Compressive Volume Rendering

Compressive rendering refers to the process of reconstructing a full image from a small subset of the rendered pixels, thereby expediting the rendering task. In this paper, we empirically investigate three image order techniques for compressive rendering that are suitable for direct volume rendering...

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Vydáno v:Computer graphics forum Ročník 34; číslo 3; s. 101 - 110
Hlavní autoři: Liu, Xiaoyang, Alim, Usman R.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Blackwell Publishing Ltd 01.06.2015
Témata:
Analysis
Categories and Subject Descriptors (according to ACM CCS)
Compressed
Detection
Fourier analysis
I.3.3 [Computer Graphics]: Picture/Image Generation-Line and curve generation
Image processing systems
Image reconstruction
Pixels
Rendering
Smoothness
Studies
ISSN:0167-7055, 1467-8659
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Popis
Shrnutí:Compressive rendering refers to the process of reconstructing a full image from a small subset of the rendered pixels, thereby expediting the rendering task. In this paper, we empirically investigate three image order techniques for compressive rendering that are suitable for direct volume rendering. The first technique is based on the theory of compressed sensing and leverages the sparsity of the image gradient in the Fourier domain. The latter techniques exploit smoothness properties of the rendered image; the second technique recovers the missing pixels via a total variation minimization procedure while the third technique incorporates a smoothness prior in a variational reconstruction framework employing interpolating cubic B‐splines. We compare and contrast the three techniques in terms of quality, efficiency and sensitivity to the distribution of pixels. Our results show that smoothness‐based techniques significantly outperform techniques that are based on compressed sensing and are also robust in the presence of highly incomplete information. We achieve high quality recovery with as little as 20% of the pixels distributed uniformly in screen space.
Bibliografie:ArticleID:CGF12622
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.12622