| Project/Area Number |
09650462
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
計測・制御工学
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| Research Institution | Nagoya University |
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Principal Investigator |
OHNISHI Noboru Grad.School of Eng., Nagoya Univ., Professor, 工学研究科, 教授 (70185338)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Toshimitsu Computation Center, Nagoya Univ., Asssoc.Professor, 大型計算機センター, 助教授 (00262923)
YAMAMURA Tsuyoshi Faculty of Information Science and Technology, Aichi Prefectural Univ., Assoc.Pr, 情報科学部, 助教授 (00242826)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1998: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1997: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | reflected images / specular reflection / polarization / on-line processing |
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| Research Abstract |
We often see scenes where an object's image is reflected on window glass and overlaps with an image of another object behind the glass. This research proposed on-line methods for eliminating images reflected specularly on a smooth surface such as glass and plastic. Our methods are based on the optical property that light reflected on glass is polarized, while light transmitted through glass is less polarized. It is possible to eliminate reflected light with a polarizing filter. The polarization direction, however, changes even for planar glass and is not easily determined without information about the position and orientation of the glass and objects relative to the camera. Our method uses a series of images obtained by rotating a polarizing filter placed in front of a camera. Reflected images are removed by selecting just minimum image intensity among a series of images for each pixel. We propose two methods for estimating minimum image ; one is min-max method and the other parameter estimation method. We conducted experiments with real images and compared the performances of the two methods. As a result, we could generate high quality image without reflected images at semi-video rate of 15 frames per second for gray images and 5 frames for color images.
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