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Statements

Subject Item
n2:RIV%2F00216305%3A26210%2F11%3APU93505%21RIV12-GA0-26210___
rdf:type
n11:Vysledek skos:Concept
dcterms:description
Images of the corona have a high dynamic range which is excellent for quantitative photometric analysis. To understand the processes governing the solar corona, it is essential to have information about the absolute brightness as well as the underlying structure. However, due to the steep radial gradient of brightness in the images, and to the fact that structures closer to the solar disk have higher contrast than structures further from the disk, human vision cannot view the intricate structure of the corona in such images. The recently developed normalizing-radial-graded filter (NRGF) is an effective way for revealing the coronal structure. In this work, we present a more adaptive filter inspired by the NRGF, which we call the Fourier normalizing-radial-graded filter (FNRGF). It approximates the local average and the local standard deviation by a finite Fourier series. This method enables the enhancement of finer details, especially in regions of lower contrast. We also show how the influence of add Images of the corona have a high dynamic range which is excellent for quantitative photometric analysis. To understand the processes governing the solar corona, it is essential to have information about the absolute brightness as well as the underlying structure. However, due to the steep radial gradient of brightness in the images, and to the fact that structures closer to the solar disk have higher contrast than structures further from the disk, human vision cannot view the intricate structure of the corona in such images. The recently developed normalizing-radial-graded filter (NRGF) is an effective way for revealing the coronal structure. In this work, we present a more adaptive filter inspired by the NRGF, which we call the Fourier normalizing-radial-graded filter (FNRGF). It approximates the local average and the local standard deviation by a finite Fourier series. This method enables the enhancement of finer details, especially in regions of lower contrast. We also show how the influence of add
dcterms:title
ENHANCING CORONAL STRUCTURES WITH THE FOURIER NORMALIZING-RADIAL-GRADED FILTER ENHANCING CORONAL STRUCTURES WITH THE FOURIER NORMALIZING-RADIAL-GRADED FILTER
skos:prefLabel
ENHANCING CORONAL STRUCTURES WITH THE FOURIER NORMALIZING-RADIAL-GRADED FILTER ENHANCING CORONAL STRUCTURES WITH THE FOURIER NORMALIZING-RADIAL-GRADED FILTER
skos:notation
RIV/00216305:26210/11:PU93505!RIV12-GA0-26210___
n11:predkladatel
n14:orjk%3A26210
n3:aktivita
n8:P
n3:aktivity
P(GA205/09/1469)
n3:cisloPeriodika
2
n3:dodaniDat
n17:2012
n3:domaciTvurceVysledku
n10:1800612
n3:druhVysledku
n13:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
197617
n3:idVysledku
RIV/00216305:26210/11:PU93505
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Sun: corona, techniques: image processing
n3:klicoveSlovo
n5:techniques%3A%20image%20processing n5:Sun%3A%20corona
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[0629FA200B37]
n3:nazevZdroje
ASTROPHYSICAL JOURNAL
n3:obor
n15:BN
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n4:GA205%2F09%2F1469
n3:rokUplatneniVysledku
n17:2011
n3:svazekPeriodika
737
n3:tvurceVysledku
Habbal, Shadia Rifai Druckmüllerová, Hana Morgan, Huw
n3:wos
000294013600042
s:issn
0004-637X
s:numberOfPages
10
n6:organizacniJednotka
26210