheng, 2016 Shape from Focus(SFF) is a layer scanning technology,which reguires a lot of memory of upper computer when mehshring.To solve this problem,an algorithm based on spreading is proposed.Based on the interval property of the focus evaluation curve and the ...
KANG Yu,CHEN Niannian,FAN Yong,WANG Li,YANG Wei
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