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Reference velocity selection by a generalized Lloyd method
SEG Technical Program Expanded Abstracts 2004, 2004SUMMARY Downward continuation methods require the selection of one or more references velocities. How many, and which, reference velocities are selected affects performance and image quality. The velocity selection problem can be treated as a quantization problem. Applying a modied version of Lloyd’s algorithm to select the reference velocities results
R. Clapp
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Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 2018
Delicate control of the initial polarization states of sub-beams incident to the interferometer unit in multibeam Lloyd's mirror interference lithography is of great significance for the fabrication of high-precision two-dimensional (2D) scale gratings.
Xiuguo Chen +4 more
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Delicate control of the initial polarization states of sub-beams incident to the interferometer unit in multibeam Lloyd's mirror interference lithography is of great significance for the fabrication of high-precision two-dimensional (2D) scale gratings.
Xiuguo Chen +4 more
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Optics and lasers in engineering, 2018
A new fibre optic Lloyd’s mirror method is developed for extracting 3-D height distribution of various objects at the micron scale with a resolution of 4 µm. The fibre optic assembly is elegantly integrated to an optical microscope and a CCD camera.
Arda Inanc +3 more
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A new fibre optic Lloyd’s mirror method is developed for extracting 3-D height distribution of various objects at the micron scale with a resolution of 4 µm. The fibre optic assembly is elegantly integrated to an optical microscope and a CCD camera.
Arda Inanc +3 more
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An Effective and Efficient Algorithm for K-Means Clustering With New Formulation
IEEE Transactions on Knowledge and Data Engineering, 2023K-means is one of the most simple and popular clustering algorithms, which implemented as a standard clustering method in most of machine learning researches.
F. Nie, Ziheng Li, Rong Wang, Xuelong Li
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Research on Lloyd-Max Quantizer with Two-Stage Otsu’s Method
Applied Mechanics and Materials, 2014Otsu’s method is often used in image segmentation applications such as defect detections, medical image diagnosis and object shape recognitions. However it is very time-consuming for multilevel segmentation. Lloyd-Max quantizer is a popular and efficient data compressor.
Ping Sung Liao, Chein Hua Lee
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An adaptive and deterministic method for initializing the Lloyd-Max algorithm
SPIE Proceedings, 2012Gray-level quantization (reduction) is an important operation in image processing and analysis. The Lloyd- Max algorithm (LMA) is a classic scalar quantization algorithm that can be used for gray-level reduction with minimal mean squared distortion. However, the algorithm is known to be very sensitive to the choice of initial centers. In this paper,
Jared Vicory, M. Emre Celebi
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A practical method for stability assessment of a damaged ship
, 2021Reliable onboard stability assessment for a damaged ship is of great importance to ship operators. This paper presents a practical method to calculate ship's damage stability directly from the full three-dimensional (3D) geometric models, in which the ...
Xiaofeng Sun +4 more
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A robot on-line area coverage approach based on the probabilistic Lloyd method
The 2013 International Joint Conference on Neural Networks (IJCNN), 2013Area Coverage is a standard problem in which Robotics techniques can be applied. An approach to solve this problem is through techniques based on Centroidal Voronoi Tesselations (CVT), considering that each robot is a generator used to build Voronoi polygons.
Murillo Rehder Batista +2 more
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On the Sequential Convergence of Lloyd’s Algorithms
Mathematics of Operations ResearchLloyd’s algorithm is an iterative method that solves the quantization problem, that is, the approximation of a target probability measure by a discrete one, and is particularly used in digital applications. This algorithm can be interpreted as a gradient
Leo Portales +2 more
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SPIE Proceedings, 2014
Today, both military and civilian applications require miniaturized and cheap optical systems. One way to achieve this trend consists in decreasing the pixel pitch of focal plane arrays (FPA). In order to evaluate the performance of the overall optical systems, it is necessary to measure the modulation transfer function (MTF) of these pixels.
Guillaume Druart +7 more
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Today, both military and civilian applications require miniaturized and cheap optical systems. One way to achieve this trend consists in decreasing the pixel pitch of focal plane arrays (FPA). In order to evaluate the performance of the overall optical systems, it is necessary to measure the modulation transfer function (MTF) of these pixels.
Guillaume Druart +7 more
openaire +1 more source