Digital image processing techniques for color flow-visualization photograph.
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- FUJIWARA Tadao
- 岡山大学工学部
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- NISHIHARA Shuji
- 住友重機械工業株式会社
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- HIROSE Koji
- 岡山大学工学部
Bibliographic Information
- Other Title
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- カラー可視化写真の画像処理方法
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Abstract
Color flow-visualization photography and digital image processing techniques have been developed for the purpose of flow measurement in the flow field of a circular vessel with recirculation flow. The path-lines of aluminum powder were photographed on a color reversal film by illuminating it in red, white, and green in turn within an exposure time. The pixel values in red, green, and blue for 256 steps prepared by the drum-scanner as the digital image data of the film, the resultant stimulus and the trichromatic coordinates of each pixel were evaluated from them. The pixels for path-lines were distinguished from the background by the threshold-level of resultant stimulus, and their colors were determined by using the principal component obtained from combined and standardized residuals for the regression formulas of trichromatic coordinates. The velocity vectors can be derived from both the location and color of pixels, and the time interval of white color illumination.
Journal
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- JOURNAL OF THE FLOW VISUALIZATION SOCIETY OF JAPAN
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JOURNAL OF THE FLOW VISUALIZATION SOCIETY OF JAPAN 8 (28), 32-38, 1988
THE VISUALIZATION SOCIETY OF JAPAN
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Keywords
Details 詳細情報について
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- CRID
- 1390001204620084992
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- NII Article ID
- 110002494144
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- NII Book ID
- AA10680596
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- ISSN
- 18840361
- 02873605
- 09148817
- http://id.crossref.org/issn/09148817
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed