✦ LIBER ✦

Systematic errors of the ray-tracing algorithm

✍ Scribed by Hilmar Lehnert

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 734 KB
Volume: 38
Category: Article
ISSN: 0003-682X
DOI: 10.1016/0003-682x(93)90052-8

No coin nor oath required. For personal study only.

✦ Synopsis

Ray tracing is a method frequently used for modelling sound propagation in enclosed spaces. This paper considers two kinds of inherent systematic errors of this method, namely, errors due to a detection problem and errors due to limited spatial resolution. The first one is caused by the fact that rays cannot, in principle, be detected by point-shaped receivers. The latter is due to the limited number of traceable rays. Effects of both error types on the auditor), percepts as well as on computation time are discussed. It is shown that the detection errors of the first kind can be eliminated without sign~'cant increase in computation time. As to the limitation of the number of rays, which leads to restricted spatial resolution and, consequently, also to a deficit in detection, error correction is also possible. After some theoretic analysis an algorithm .for this purpose is proposed and perceptually validated.

📜 SIMILAR VOLUMES

Error investigation for the ray tracing

Error investigation for the ray tracing technique

✍ A. Kulowski 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 506 KB

This paper presents a method of determining a quantitative measure of the ray tracing technique error. This error results from replacing a wave structure of an acoustical field by a grain one. A standard deviation is used as a credibility parameter of the calculation result. Other kinds of credibili

Possible Systematic Errors in Single-Sho

Possible Systematic Errors in Single-Shot Measurements of the Trace of the Diffusion Tensor

✍ Thomas M. de Swiet; Partha P. Mitra 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 179 KB

In this paper, we show that in cases where the diffusion sequences that purport to measure the trace of the diffusion tensor, coefficient has some time dependence, due to the presence or to weight an image by that rotationally invariant quantity. Here of restrictions to motion, such single-shot meas

Parallel implementation of a ray tracing

Parallel implementation of a ray tracing algorithm for distributed memory parallel computers

✍ Lee, Tong-Yee; Raghavendra, C. S.; Nicholas, John B. 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 145 KB 👁 3 views

Ray tracing is a well known technique to generate life-like images. Unfortunately, ray tracing complex scenes can require large amounts of CPU time and memory storage. Distributed memory parallel computers with large memory capacities and high processing speeds are ideal candidates to perform ray tr

Systematic errors and the variation of t

Systematic errors and the variation of the pole

✍ William Bentley Varnum 📂 Article 📅 1927 🏛 John Wiley and Sons 🌐 English ⚖ 309 KB 👁 2 views

Errors in the gran addition method: Part

Errors in the gran addition method: Part II. Theoretical calculation of systematic errors

✍ J. Buffle 📂 Article 📅 1972 🏛 Elsevier Science 🌐 English ⚖ 423 KB

The importance of statistical errors on the different parameters involved in the Gran addition technique has been discussed in Part I of this series'. In order to obtain optimal predtsion in volume V, obt;dmc~ b,v e~W4xsasjo4 fm paramekrs V miw V,, C, C,, N (for definitions, see Part I) should be ch

On the multiplaten Z-buffer algorithm fo

On the multiplaten Z-buffer algorithm for ray tracing in high-frequency electromagnetic scattering computations

✍ Yong Zhou; Hao Ling 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 125 KB

## Abstract A ray tracer based on the multiplaten Z‐buffer (MPZ) algorithm is implemented and its performance is evaluated against the binary space‐partition tree algorithm. Our results indicate that the computational complexity of the MPZ is independent of the number of facets, thus making it pote