Results 21 to 30 of about 58,364 (303)

Fast Compressed Sensing of 3D Radial T1 Mapping with Different Sparse and Low-Rank Models

open access: yesJournal of Imaging, 2023
Knowledge of the relative performance of the well-known sparse and low-rank compressed sensing models with 3D radial quantitative magnetic resonance imaging acquisitions is limited.
Antti Paajanen   +5 more
doaj   +1 more source

Segmented Multistage Reconstruction of Magnetic Resonance Images

open access: yesAdvances in Electrical and Computer Engineering, 2021
Compressed sensing of magnetic resonance imaging refers to the reconstruction of magnetic resonance images from partially sampled k-space data. The k-space data reduces reconstruction processing time but at the cost of increasing artifacts - especially
FARIS, M.   +3 more
doaj   +1 more source

Steganalysis of Compressed Speech Based on Association Rule Mining

open access: yesIEEE Access, 2022
Currently, steganography based on compressed speech streams is gathering more and more attention. Meanwhile, it poses a huge threat to cyber security.
Feipeng Gao, Jie Yang, Peng Xu
doaj   +1 more source

Subpath Queries on Compressed Graphs: A Survey

open access: yesAlgorithms, 2021
Text indexing is a classical algorithmic problem that has been studied for over four decades: given a text T, pre-process it off-line so that, later, we can quickly count and locate the occurrences of any string (the query pattern) in T in time ...
Nicola Prezza
doaj   +1 more source

The Compressed Overlap Index

open access: yesCoRR, 2017
For analysing text algorithms, for computing superstrings, or for testing random number generators, one needs to compute all overlaps between any pairs of words in a given set. The positions of overlaps of a word onto itself, or of two words, are needed to compute the absence probability of a word in a random text, or the numbers of common words shared
Rodrigo Cánovas   +2 more
openaire   +2 more sources

Cone index after mechanized harvesting of sugarcane in the North Fluminense

open access: yesVértices, 2014
This study aimed at evaluating the cone index, in depths of 0 to 0.3 m after mechanized harvesting of green sugarcane using the harvester Case A8800 and Case A4000 in the North-Fluminense region of Rio de Janeiro State.
Carmen Maria Coimbra Manhães   +4 more
doaj   +1 more source

Two-Layer Reversible Data Hiding for VQ-Compressed Images Based on De-Clustering and Indicator-Free Search-Order Coding

open access: yesFuture Internet, 2021
During transmission of digital images, secret messages can be embedded using data hiding techniques. Such techniques can transfer private secrets without drawing the attention of eavesdroppers.
Chin-Chen Chang   +3 more
doaj   +1 more source

Smaller RLZ-Compressed Suffix Arrays [PDF]

open access: yes, 2021
Recently it was shown (Puglisi and Zhukova, Proc. SPIRE, 2020) that the suffix array (SA) data structure can be effectively compressed with relative Lempel-Ziv (RLZ) dictionary compression in such a way that arbitrary subarrays can be rapidly ...
Bella Zhukova   +3 more
core   +1 more source

Modular Decomposition-Based Graph Compression for Fast Reachability Detection

open access: yesData Science and Engineering, 2019
Fast reachability detection is one of the key problems in graph applications. Most of the existing works focus on creating an index and answering reachability based on that index.
Shikha Anirban   +2 more
doaj   +1 more source

Experimental Study on Measuring Petzval Image Plane of Streak Tube with Single Image

open access: yesPhotonics, 2023
In the process of image reconstruction of compressed sensing algorithms, building a measurement matrix related to the parameters of the imaging system is necessary to improve its imaging quality.
Houzhi Cai   +5 more
doaj   +1 more source

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