著者

内舘 光 猪田 良介 辻 俊明 阿部 茂

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.129, no.6, pp.578-584, 2009-06-01 (Released:2009-06-01)

参考文献数

18

被引用文献数

2 5

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This paper proposes a real-time image processing system for wheelchair recognition at elevator lobby. This system extracts objects with frame difference method. From the image of extracted objects, heads of people are detected by the Hough transform. Vertical shooting from ceiling improves the performance of people counting since the detected head has high roundness and occlusion of people is prevented. Two feature quantities are introduced to recognize wheelchairs. They are the area value and the ratio of traveling length to vertical length. Since these quantities require a method for drawing the contour line. This paper proposes a new simple method to draw a contour line. The effectiveness of this system is confirmed through experiments.

著者

辻 俊明 猪田 良介

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.130, no.3, pp.261-267, 2010-03-01

参考文献数

15

被引用文献数

2 1

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High speed cameras have the ability to detect luminance variation due to the alternating current of illuminations. On the basis of the luminance variation, this paper proposes a method to estimate an image of when one of the illuminations is nonluminous. If the nonluminous illumination is the source of specular reflection, the estimated image only includes diffuse reflection components of other illuminations. Experimental results in various conditions show that specular reflection components are eliminated without the displacement of a camera or an illumination.