Results 61 to 70 of about 2,213,168 (246)

Spatial Image Gradient Estimation From the Diffusion MRI Profile

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose In the course of diffusion, water molecules encounter varying values for the relaxation‐time properties of the underlying tissue. This factor, which has rarely been accounted for in diffusion MRI (dMRI), is modeled in this work, allowing for the estimation of the gradient of relaxation‐time properties from the dMRI signal. Methods With
Iman Aganj, Thorsten Feiweier, John E. Kirsch, Bruce R. Fischl, Andre J. van der Kouwe   +4 more
wiley   +1 more source

SETI: The transmission rate of radio communication and the signal's detection

, 2011
The transmission rate of communication between radio telescopes on Earth and extraterrestrial intelligence (ETI) is here calculated up to distances of 1000 light years. Both phase-shift-keying (PSK) and frequency-shift keying (FSK) modulation schemes are
Fridman, P. A.
core   +1 more source

Skew detection and correction of mushaf Al-Quran script using hough transform [PDF]

, 2018
Document skew detection and correction is mainly one of base preprocessing steps in the document analysis. Correction of the skewed scanned images is critical because it has a direct impact on image quality.
Al-Mhiqani, Mohammed Nasser, Azmi, Mohd Sanusi, Bafjaish, Salem Saleh, Mahdin, Hairulnizam, Radzid, Amirul Ramzani   +4 more
core   +1 more source

Hough transform network

Electronics Letters, 1999
A two-layered Hough transform network is proposed which accepts image co-ordinates as the input and learns the parametric forms of the lines in the image adaptively. It provides an efficient representation of visual information embedded in the connection weights.
J. Basak, S.K. Pal
openaire   +1 more source

GraphReco: Probabilistic Structure Recognition for Chemical Molecules

ChemistryOpen, EarlyView.
Molecule structure images are unfriendly for machine understanding, blocking productivity improvements in chemical data mining, drug discovery, and many other fields. We present a rule‐based probabilistic Optical Chemical Structure Recognition model to explain and tackle the ambiguity challenges in graph assembly.
Haidong Wang, Yuncheng Yu, Jyh‐Charn Liu   +2 more
wiley   +1 more source

AERIAL IMAGERY AND LIDAR DATA FUSION FOR UNAMBIGUOUS EXTRACTION OF ADJACENT LEVEL-BUILDINGS’ FOOTPRINTS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Our paper aims to present a new approach to identify and extract building footprints using aerial images and LiDAR data. Employing an edge detector algorithm, our method first extracts the outer boundary of buildings, and then by taking advantage of ...
S. Mola Ebrahimi, H. Arefi, H. Rasti Veis   +2 more
doaj   +1 more source

A Novel Gradient-Weighted Voting Approach for Classical and Fuzzy Circular Hough Transforms and Their Application in Medical Image Analysis—Case Study: Colonoscopy

Applied Sciences, 2023
Classical circular Hough transform was proven to be effective for some types of colorectal polyps. However, the polyps are very rarely perfectly circular, so some tolerance is needed, that can be ensured by applying fuzzy Hough transform instead of the ...
Raneem Ismail, Szilvia Nagy
doaj   +1 more source

Wide parameter search for isolated pulsars using the Hough transform

, 2005
We use the Hough transform to analyze data from the second science run of the LIGO interferometers, to look for gravitational waves from isolated pulsars. We search over the whole sky and over a large range of frequencies and spin-down parameters.
Badri Krishnan, Cutler C Gholami I Krishnan B, Hough P V C, Hough P V C, Mohanty S D, the LIGO Scientific Collaboration   +5 more
core   +1 more source

Toward a Framework for Understanding Localization in Its Institutional Context: A Systems Perspective for Incorporating Local Values

Public Administration and Development, EarlyView.
ABSTRACT This paper explores how we might integrate local traditional values into a systems approach for analyzing and maximizing localization in the context of foreign aid. The paper situates localization and its operationalization in the older and broader literature on the political economy of foreign aid.
Jennifer M. Brinkerhoff
wiley   +1 more source

Time-frequency Analysis of Multicomponent LFM signal based on Hough and Chirplet Transform

MATEC Web of Conferences, 2018
The Chirplet Transform (CT) is effective in the characterization of IF for mono-component linear-frequency-modulated signal. However, During the initialization process, using the peak of the time-frequency map of the short-time Fourier transform to fit ...
Zhang Xueqin, Liu Ruolun
doaj   +1 more source