Physics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ehac....2..295s&link_type=abstract
In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 295-305 (SEE N
Physics
6
Comet Nuclei, Halley'S Comet, Image Processing, Satellite Television, Vega Project, Gas Jets, Image Enhancement, Image Reconstruction, Noise Reduction, Textures
Scientific paper
About 50 pictures of comet Halley, taken by Vega-1 and Vega-2 spacecraft during the approach from 500 to 8000 km were subjected to multistage processing. The processing stages involved image restoration and noise reduction, nucleus region detection, nucleus shape and size evaluation, jet extraction, and surface structure enhancement. The results of the successive procedures for image restoration and noise removal (in the brightness and spatial-frequency domain) are given. Different approaches and the algorithms concerned for nucleus region detection, and identification of the limbs not obscured by the jets are described. Taking into consideration a set of located limb edges, the nucleus shape and size are evaluated. The texture enhancement of the nucleus surface is discussed.
Avanesov G. A.
Krasikov V. A.
Kuzmin Alexei
Merényi Erzsébet
Sagdeev Roal'd. Z.
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