Paper Info
Title
Warping of a spherical representation of image-based models on GPU
Abstract
Image warping techniques are frequently used to render 3D scenes from images with depth information for VR applications. In this paper, we first propose a spherical representation of image-based models call the Spherical Depth Image (SDI). With two Warping Equations, at runtime we then pre-warp the image onto a view-dependent plane to get an intermediate image, which is further rendered onto the target image plane using standard texture mapping. Compared with other representations, SDI is sampled uniformly and completely, therefore it can reduce much unnecessary rendering overhead and the resultant rendered image is hole-free. To speed up the computation and utilize hardware's rasterization function for image interpolation, we transport the pre-warping process into GPU's Vertex Shader. Besides, high quality rendering effect in Pixel Shader can also be achieved as traditional geometry based methods. Finally, we overcome the approach's limitation of viewing region, and design a real-time walkthrough system with LOD representations of the SDIs.
Year
DOI
Venue
2009
10.1145/1670252.1670272
VRCAI
Keywords
Field
DocType
high quality rendering effect,pixel shader,image interpolation,spherical representation,spherical depth image,view-dependent plane,intermediate image,image-based model,lod representation,unnecessary rendering overhead,target image plane,vertex shader,real time,image warping,texture mapping,image based rendering
Computer vision,Image warping,Computer graphics (images),Feature detection (computer vision),Image texture,Computer science,Image plane,Image-based lighting,Image processing,Artificial intelligence,Rendering (computer graphics),Image-based modeling and rendering
Conference
Citations 
PageRank 
References 
0
0.34
16
Authors
5
Name
Order
Citations
PageRank
Jian Zhu100.34
Youquan Liu215213.46
Kai Bao3433.80
Yuanzhang Chang4422.82
Enhua Wu5916115.33