Enhancement of Solar Corona and Comet Details

Matuska, W.; Janney, D. H.; Farrell, J.A.; Keller, C. F.

doi:10.1117/12.7972301

Cited by 7 publications

(3 citation statements)

References 0 publications

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“…Similarly we did not get very good results with the general unsharp masking (Malin, 1977;Matuska et al, 1978;Larson, 1985) where a low pass filtered version of an image is subtracted from the original image. Almost in all cases the fan was completely removed, and the central condensation was too noisy to see any clear structure.…”

Section: Introductionmentioning

confidence: 72%

“…Observations, Data Reduction, and Image Processing As was mentioned above, the observations were obtained by R.E. There are several review articles dealing with the image processing techniques applied in cometary imaging (Matuska et al, 1978;Klinglesmith, 1981;Larson, 1986;A'Hearn et al, 1986;Schwarz et al, 1989;Larson and Slaughter, 1992) and in our tests we tried several of them to get more information about the structures in the inner part of fan-shaped coma. This configuration provided a scale of 0.73 arcset/pixel, and for the whole chip of the 320 x 512 pixel image the field of view reached of the 3.9 x 6.2 arcmin in size.…”

Section: Introductionmentioning

confidence: 99%

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Near-nucleus imaging of comet IRAS-Araki-Alcock 1983H1

Kubacek

Pittichová

1996

Earth Moon Planet

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Several digital image processing techniques were used to improve the visibility of details, fans and jets, in the inner coma of the comet IRAS-Araki-Alcock 1983VII on the short CCD-exposures taken by R. E. Schild with the 61-cm telescope through three I, J, and F band filters, at the Whipple Observatory during the close approach from May 6 through May 12, 1983. About 140 CCD images with the pixel size of 0.73 give a resolution about 20 km, and selected CDD frames presented together with isophotes demonstrate the variation and interrelation of the coma morphology and the nucleus activities during the observing period. Results and processed images are compared with observations taken by other observers during the same period.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Near-nucleus imaging of comet IRAS-Araki-Alcock 1983H1

Kubacek

Pittichová

1996

Earth Moon Planet

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“…There are many approaches to image enhancement that have been applied to study comets (Matuska et al 1978;Klmglesmith 1981;Larson 1986;Larson & Sekanina 1984a, 1984b, 1985Djorgovski & Spinrad 1985;Schwartz et al 1989;Larson 1991). Much useful information can be found also in papers dealing with image processing of galaxies (Arp & Loire 1976;Lorre 1978;Djorgovski 1985;Schweizer & Ford 1985;Walterbos & Kennicutt 1985).…”

Section: Observed Data and Plate Background Removal Techniquesmentioning

confidence: 99%

Digital Processing on Comets

Kubacek

Pittich

Zvolankova

1994

Symp. - Int. Astron. Union

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Several digital techniques have been used to remove large-scale background variations caused by manufacturing and technology of the photographic processing on old photographic plates ORWO ZU-21. Suppression of these large-scale background variations improved the study of large-scale phenomena in cometary plasma tails and the determination of the solar wind characteristics. The results obtained from five images of the comet Bradfield 1987 XXIX have been compared. It has been shown that the simple digital techniques used were applicable also to photographic plates with images of lesser quality. They may be utilized in the treatment of old photographic plate archives.

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