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Large-scale-scene indirect illumination algorithm based on scene light map

A light map, indirect technology, applied in the field of image processing, can solve the problem of slow change of indirect light and so on

Inactive Publication Date: 2014-12-03
BEIHANG UNIV
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Problems solved by technology

Although the light map will be distorted due to the resolution problem, the indirect light changes slowly in the scene, and it can be approximated for general surface materials.

Method used

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  • Large-scale-scene indirect illumination algorithm based on scene light map
  • Large-scale-scene indirect illumination algorithm based on scene light map
  • Large-scale-scene indirect illumination algorithm based on scene light map

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Embodiment Construction

[0054] In order to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] See figure 1 - Fig. 4 (a), (b), the present invention is a kind of large scene non-direct illumination algorithm based on scene illumination graph, and this method mainly comprises the following several steps:

[0056] Step 1: Parameterize the scene in the texture space;

[0057] Step 2: Calculate the scene light map;

[0058] Step 3: According to the scene light map dynamically baked in step 1, use the ray tracing algorithm to calculate indirect lighting;

[0059] Step 4: Use frame association to reduce the amount of indirect lighting calculations.

[0060] The concrete realization process of the present invention is as figure 1 As shown, the specific implementation details of each part are as follows:

[0061] 1. Parameterize the scene in texture spac...

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Abstract

The invention provides a large-scale-scene indirect illumination algorithm based on a scene light map. The large-scale-scene indirect illumination algorithm based on the scene light map comprises the four steps that firstly, parameterization is conducted on a scene in a texture space; secondly, the scene light map is calculated; thirdly, according to the scene light map which is dynamically baked in the second step, indirect illumination is worked out through a light ray tracking algorithm; fourthly, the amount of calculation of indirect illumination is reduced through frame correlation. By the adoption of the large-scale-scene indirect illumination algorithm based on the scene light map, a complicated scene can be well supported, and effects are adjustable and stable. The large-scale-scene indirect illumination algorithm based on the scene light map has high practicable value and broad application prospect in the image processing technical field.

Description

technical field [0001] The invention relates to an indirect illumination algorithm for a large scene based on a scene illumination map, belongs to the technical field of image processing, and in particular relates to an image processing technique for calculating indirect illumination in global illumination in a real-time rendering process. Background technique [0002] Calculation of global illumination is a relatively difficult problem. It includes direct light, indirect light and its shadows. Since the entire scene may affect indirect light, and many of the indirect light are obtained through multiple reflections. Indirect lighting has a great impact on the visual effect of the scene, but requires a relatively large calculation cost. It is a difficult problem to calculate indirect lighting when real-time rendering is required. [0003] Many existing processing algorithms can handle indirect lighting, but they all have some problems. For example, the pre-calculated radianc...

Claims

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Application Information

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IPC IPC(8): G06T15/55G06T15/06
Inventor 周付根资粤吴福祥
Owner BEIHANG UNIV
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