Results 111 to 120 of about 16,848 (165)

Ship roll restoring moment calculation in beam sea condition

Journal of Marine Science and Technology, 2020
Accurate calculation of restoring moment, virtual mass moment of inertia and damping moment increases the accuracy of a ship’s dynamic stability simulation. The current methods of approximating the roll restoring moment are based on hydrostatic calculations. These methods fail to consider the dynamic conditions and variation of upward buoyancy and wave
Sadra Kianejad   +3 more
openaire   +1 more source

Intelligent Restoration of Historical Parametric Geometric Patterns by Zernike Moments and Neural Networks

Journal on Computing and Cultural Heritage, 2021
Historical Islamic ornaments include a fantastic treasury of geometric and mathematical algorithms. Inevitably, restoration of these ornaments in periodic patterns consisting of repeated elements has been faced following and substituting the other available similar ingredients instead of vanished parts.
Bita Hajebi, Pooya Hajebi
openaire   +1 more source

Tchebichef moment based restoration of Gaussian blurred images

Applied Optics, 2016
With the knowledge of how edges vary in the presence of a Gaussian blur, a method that uses low-order Tchebichef moments is proposed to estimate the blur parameters: sigma (σ) and size (w). The difference between the Tchebichef moments of the original and the reblurred images is used as feature vectors to train an extreme learning machine for ...
Ahlad, Kumar   +3 more
openaire   +2 more sources

Image restoration of noisy images using Tchebichef moments

Asia-Pacific Conference on Circuits and Systems, 2003
It is shown that by utilizing the method of Tchebichef (also know as Chebyshev) moments, an image degraded by Gaussian, salt-and-pepper and speckle noise can be restored. The performance of Tchebichef moments is compared with that of Zernike and Legendre moments.
P.T. Yap, P. Raveendran
openaire   +1 more source

Bending moment of implants restored with CAD/CAM polymer-based restoration materials with or without a titanium base before and after artificial aging

Dental Materials, 2022
To test and compare two types of implant systems restored with four monolithic polymer-based materials with regard to their bending moments (BM) before and after aging.A total of 192 tissue-level implants (TRI Dental Implants) differing in the presence (TiB, Octa line, n = 96) or absence (NTiB, Matrix line, n = 96) of a titanium base were restored with
Sonja, Südbeck   +5 more
openaire   +2 more sources

Defocus blurred image restoration by minimizing second-order central moment

SPIE Proceedings, 2011
A new blur identification and restoration method is presented. We observe that blurring increases the second-order central moment (SOCM) of image and introduce a new parametric blur identification method by minimizing SOCM. The method applied to finite support images, in which the scene consists of a finite extent object against a uniformly black, grey
Sheng Zhong   +3 more
openaire   +1 more source

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