CROWD-PAN-360: 一种面向智能手机用户的众包上下文感知全景地图生成方法

      随着智能手机和位置感知服务技术及应用的快速发展，往往需要识别用户相对于周围环境的位置，而不是原始的位置坐标信息。在本文中，作者提出了一种CROWD-PAN-360 (CP360)，通过一种基于智能手机的软件系统利用众包图片生成用户所不熟悉得环境的360度全景地图。通过手动或者自动产生的标签进行标识出现在图片中的对象的逻辑位置。这种上下文感知的系统能够将用户的位置坐标与若干个智能手机的上下文（如加速度、方向）进行智能关联。CP360能够有效降低GPS定位的误差并且能够有效识别用户的环境。

Abstract—Recent advances in smartphones and location- ware services necessitate identifying logical locations of users, in terms of their surroundings, instead of raw location coordinates. In this paper, we have proposed a CROWD-PAN-360 (CP360), novel smartphone-based system to generate 360-degree panoramic map of a querying user for his unfamiliar surrounding using crowd-sourced images. The objects (logical locations) appearing in the images are identified using manually or automatically generated tags. The system is context-aware and it intelligently associates user location coordinates with several smartphone contexts, like acceleration and orientation. CP360 can significantly reduce GPS positional errors for even cheap low-end smartphones and can identify the user surroundings very efficiently. We extensively tested the system in both indoor and outdoor environments of IIT Roorkee campus using Android smartphones over a dataset of more than 6000 crowd-sourced images of nearly 70 objects (departments, hostels, cafeteria, etc.) and CP360 generates the panoramic map with an average accuracy of 92.2%.

Raychoudhury, V.; Shrivastav, S.; Sandha, S.S.; Cao, J., "CROWD-PAN-360: Crowdsourcing Based Context-Aware Panoramic Map Generation for Smartphone Users," Parallel and Distributed Systems, IEEE Transactions on, vol.26, no.8, pp.2208,2219, Aug. 1 2015

doi:10.1109/TPDS.2014.2345067

keywords:Context-aware; crowd-sourcing; location-based services; smartphone sensing

URL:http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6871426&isnumber=7155620