| Project/Area Number |
14350220
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Osaka University |
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Principal Investigator |
OKUYAMA Masanori Osaka University, Graduate School of Engineering Science, Professor, 大学院・基礎工学研究科, 教授 (60029569)
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| Co-Investigator(Kenkyū-buntansha) |
NODA Minoru Osaka University, Graduate School of Engineering Science, Associate Professor, 大学院・基礎工学研究科, 助教授 (20294168)
YAMASHITA Kaoru Osaka University, Graduate School of Engineering Science, Assistant Professor, 大学院・基礎工学研究科, 助手 (40263230)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥14,500,000 (Direct Cost: ¥14,500,000)
Fiscal Year 2003: ¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 2002: ¥7,900,000 (Direct Cost: ¥7,900,000)
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| Keywords | Spectral image / Differential spectrum / Differential imaging / Characteristic Extraction / Modulation imaging |
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| Research Abstract |
The wavelength-differential imaging process has been theoretically analyzed by spectral simulation using the transmission spectra of the interferometer, sensitivity spectra of RGB cells of CCD and reflection spectrum of an object. The color of each pixel on the obtained wavelength-differential image is calculated using the spectra shown above and simulated image is reconstructed. For an example of gerbera petals, the simulated image was very close to the real wavelength-differential image.
Other types of modulated differential imaging system has been developed; fluorescent-and polarization-modulation imaging system. The fluorescent-modulation imaging system provided clear fluorescent images such as chlorophyll and stamp on note even in normal bright room. The polarization-modulation imaging system selectively separated a transparent image and a reflection image from the image shown on and through a glass window.
The differential-spectral imaging system has been improved into a real-time system using narrow band-pass filters (interference filters) and the dual view optics by which one can observe simultaneously two images through different optical paths from an object. The new system can even take the differential-spectral images of moving objects or objects which change their spectral characteristics with time. Change of deoxidization of human blood has been monitored over time using the system. When the blood stream of a wrist is stopped by banding, the vein near the surface of the hand must be filled with deoxyhemoglobin. The system has visualized change of the spread of deoxyhemoglobin.
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