Results 101 to 110 of about 1,174,545 (317)

Image enhancement using vector quantisation based interpolation [PDF]

, 2007
We present a novel method of image expansion using vector quantisation. The algorithm is inspired by fractal coding and uses a statistical model of the relationship between details at different scales of the image to interpolate detail at one octave ...
Balasuriya, S.L., Cockshott, W.P., Gunawan, I.P., Siebert, J.P., J. P. Siebert, W. P. Cockshott, S. L. Balasuriya, I. P. Gunawan   +7 more
core   +1 more source

Quality Assessment of Stereoscopic Images

EURASIP Journal on Image and Video Processing, 2008
Several metrics have been proposed in literature to assess the perceptual quality of two-dimensional images. However, no similar effort has been devoted to quality assessment of stereoscopic images. Therefore, in this paper, we review the different issues related to 3D visualization, and we propose a quality metric for the assessment of stereopairs ...
Benoit, Alexandre, Le Callet, Patrick, Campisi, Patrizio, Cousseau, Romain   +3 more
openaire   +6 more sources

Modulation of Homer1 EVH1 domain internal dynamics by putative autism‐associated mutations

FEBS Letters, EarlyView.
The putative autism‐associated M65I and S97L variants of the EVH1 domain of the postsynaptic scaffold protein Homer1 do not exhibit substantial changes in their overall structure or partner binding. Both of them, but especially the M65I variant, show altered internal dynamics relative to the wild‐type domain on the μs‐ms timescale, indicated by the ...
Fanni Farkas, Brigitta Maruzs, Zsófia E. Kálmán, Tomas Klumpler, Gyula Batta, Bálint Péterfia, Zoltán Gáspári   +6 more
wiley   +1 more source

Image resolution enhancement using dual-tree complex wavelet transform [PDF]

, 2010
In this letter, a complex wavelet-domain image resolution enhancement algorithm based on the estimation of wavelet coefficients is proposed. The method uses a forward and inverse dual-tree complex wavelet transform (DT-CWT) to construct a high-resolution
Tjahjadi, Tardi, Çelik, Turgay
core   +1 more source

Changes in subclinical cardiac abnormalities 1 Year after recovering from COVID-19 in patients without clinical cardiac findings

Heliyon
Aim: To evaluate the subclinical cardiac involvement in COVID-19 patients without clinical cardiac evidence using cardiac MR imaging. Material and methods: Participants recovered from COVID-19 without cardiac symptoms and no cardiovascular medical ...
Haitao Wang, Wei Deng, Yang Zhang, Jinxiu Yang, Zhen Wang, Bin Liu, Yuchi Han, Yongqiang Yu, Ren Zhao, Xiaohu Li   +9 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Differences in myocardial involvement between new onset and longstanding systemic lupus erythematosus patients assessed by cardiovascular magnetic resonance

European Journal of Radiology Open
Objectives: Subclinical myocardial involvement is common in systemic lupus erythematosus (SLE), but differences between new onset and longstanding SLE are not fully elucidated.
Zhen Wang, Xing Tang, Chaohui Hang, Hui Gao, Jinxiu Yang, Yuchi Han, Yongqiang Yu, Zongwen Shuai, Ren Zhao, Xiaohu Li   +9 more
doaj   +1 more source

Quality enhancement in image enlargement [PDF]

, 1995
Interpolation methods, usually employed in image enlargement, cause a degradation of the image quality in proximity to the edges. In fact, the best interpolation leads to fuzziness effects often due to the image features ignored during the process. In order to have a contained definition loss after the enlargement operation, it is necessary to consider
MARINO, Francescomaria, MASTRONARDI, Giuseppe   +1 more
openaire   +2 more sources

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source

Image fusion in the JPEG 2000 domain [PDF]

, 2006
This paper presents a novel approach to image fusion in the JPEG 2000 domain. In this scheme, compressed images are fused without the need for full decompression. The proposed method can be integrated with the existing JPEG 2000 tools.
Canga, EF, Canagarajah, CN, Bull, DR
core   +1 more source