Book ChapterDOI
Visual Positioning in a Smartphone
Laura Ruotsalainen,Heidi Kuusniemi +1 more
- pp 130-158
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TLDR
In this chapter, after introducing methods of image processing related to feature extraction, applicable methods for visual positioning are discussed with state-of-the-art examples.Abstract:
Numerous techniques for obtaining motion and location related information are needed for obtaining seamless positioning capability with smartphones. High-quality cameras are nowadays widely available in portable devices and can provide necessary redundant data about the user’s surroundings in addition to the other sensors usable for positioning purposes. In this chapter, after introducing methods of image processing related to feature extraction, applicable methods for visual positioning are discussed with state-of-the-art examples. Regardless whether the visual-based positioning is based on reference images in a database or using information obtained from consecutive images, the first steps of pre-processing are similar to obtain noiseless images for accurate calculations and to retrieve the required camera parameters. Smartphones have limited computational resources and that restricts the methods available for image processing. To carry out the visual positioning function, features in images are either matched to corresponding features in consecutive images, or to a database. Obtaining the location can be performed with matching the query image to a database of reference images equipped with location information. Alternatively, the attitude and position change can be resolved from consecutive images to provide localization augmentation that may be fused with other sensor information. When smartphones are concerned, the restricted resources however bring about challenges that are the focus in this chapter. DOI: 10.4018/978-1-4666-1827-5.ch006read more
Citations
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Journal ArticleDOI
Integration of vulnerable road users in cooperative ITS systems
TL;DR: An architecture for the integration of Vulnerable Road Users (VRUs) in Cooperative ITS systems and the requirements for VRU devices are developed, including awareness of the presence of VRUs near potentially dangerous situations, and collision risk warning, based on trajectories of the road users.
Book
Intelligent Computer Vision and Image Processing: Innovation, Application, and Design
TL;DR: Intelligent Computer Vision and Image Processing: Innovation, Application, and Design provides methods and research on various disciplines related to the science and technology of machines.
Book ChapterDOI
Navigation Based on Sensors in Smartphones
Allison Kealy,Guenther Retscher +1 more
TL;DR: The technologies and techniques discussed here include the fusion of inertial navigation and other sensors, positioning based on signals from wireless networks, image-based methods, cooperative positioning systems, and map matching.
Journal ArticleDOI
Indoor Navigation—User Requirements, State-of-the-Art and Developments for Smartphone Localization
TL;DR: In this article , a review of the state-of-the-art in system development for smartphone localization is discussed, in particular, localization with current and upcoming signals of opportunity (SoP) for use in mobile devices.
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