Bounding volume hierarchy design method targeted at motion blur

A technology of hierarchical bounding boxes and design methods, applied in computing, 3D image processing, image data processing, etc., can solve problems such as failure of difference method, performance degradation, and BVH structure quality degradation

Inactive Publication Date: 2014-10-08
DALIAN UNIV OF TECH +1
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Problems solved by technology

However, for scenes with irregular motion behavior, the performance of these methods will decrease, because the overlapping problem is more obvious in this case, the difference method will fail, and the quality of the BVH structure will degrade rapidly

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  • Bounding volume hierarchy design method targeted at motion blur
  • Bounding volume hierarchy design method targeted at motion blur

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with specific embodiments, but the present invention is not limited to specific embodiments.

[0038] A motion blur-oriented hierarchical bounding box design method, including two parts: the construction phase and the traversal phase:

[0039] (1) Construction stage:

[0040] The first step: Find all the patches with irregular motion behavior in the nodes of the BVH structure; the patches with irregular behavior are defined as follows: if there is a patch, because of the movement behavior, the node to which it belongs If the bounding box intersects with another node's bounding box, thereby destroying the hierarchical relationship of the tree structure, the movement of the patch is defined to be irregular; because some node bounding boxes in the tree structure may contain some leaf nodes based on time Extended bounding box, according to this property, the present invention captures all patch...

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Abstract

The invention discloses a bounding volume hierarchy design method targeted at motion blur. The method includes two parts: a construction period and a traversal period. In the construction period, the method includes the following steps: in a node of a BVH structure, finding out all surface patches with irregular motion behaviors; collecting all surface patches with the above mentioned characteristics and placing the surface patches at a special node: MB node and recording a time point when the surface patches cross a dividing plane at the same time; and after the MB node is generated, setting a threshold, when surface patches which move into the MB node cover more than 50% of all the surface patches, according to an SAH cost model, recalculating the potion of a division point on the basis of remaining surface patches in the node so as to generate new left and right sub-nodes. In the traversal period, the method includes the following steps: instructing the irregular surface patches in the MB node to be redistributed; re-dividing all the surface patches in the MB node into corresponding left and right sub-nodes; and then re-calculating corresponding node bounding volume hierarchies and adjusting downward bounding volume hierarchies of sub-nodes and carrying out recursion on the process until the whole updating work is completed.

Description

technical field [0001] The invention relates to the technical field of graphic real-time rendering, in particular to a method for designing a hierarchical bounding box for motion blur effect rendering. Background technique [0002] Motion blur is an image effect that can occur during camera photography, usually caused by objects or rapid camera movement. During the limited time when the object and the camera are moving relative to each other, keep the shutter of the camera open all the time, so that the obtained pictures can simulate the feeling of the human eye, and the phenomenon of motion blur appears. The motion blur effect can reduce or remove the flickering phenomenon of the picture, bringing great visual realism to the scene drawing. In cinematic rendering techniques, motion blur is very important for realistic effects due to the low frame rate. With the rapid development of entertainment industries such as virtual reality, video games, and film production, motion b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/10
Inventor 杨鑫杨冰王鹏杰黄燕赵楠
Owner DALIAN UNIV OF TECH
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