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An experimental comparison of directly and indirectly derived modulation transfer functions / Chia-Hsiang Yang in Photogrammetric record, vol 30 n° 149 (March - May 2015)  

Public [article]  inPhotogrammetric record > vol 30 n° 149 (March - May 2015) . - pp 100 - 114 Titre : An experimental comparison of directly and indirectly derived modulation transfer functions Type de document : Article/Communication Auteurs : Chia-Hsiang Yang, Auteur ; Shue-Chia Wang, Auteur ; Peter T. Y. Shih, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 100 - 114 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] estimation de précision [Termes IGN] étalement radiométrique [Termes IGN] fonction de transfert de modulation Résumé : (Auteur) The modulation transfer function (MTF) is the indicator most frequently used for image resolution assessment. Traditionally in photogrammetry, the MTF is directly estimated using specifically designed targets such as the USAF 1952 three-bar resolution test target, but it can also be indirectly derived from the system degradation function known as the point-spread function (PSF). Theoretically, MTF and PSF are related through a spatial–frequency domain transformation (a Fourier transformation), meaning the same attributes are expressed in different domains. When using real images, however, it is not clear whether these two functions produce the same result. In this study, both spatial and frequency domain approaches were experimentally compared through simulations. Results show that the MTF derived from the PSF has better accuracy than an MTF estimated directly from the resolution target. Numéro de notice : A2015-365 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12098 Date de publication en ligne : 13/03/2015 En ligne : https://doi.org/10.1111/phor.12098 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76802 [article]

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