Authors:
Jung-Hsuan Wu
1
and
Suguru Saito
2
Affiliations:
1
Tokyo Institute of Technology, Japan
;
2
Tokyo Institute of Technology and Ochanomizu University, Japan
Keyword(s):
Image-based Modeling, Image-based Rendering.
Related
Ontology
Subjects/Areas/Topics:
Applications
;
Computer Vision, Visualization and Computer Graphics
;
Geometry and Modeling
;
Image-Based Modeling
;
Image-Based Rendering
;
Interactive Environments
;
Pattern Recognition
;
Rendering
;
Scene and Object Modeling
;
Software Engineering
;
Virtual Tours
Abstract:
Shadows play an important role in the human perception of 3D geometry in photographs, and properly synthesized shadows produce a realistic rendering result. Shadows, especially hard shadows, define powerful constraints between a light source, occluders, and the surfaces onto which shadows are cast. We aim to create a pseudo 3D scene in which the light produces shadows that are the same as those in the input image by taking the shadow constraints into account. Our method requires only a few user annotations and an input image, with the objects and their cast-shadows segmented in advance. The segmentation and the user annotations are used to create a shadow-free texture and a 3D scene, and users can then interactively edit the image by moving the objects and changing the lighting. Our system produces realistic shadows in real-time while enabling interactive editing.