TITLE

Estimating Illumination Distribution to Generate Realistic Shadows in Augmented Reality

AUTHOR(S)
Changkyoung Eem; Iksu Kim; Yeongseok Jung; Hyunki Hong
PUB. DATE
June 2015
SOURCE
KSII Transactions on Internet & Information Systems;Jun2015, Vol. 9 Issue 6, p2289
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Mobile devices are becoming powerful enough to realize augmented reality (AR) application. This paper introduces two AR methods to estimate an environmental illumination distribution of a scene. In the first method, we extract the lighting direction and intensity from input images captured with a front-side camera of a mobile device, using its orientation sensor. The second method extracts shadow regions cast by three dimensional (3D) AR marker of known shape and size. Because previous methods examine per pixel shadow intensity, their performances are much affected by the number of sampling points, positions, and threshold values. By using a simple binary operation between the previously clustered shadow regions and the threshold real shadow regions, we can compute efficiently their relative area proportions according to threshold values. This area-based method can overcome point sampling problem and threshold value selection. Experiment results demonstrate that the proposed methods generate natural image with multiple smooth shadows in real-time.
ACCESSION #
103701496

 

Related Articles

  • Developing a Mobile Learning System in Augmented Reality Context. Da-Ren Chen; Mu-Yen Chen; Tien-Chi Huang; Wen-Pao Hsu // International Journal of Distributed Sensor Networks;2013, p1 

    In recent years, many emerging information technologies have been applied to learning environments in an attempt to overcome drawbacks associated with traditional teaching environments. Some of these technologies have been shown to improve learning outcomes and learning motivation. Advances in...

  • WS-DAI-DM: An Interface Specification for Data Mining in Grid Environments. Yan Zhang; Luoming Meng; Honghui Li; Woehrer, Alexander; Brezany, Peter // Journal of Software (1796217X);Jun2011, Vol. 6 Issue 6, p953 

    Providing the appropriate access means for data mining services in Grid Environment is principal for combination of Grid and data mining. The transition from centralized data mining process as they are in traditional tools to Grid-compliant and Grid-based data mining services that can coordinate...

  • CAViz, an Interactive Graphical Tool for Image Mining. Pham, Nguyen-Khang; Morin, Annie; Gros, Patrick // Journal of Computing & Information Technology;Dec2008, Vol. 16 Issue 4, p295 

    We propose an interactive graphical tool, CAViz, which allows us to display and to extract knowledge from the results of a Correspondence Analysis CA on images. CA is a descriptive technique designed to analyze simple two-way and multi-way tables containing some measure of correspondence between...

  • Has Large-Scale Named-Entity Network Analysis Been Resting on a Flawed Assumption? Fegley, Brent D.; Torvik, Vetle I. // PLoS ONE;Jul2013, Vol. 8 Issue 7, p1 

    The assumption that a name uniquely identifies an entity introduces two types of errors: splitting treats one entity as two or more (because of name variants); lumping treats multiple entities as if they were one (because of shared names). Here we investigate the extent to which splitting and...

  • Enrich Your Experience With a New App.  // Modern Casting;Jun2013, Vol. 103 Issue 6, p4 

    The article reports that the magazine is launching a reader experience called augmented reality, wherein readers, with the use of their mobile device can scan certain pages of the magazine for additional content.

  • A simple analytic solution for the perspective-3-point problem. Ma De-yi; Chen Yi-min; Huang Chen; Yan Yu-ruo // International Journal of Digital Content Technology & its Applic;Jun2013, Vol. 7 Issue 10, p129 

    To get exterior parameters of camera, including rotation matrix and translation matrix, on the basis of n counter points, is PnP problem. PnP problem is one of the key problems in camera calibration, photogrammetry and so on. This paper proposes a simple analytic solution for the...

  • Proactive Location Service in Mobility Management. Yu Liu; Qiang Shen; ZhiJun Zhao; Hui Tang // Journal of Networks;Apr2011, Vol. 6 Issue 4, p670 

    This paper proposes a new proactive mobility management mechanism. Instead of traditional mobility management system that when a user wants to connect another it needs to lookup the current location of the called user from the remote home location register (HLR) of the called user, the proposed...

  • Mobile social group sizes and scaling ratio. Phithakkitnukoon, Santi; Dantu, Ram // AI & Society;Feb2011, Vol. 26 Issue 1, p71 

    Social data mining has become an emerging area of research in information and communication technology fields. The scope of social data mining has expanded significantly in the recent years with the advance of telecommunication technologies and the rapidly increasing accessibility of computing...

  • A Dozen Reflections on Clouds, Mobility and More. Bernstein, Corinne // Channel Insider;8/21/2014, p1 

    The article reports on the primary trends that brought changes to the information technology (IT) sector in August 2014. Noted are the challenges and opportunities attributed to big data, mobility, cloud computing and other changers to the IT sector. Information on the annual ChannelCon...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics