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On the Texture Angle Detection Used in Space-Time Image Velocimetry (STIV)
http://hdl.handle.net/2237/27352
http://hdl.handle.net/2237/2735277b2d7f0-970b-4227-bf17-7bc669dc8964
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-02-01 | |||||
タイトル | ||||||
タイトル | On the Texture Angle Detection Used in Space-Time Image Velocimetry (STIV) | |||||
言語 | en | |||||
著者 |
Tsubaki, Ryota
× Tsubaki, Ryota |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | © 2017 American Geophysical Union | |||||
抄録 | ||||||
内容記述 | The space-time image velocimetry (STIV) method evaluates the velocity of a water surface by analyzing a texture angle within a space-time image (STI) obtained from an image sequence of the flowing water's surface. The brightness gradient tensor (BGT) has been utilized for calculating the texture angle of the STI within the original STIV. The BGT is sensitive to image quality, especially high-frequency noise, and this fact limits the capability and accuracy of the velocity estimation. The objectives of this study were to understand why the BGT is sensitive to high-frequency noise and how to resolve this defect. In the manuscript, derivation of the BGT is first reviewed and then a geometric representation of the BGT is discussed. The reason the BGT is sensitive to high-frequency noise is also discussed, and, then, based on geometric representations of the BGT, a measure to improve this defect is proposed. To demonstrate differences between the two methods, texture angles from artificial and field image sets were also analyzed using the BGT and the improved BGT. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Wiley | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1002/2017WR021913 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0043-1397 | |||||
書誌情報 |
en : Water Resources Research 巻 53, 号 12, p. 10908-10914, 発行日 2017-12 |
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著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://doi.org/10.1002/2017WR021913 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/27352 | |||||
識別子タイプ | HDL |