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CSS背景偏移技术实现网站导航菜单
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作者 王春明 《数字技术与应用》 2013年第11期171-171,共1页
本文主要介绍利用背景坐标的偏移技术,从一张背景图片上截取所需的小图标作为网站菜单项的导航图标,减少客户端从服务器下载图片的次数,从而提高服务器的性能。
关键词 背景坐标 偏移 background—position
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A Study on the Methods for Estimating the Distribution of Pedestrians in an Underground Mall by Use of Watch Cameras
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作者 TAKAGI Naoya TAKIZAWA Atsushi 《Computer Aided Drafting,Design and Manufacturing》 2015年第4期32-38,共7页
This paper shows the method of estimating spatiotemporal distribution of pedestrians by using watch cameras. We estimate the distribution without tracking technology, with pedestrian's privacy protected and in Umeda ... This paper shows the method of estimating spatiotemporal distribution of pedestrians by using watch cameras. We estimate the distribution without tracking technology, with pedestrian's privacy protected and in Umeda underground mall. Lately spatiotemporal distribution of pedestrians has being increasingly important in the field of urban planning, disaster prevention planning, marketing and so on. Although many researchers have tried to capture the information of location as dealing with some sensors, some problems still remain, such as the investment of sensors, the restriction of the number of people who has the device they are able to capture. From such background, we develop an original labelling algorithm and estimate the spatiotemporal distribution of pedestrians and the information of the passing time and the direction of pedestrians from sequential images of a watch camera. 展开更多
关键词 evacuation plan pedestrian flow underground mall indoor positioning watch cameras background subtraction
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