A STUDY ON VIVIDNESS OF UNDERWATER OPTICAL MICROSCOPE IMAGE WITH HIGH MAGNIFICATION AND STEREOSCOPIC DISPLAY SYSTEM

点击翻译按钮获取中文摘要

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.