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Rendering method of ambient occlusion image, method for generating effect image and apparatus

An ambient light occlusion and screen space technology, applied in the field of graphics rendering, can solve problems such as low operating efficiency and affecting operating stability

Active Publication Date: 2018-02-23
上海灵犀互动娱乐有限公司
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Problems solved by technology

The limitation of the above technology is that when evaluating the light shielding degree of each point in the scene, a space conversion process is required, the operation efficiency is not high, and the operation stability is affected

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  • Rendering method of ambient occlusion image, method for generating effect image and apparatus

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Embodiment Construction

[0084] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0085] Screen Space Ambient Occlusion (hereinafter referred to as SSAO) is a graphics rendering technology that simulates the scene receiving ambient light occlusion in a post-processing manner, and is often used in the field of real-time rendering in game development. The SSAO in the prior art calculates the ambient light occlusion value (hereinafter ...

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Abstract

The present invention discloses a rendering method of an ambient occlusion image, a method for generating an effect image and an apparatus. The rendering method includes the following steps that: a rendering model located in a camera space is obtained; each pixel of the rendering model in the camera space is projected to a screen space through perspective transformation; the ambient occlusion value of each pixel in the screen space is calculated; and the ambient occlusion image is generated according to the ambient occlusion value of each pixel. According to the rendering method provided by the technical schemes of the invention, the pixels of the rendering model in a scene are projected to the screen space from the camera space; the ambient occlusion values of the pixels in the screen space are calculated; and therefore, a frequent space transformation process is omitted, the number of the instructions of a GPU during operation can be saved, and the operation efficiency of the GPU canbe improved.

Description

technical field [0001] The present invention relates to the technical field of graphics rendering, in particular, the present invention relates to a rendering method of a light environment occlusion map, a method and a device for generating an effect map. Background technique [0002] Ambient Occlusion (AO) is a global illumination algorithm that enhances the layering of geometric models in the scene by improving the shadows in the rendered scene, thereby simulating the effect of global illumination, but due to its calculation It is complex and resource-intensive and cannot be applied to the field of real-time rendering. The ScreenSpace Ambient Occlusion (SSAO) method is a real-time rendering technology widely used in the field of game development. Its technical core is to calculate based on the depth buffer of the screen space and evaluate each point in each scene by means of discrete sampling. degree of light shading. [0003] The screen space ambient light occlusion met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/50G06T1/20
CPCG06T1/20G06T15/50
Inventor 洪智标
Owner 上海灵犀互动娱乐有限公司
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