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Displacement mapping for the precise representation of protrusion

posted Dec 3, 2008, 10:18 PM by Byounghyun Yoo   [ updated Jun 28, 2014, 12:14 AM ]
Byounghyun Yoo and Soonhung Han, Journal of KIISE (Korean Institue of Information Scientists and Engineers): Computer Systems and Theory, 33(10), pp.777-788, 2006 October.

Abstract: This paper describes a displacement mapping technique which represents protruded shapes on the surface of an object. Previous approaches for image-based displacement mapping can represent only shapes depressed from the polygon surface. The proposed technique can represent shapes protruded from the underlying surface in real-time. Two auxiliary surfaces which are perpendicular to the underlying surface are added along the boundary of the polygon surface, in order to represent the pixels which overflow over the boundary of the polygon surface. The proposed approach can represent accurate silhouette of protruded shape. It can represent not only smooth displacement of protruded shape, but also abrupt displacement such as perpendicular protrusion by means of adding the supplementary texture information to the steep surface of protruded shape. By per-pixel instructions on the programmable GPU this approach can be executed in real-time. It provides an effective solution for the representation of protruded shape such as high-rise buildings on the ground.

Keywords: image-based rendering, motion parallax, protruded shape representation, real-time rendering, silhouette rendering, steep displacement mapping, surface details

Korean title: 정확한 돌출 형상의 표현을 위한 변위매핑 (정보과학회논문지 : 시스템 및 이론)

Byounghyun Yoo,
Dec 4, 2011, 7:09 AM