C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST08:09:05

2016A&A...593A..58J - Astronomy and Astrophysics, volume 593A, 58-58 (2016/9-1)

Template matching method for the analysis of interstellar cloud structure.


Abstract (from CDS):

Context. The structure of interstellar medium can be characterised at large scales in terms of its global statistics (e.g. power spectra) and at small scales by the properties of individual cores. Interest has been increasing in structures at intermediate scales, resulting in a number of methods being developed for the analysis of filamentary structures.
Aims. We describe the application of the generic template-matching (TM) method to the analysis of maps. Our aim is to show that it provides a fast and still relatively robust way to identify elongated structures or other image features.
Methods. We present the implementation of a TM algorithm for map analysis. The results are compared against rolling Hough transform (RHT), one of the methods previously used to identify filamentary structures. We illustrate the method by applying it to Herschel surface brightness data.
Results. The performance of the TM method is found to be comparable to that of RHT but TM appears to be more robust regarding the input parameters, for example, those related to the selected spatial scales. Small modifications of TM enable one to target structures at different size and intensity levels. In addition to elongated features, we demonstrate the possibility of using TM to also identify other types of structures.
Conclusions. The TM method is a viable tool for data quality control, exploratory data analysis, and even quantitative analysis of structures in image data.

Abstract Copyright: © ESO, 2016

Journal keyword(s): ISM: clouds - ISM: structure - infrared: ISM - submillimeter: ISM - techniques: image processing

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 LDN 1642 MoC 04 35 18 -14 13.9           ~ 141 0
2 NAME Musca Cld 12 23 -71.3           ~ 170 0

    Equat.    Gal    SGal    Ecl

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