|
| Soft Shadow Rendering based on Real Light Source Estimation in Augmented Reality
|
|
Full
text: |
 PDF(836.7KB) |
|
|
Source |
Advances in Multimedia - An International Journal (AMIJ) |
|
Table of Contents |
|
|
Download
Complete Issue PDF(4.03MB) |
|
Volume: 1 Issue: 2 |
| |
Pages: 26-48 |
|
Publication
Date: October |
|
ISSN
(Online): 2180-1223 |
|
|
|
|
|
Pages |
26 - 36 |
|
Author(s) |
|
|
|
Published
Date |
30-10-2010 |
|
Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
|
ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
| |
|
| |
KEYWORDS: Augmented Reality, shadow, soft shadow, reflective sphere |
|
|
| |
|
|
| This Manuscript is indexed in the following databases/websites:- |
|
| 1. Docstoc |
| 2. Scribd |
| 3. PDFCAST |
| 4. Google Scholar |
| 5. refSeek |
| 6. iSEEK |
| |
|
| |
|
|
| The most challenging task in developing Augmented Reality (AR) applications is to make virtual objects mixed harmoniously with the real scene. To achieve photorealistic AR environment, three key issues must be emphasized namely consistency of geometry, illumination and speed. Shadow is an essential element to improve visual perception and realism. Without shadow, virtual objects will appear like it is floating and thus will make the environment look unrealistic. However, many shadow algorithms still have drawbacks such as producing sharp and hard-edged outlines, which make the shadow’s appearance unrealistic. Thus, this paper will focus on generating soft shadow in AR scene render based on real light sources position, where reflective sphere is used to create environment map image to estimate the light source from the real scene and render the soft shadows. |
| |
|
| |
|
| |
| 1 |
R. Azuma. “A Survey of Augmented Reality”. Presence: Teleoperators and Virtual Environments, 6:355-385, 1997
|
|
|
| 2 |
Z. Noh, M.S. Sunar and Z. Pan. “Review on Augmented Reality for Virtual Heritage System,” Edutainment 2009 Springer-Verlag Berlin Heidelberg, Lecture Note in Computer Science LNCS 5670, pp. 50–61, 2009.
|
|
|
| 3 |
Z. Noh, A.W. Ismail and M.S. Sunar. “Exploring the Potential of using Augmented Reality Approach in Cultural Heritage System”, Proceedings of the 2nd International Conference on Advanced Computer Theory and Engineering (ICACTE 2009), Cairo, Egypt, vol. 1, pp. 711- 718, 2009.
|
|
|
| 4 |
I. Sato, Y. Sato and K. Ikeuchi. “Acquiring a Radiance Distribution to Superimpose Virtual Objects onto a Real Scene”. IEEE Transactions on Visualization and Computer Graphics, 5(1):1-12, 1999
|
|
|
| 5 |
B. F. Jensen, J. S. Laursen, J.B. Madsen and T. W. Pedersen. “Simplifying Real Time Light Source Tracking and Credible Shadow Generation for Augmented Reality”. Institute for Media Technology, Aalborg University, 2009
|
|
|
| 6 |
Z. Noh, M.S. Sunar “A review on shadow techniques in augmented reality”, 2nd International Conference on Machine Vision, ICMV 2009 , pp. 320-324, 2009
|
|
|
| 7 |
N. Sugano, H. Kato and K. Tachibana. “The Effects of Shadow Representation of Virtual Objects in Augmented Reality”. In IEEE/ACM International Symposium on Mixed and Augmented Reality (ISMAR 2003), IEEE Computer Society, pp. 76-83, 2003
|
|
|
| 8 |
K. Jacobs, C. Loscos. “Classification Of Illumination Methods For Mixed Reality”. Computer Graphics Forum, 25(1):29-51, 2006
|
|
|
| 9 |
O. Bimber, A. Grundheimer, G. Wetzstein and S. Knodel. “Consistent Illumination within Optical See-Through Augmented Environments”. In Proceedings of the 2nd IEEE and ACM International Symposium on Mixed and Augmented Reality, pp.198 , 2003
