دورية أكاديمية
Efficient ray casting of volumetric images using distance maps for empty space skipping
| العنوان: | Efficient ray casting of volumetric images using distance maps for empty space skipping |
|---|---|
| المؤلفون: | Lachlan J. Deakin, Mark A. Knackstedt |
| المصدر: | Computational Visual Media, Vol 6, Iss 1, Pp 53-63 (2020) |
| بيانات النشر: | SpringerOpen, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Electronic computers. Computer science |
| مصطلحات موضوعية: | ray casting, volume rendering, isosurface rendering, distance maps, Electronic computers. Computer science, QA75.5-76.95 |
| الوصف: | Abstract Volume and isosurface rendering are methods of projecting volumetric images to two dimensions for visualisation. These methods are common in medical imaging and scientific visualisation. Head-mounted optical see-through displays have recently become an affordable technology and are a promising platform for volumetric image visualisation. Images displayed on a head-mounted display must be presented at a high frame rate and with low latency to compensate for head motion. High latency can be jarring and may cause cybersickness which has similar symptoms to motion sickness. Volumetric images can be very computationally expensive to render as they often have hundreds of millions of scalar values. Fortunately, certain materials in images such as air surrounding an object boundary are often made transparent and need not be sampled, which improves rendering efficiency. In our previous work we introduced a novel ray traversal technique for rendering large sparse volumetric images at high frame rates. The method relied on the computation of an occupancy and distance map to speed up ray traversal through empty regions. In this work we achieve higher frame rates than our previous work with an improved method of resuming empty space skipping and the use of anisotropic Chebyshev distance maps. An optimised algorithm for computing Chebyshev distance maps on a graphical processing unit is introduced supporting real-time transfer function editing. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2096-0433 2096-0662 |
| Relation: | https://doaj.org/toc/2096-0433; https://doaj.org/toc/2096-0662 |
| DOI: | 10.1007/s41095-019-0155-y |
| URL الوصول: | https://doaj.org/article/e494d05f2ef147e8a2c50485e8f059ad |
| رقم الأكسشن: | edsdoj.494d05f2ef147e8a2c50485e8f059ad |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 20960433 20960662 |
|---|---|
| DOI: | 10.1007/s41095-019-0155-y |