Consistent lighting method under falsehood-reality fused environment

Abstract

The invention discloses a consistent lighting method under a falsehood-reality fused environment, comprising the following steps: shooting a high dynamic range image reflecting a real environment, of a small mirror-surface sphere in a real scene, and acquiring an environmental lighting map of the real scene; preprocessing the environmental lighting map of the real scene and surface reflection attributes of a virtual object; preprocessing the environmental lighting of the real scene to generate environment lighting on a unit small sphere under local coordinates corresponding to all normal vectors to obtain Haar wavelet coefficients of the environment lighting; preprocessing a bidirectional reflection distribution function to generate slices of the bidirectional reflection distribution function on the unit hemisphere under all sight directions to obtain Haar wavelet coefficients of the slices; and drawing a falsehood-reality fused environment, indexing the wavelet coefficients of the environment lighting and the slices of the bidirectional reflection distribution function according to a normal vector of an apex of the virtual object and the sight directions, calculating a vector product of the coefficients to obtain an apex drawing color, and meanwhile, accelerating by adopting GPU (Graphics Processing Unit). The consistent lighting method can be used for efficiently realizing afull-range environment lighting drawing effect under the falsehood-reality fused environment.

Description

technical field [0001] The invention belongs to the technical field of computer virtual reality, and specifically realizes illumination consistency in a virtual-real fusion environment and realistically draws virtual-real fusion scenes. The method can be used for realistic rendering of scenes in a virtual-real fusion environment. Background technique [0002] The virtual-real fusion environment is an environment formed by the combination of virtual objects and real objects. Nowadays, virtual-real fusion applications are more and more widely used, such as medical treatment, maintenance, construction, cultural heritage and life entertainment. In a highly realistic virtual environment, the user's various activities will occur in a more natural way, and the user's behavior will be more efficient. In order to make the virtual objects generated by the computer have a sense of reality, the user will be convinced from the senses that the virtual objects are the surrounding environmen...

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