著者

Takayasu KITANO Yuki OTA Shigeru TANIGUCHI Koji IWATA Shota SAIKI Masayuki KITORA Akira ASANO

出版者

Railway Technical Research Institute

雑誌

Quarterly Report of RTRI (ISSN:00339008)

巻号頁・発行日

vol.61, no.2, pp.114-119, 2020-05-01 (Released:2020-05-30)

参考文献数

6

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An on-board train positioning and train integrity system combining inertial sensors and tachometer generators has been developed to detect train position and presence in a section using a radio train control system. In this system, curves and slopes which are registered as distinctive points on the track in an on-board database are used to detect train position and calculate train length. Additionally, train splitting can also be detected by the difference in acceleration between the head vehicle and the tail vehicle. Running tests using fail-safe processors equipped with these functions have demonstrated the feasibility of this system.

著者

Chie Muraki ASANO Akira ASANO Liang LI Takako FUJIMOTO

出版者

日本感性工学会

雑誌

Kansei Engineering International Journal (ISSN:18840841)

巻号頁・発行日

vol.10, no.1, pp.11-18, 2010 (Released:2011-09-16)

参考文献数

25

被引用文献数

2 3

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Since the surface texture of materials often affects human visual impressions as much as or more than the design, shape, or color properties, texture characteristics have been studied as features of object identification. We have been investigating the effect of texture on visual impression and objective identification using black fabrics that do not exhibit any effects of color. Our studies showed that visual impressions of texture correspond to complex micro-components and global structures of image features of those textures. Our results also showed that some important elements influence human visual impressions and identification of textures. Because of a variety of fibrous structures, it is not easy to provide a systematic analysis of clothing materials. Nevertheless, developing the method and collecting data on these elements and their effects using these image features will be important. To make this research applicable for wider use, we have been studying precisely what it is about an arbitrary texture that influences human visual impressions and sensibility. As a new step, in this paper, a texture is altered and transformed using the parameter estimation method of texture based on mathematical morphology, which is often used for extracting image components that are useful for representation and description. A texture is decomposed into a primitive and grain arrangement which correspond to local and global characteristics, respectively. Different textures are created by modifying the primitive and the arrangement to investigate the effects of modifications of local and global features. The relationship between the parameters and visual impressions of the modified textures were evaluated. This study shows that influence of both local and global structures of the texture along with their combinations and mutual interactions are important for identification of human visual impression.