Accelerating Transfer Function Update for Distance Map based Volume Rendering
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866912179575324672 |
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| author | Rauter, Michael Zimmermann, Lukas Zeilinger, Markus |
| author_facet | Rauter, Michael Zimmermann, Lukas Zeilinger, Markus |
| contents | Direct volume rendering using ray-casting is widely used in practice. By using GPUs and applying acceleration techniques as empty space skipping, high frame rates are possible on modern hardware. This enables performance-critical use-cases such as virtual reality volume rendering. The currently fastest known technique uses volumetric distance maps to skip empty sections of the volume during ray-casting but requires the distance map to be updated per transfer function change. In this paper, we demonstrate a technique for subdividing the volume intensity range into partitions and deriving what we call partitioned distance maps. These can be used to accelerate the distance map computation for a newly changed transfer function by a factor up to 30. This allows the currently fastest known empty space skipping approach to be used while maintaining high frame rates even when the transfer function is changed frequently. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21552 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Accelerating Transfer Function Update for Distance Map based Volume Rendering Rauter, Michael Zimmermann, Lukas Zeilinger, Markus Graphics Performance I.3.3; F.2.0 Direct volume rendering using ray-casting is widely used in practice. By using GPUs and applying acceleration techniques as empty space skipping, high frame rates are possible on modern hardware. This enables performance-critical use-cases such as virtual reality volume rendering. The currently fastest known technique uses volumetric distance maps to skip empty sections of the volume during ray-casting but requires the distance map to be updated per transfer function change. In this paper, we demonstrate a technique for subdividing the volume intensity range into partitions and deriving what we call partitioned distance maps. These can be used to accelerate the distance map computation for a newly changed transfer function by a factor up to 30. This allows the currently fastest known empty space skipping approach to be used while maintaining high frame rates even when the transfer function is changed frequently. |
| title | Accelerating Transfer Function Update for Distance Map based Volume Rendering |
| topic | Graphics Performance I.3.3; F.2.0 |
| url | https://arxiv.org/abs/2407.21552 |