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Auteur Hoon Sohn |
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Development of a mixed pixel filter for improved dimension estimation using AMCW laser scanner / Qiang Wang in ISPRS Journal of photogrammetry and remote sensing, vol 119 (September 2016)
[article]
Titre : Development of a mixed pixel filter for improved dimension estimation using AMCW laser scanner Type de document : Article/Communication Auteurs : Qiang Wang, Auteur ; Hoon Sohn, Auteur ; Jack C.P. Cheng, Auteur Année de publication : 2016 Article en page(s) : pp 246 - 258 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] classification pixellaire
[Termes IGN] données localisées 3D
[Termes IGN] filtre numérique
[Termes IGN] métrologie dimensionelle
[Termes IGN] précision des mesuresRésumé : (Auteur) Accurate dimension estimation is desired in many fields, but the traditional dimension estimation methods are time-consuming and labor-intensive. In the recent decades, 3D laser scanners have become popular for dimension estimation due to their high measurement speed and accuracy. Nonetheless, scan data obtained by amplitude-modulated continuous-wave (AMCW) laser scanners suffer from erroneous data called mixed pixels, which can influence the accuracy of dimension estimation. This study develops a mixed pixel filter for improved dimension estimation using AMCW laser scanners. The distance measurement of mixed pixels is firstly formulated based on the working principle of laser scanners. Then, a mixed pixel filter that can minimize the classification errors between valid points and mixed pixels is developed. Validation experiments were conducted to verify the formulation of the distance measurement of mixed pixels and to examine the performance of the proposed mixed pixel filter. Experimental results show that, for a specimen with dimensions of 840 mm × 300 mm, the overall errors of the dimensions estimated after applying the proposed filter are 1.9 mm and 1.0 mm for two different scanning resolutions, respectively. These errors are much smaller than the errors (4.8 mm and 3.5 mm) obtained by the scanner’s built-in filter. Numéro de notice : A2016-784 Affiliation des auteurs : non IGN Autre URL associée : Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2016.06.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2016.06.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82497
in ISPRS Journal of photogrammetry and remote sensing > vol 119 (September 2016) . - pp 246 - 258[article]