Pre-filtering synthetic imagery by three-dimensional blurring

Sills, Timothy G.

doi:10.1117/12.603257

Cited by 1 publication

(1 citation statement)

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“…One way to overcome the problem is to apply Schade pre-sample blurring to the 3D target model itself, an idea proposed some time ago by Williams. 12 Sills 13,14 recently presented the first practical implementation by rendering multiple versions of the target object, each displaced from the original and characterised by radiance and transparency values chosen in accordance with the Schade criterion. While certainly interesting, the method was limited in accuracy by the number of replicas that could be drawn within the available processing capability.…”

Section: Zaa Applicationmentioning

confidence: 99%

Real-time zoom anti-aliasing improvement using programmable graphics processing units

Gouthas

Williams

2006

SPIE Proceedings

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The zoom anti-aliasing (ZAA) procedure used for rendering computer-generated targets at long range is examined in the light of its lack of conformality with sampling theory. This has led to the development of a GPU-based conformal version, called Schade ZAA. It is shown that Schade ZAA leads to improvement in intensity errors and significantly less scintillation when the target subtends less than a single pixel in screen space. It is shown further that the intensity errors for the normal type of irregularly-shaped target of most user interest are considerably smaller than has been previously reported. This is a significant result in that it gives confidence that the intensity of small and point source targets can be successfully conserved within the ZAA process.

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Section: Zaa Applicationmentioning

confidence: 99%