Image processing and synthesis for extended depth of field of optical microscopes |
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Authors: | Kazufumi Kaneda Shohei Ishida Akira Ishida Eihachiro Nakamae |
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Affiliation: | (1) Faculty of Engineering, Hiroshima University, 4-1 Kagamiyama 1 chome, 724 Higashi-hiroshima, Japan;(2) Matushita Electric Industrial Co., Ltd., 8th Floor, Twin 21 National Tower, 1-61, 2-chome, Shiromi, Chuo-ku, 540 Osdaka, Japan |
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Abstract: | An optimal microscope is useful for observing various kinds of samples. However, precise observation of an extended region in depth is difficult, because of the narrow range of depth of focus. To overcome this problem, this paper proposes a method of obtaining a pan-focused stereoscopic image. By using image processing, in-focus areas are extracted from multiple images focused on slightly different depths, and a stereoscopic image is composed with these in-focus areas. The proposed method is applied to the observation of three-dimensional distributions of soil particles, a common problem in the field of civil engineering, and the usefulness of the proposed method is demonstrated. |
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Keywords: | Optical microscope image Depth of focus Pan-focused image Multiple image processing Pillar-shaped voxel |
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