|
|
|
| 10 |
K. Agusanto, L. Li, Z. Chuangui and N.W. Sing. “Photorealistic Rendering for Augmented Reality Using Environment Illumination”. In Proceedings of the 2nd IEEE and ACM International Symposium on Mixed and Augmented Reality, pp.208, 2003
|
|
|
| 11 |
S. Gibson, J. Cook, T. Howard and R. Hubbold. “Rapid Shadow Generation in Real-World Lighting Environments”. In Proceedings of Eurographics Symposium on Rendering 2003, pp. 219–229, 2003
|
|
|
| 12 |
M. Haller, S. Drab and W. Hartmann. “A Real-Time Shadow Approach for an Augmented Reality Application Using Shadow Volumes”. In Proceedings of VRST 03, pp. 56–65, 2003
|
|
|
| 13 |
K. Jacobs, C. Angus and C. Loscos. “Automatic Generation of Consistent Shadows for Augmented Reality”. In Proceedings Graphics Interface, Vancouver, Canada, 2005
|
|
|
| 14 |
C.B. Madsen, M. Nielsen. “Towards Probe-Less Augmented Reality”. A Position Paper, Computer Vision and Media Technology Lab, Aalborg University, Aalborg, Denmark, 2008
|
|
|
| 15 |
C. B. Madsen, R. Laursen. “A Scalable GPU-Based Approach to Shading and Shadowing for Photo-Realistic Real-Time Augmented Reality”. In Proceedings International Conference on Graphics Theory and Applications, pp. 252 – 261, Barcelona, Spain, 2007
|
|
|
| 16 |
C. Loscos, G. Drettakis and L. Robert. “Interactive Virtual Relighting of Real Scenes”. IEEE Transactions on Visualization and Computer Graphics, 6(3):289-305, 2000
|
|
|
| 17 |
F. Yan. “Estimation of Light Source Environment For Illumination Consistency of Augmented Reality”. In First International Congress on Image and Signal Processing, 3:771-775, 2008
|
|
|
| 18 |
T. Naemura, T. Nitta, A. Mimura and H. Harashima. “Virtual Shadows in Mixed Reality Environment using Flashlight-Like Devices”. Trans. Virtual Reality Society of Japan, 7(2): 227-237, 2002
|
|
|
| 19 |
C.B. Madsen, M. K. D. Sorensen and M. Vittrup. “The Important of Shadows in Augmented Reality”. In Proceedings 6th Annual International Workshop on Presence, Aalborg, Denmark, 2003
|
|
|
| 20 |
S. Gibson, A. Murta. “Interactive Rendering with Real World Illumination”. In Proceedings of Eurographics Symposium on Rendering 2000, pp. 365–376, 2000
|
|
|
| 21 |
J. Hasenfratz, M. Lapierre, N. Holzschuch and F. Sillion. “A Survey of Real-Time Soft Shadows Algorithms”. Eurographics, 22(4):753-774, 2003
|
|
|
| 22 |
M. Kanbara, N. Yokoya. “Real-Time Estimation of Light Source Environment for Photorealistic Augmented Reality”. In Proceedings of the 17th International Conference on Pattern Recognition, pp. 911–914, Cambridge,United Kingdom, 2004
|
|
|
| 23 |
M. Kanbara, N. Yokoya. “Geometric and Photometric Registration for Real-Time Augmented Reality”. In IEEE and ACM International Symposium on Mixed and Augmented Reality (ISMAR), pp. 279, 2002
|
|
|
| 24 |
L. Williams. “Casting Curved Shadows on Curved Surfaces”. Computer Graphics. In Proceedings of ACM Siggraph, 1978
|
|
|
| 25 |
P. Debevec. “A Median Cut Algorithm for Light Probe Sampling”. International Conference on Computer Graphics and Interactive Techniques, Los Angeles, California, 2005
|
|
|
| 26 |
J. Konttinen, C.E. Hughes and S.N. Pattanaik. “The Future of Mixed Reality: Issues in Illumination and Shadows”, J. Defense Modeling and Simulation, 2(1):51-59, 2005
|
|
|
| 27 |
M. Herf, P.S. Heckbert. “Fast Soft Shadows”. Visual Proceedings SIGGRAPH 96, pp. 145, 1996
|
|
|
| |
|
| |
|
| |
| |
|
| |
|
| |
| |
|
| |
|
| |
|
| Zakiah Noh : Colleagues
|
|
| Mohd Shahrizal Sunar : Colleagues
|
|
