Invention Grant
- Patent Title: Device and method to compute shadow in a 3D scene
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Application No.: US14938734Application Date: 2015-11-11
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Publication No.: US10339703B2Publication Date: 2019-07-02
- Inventor: Pascal Lecocq , Jean-Eudes Marvie , Arthur Dufay
- Applicant: THOMSON LICENSING
- Applicant Address: FR Rennes
- Assignee: Vidon Patents and Strategy
- Current Assignee: Vidon Patents and Strategy
- Current Assignee Address: FR Rennes
- Agency: Myers Wolin LLC
- Priority: EP14306804 20141113
- Main IPC: G06T15/06
- IPC: G06T15/06 ; G06T15/60

Abstract:
Shadow is computed in a lighted 3D scene, based on a depth map. For each depth map element, following geometric information is stored: depth value, coordinates of vertices and local depth variation of a surface element. Also, ray intersection is tested for a pixel with the surface element having depth computed from the depth and local depth variation, taking into account the coordinates of vertices. A minimum depth associated with the surface element is further computed from the geometric information, with which the depth of a pixel is compared. The pixel is classified as lit if the depth is lower than the minimum depth, and as shadowed if the depth is greater and if a ray intersection is found for the pixel with the surface element from the ray intersection testing. The invention can provide a fast solution for high-quality shadow.
Public/Granted literature
- US20190057544A1 DEVICE AND METHOD TO COMPUTE SHADOW IN A 3D SCENE Public/Granted day:2019-02-21
Information query
IPC分类:
G | 物理 |
G06 | 计算;推算或计数 |
G06T | 一般的图像数据处理或产生 |
G06T15/00 | 3D〔三维〕图像的加工 |
G06T15/06 | .光线跟踪 |