| Project/Area Number |
05452228
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
土木材料・力学一般
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
TAZAWA Eiichi HIROSHIMA UNIV., FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (60155067)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAI Kenji HIROSHIMA UNIV., FACULTY OF ENGINEERING,RESEARCH ASSOCIATE, 工学部, 助手 (90224716)
MIYAZAWA Shingo HIROSHIMA UNIV., FACULTY OF ENGINEERING,RESEARCH ASSOCIATE, 工学部, 助手 (10157638)
YONEKURA Asuo HIROSHIMA UNIV., FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (00034372)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | MICROSCOPIC OBSERVATION / OPTICAL MICROSCOPE / UNDERWATER IMAGE / GRAPHICS WORKSTATION / STEREOSCOPIC DISPLAY / LENS WHICH CAN BE IMMERSED IN LIQUID / IMAGE PROCESSING |
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| Research Abstract |
Optical microscopes have the disadvantage that only a limited depth can be focussed. In order to cope with disadvantage, the stereoscopic display system using optical microscopes has been developed in this study. That is, by using image processing techniques, focussed areas are extracted from multiple images taken on slightly different depths, and a set of stereoscopic images is then synthesized using these focussed areas. This study aims to solve problems when the system is used in practice and to reduce the speed of image processing in order to observe changes in morphology of cement minerals during hydration of cement minerals.
The time needed for extracting and processing image was able to be reduced to one third by introducing graphics workstation purchased in this study. Use of objective lens which could be immersed in liquid solved the problems of both waterproofing of abjectivelens and fixing of samples in water.Concerning fixing of samples, a box was made with silicone rubber on a slide glass before sample and water were injected into the box. By using this method, samples did not move in water during observation.
Brightness of field in optical microscope with high magnification was kept by changing 30 W of halogen lamp into 50 W of halogen lamp. Halation occurring in observation of samples was eliminated by image processing.
As a result of observing hydration process of cement minerals with defferent types of mixing water, it was clarified that speed of the system was fast enough to observe changes in morphology of calcium aluminate hydrates, while faster speed was needed in order to observe changes in morphology of calcium sulphoaluminate hydrates.
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