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公开(公告)号：US20190057544A1
公开(公告)日：2019-02-21
申请号：US14938734
申请日：2015-11-11
申请人： THOMSON LICENSING
发明人： Pascal LECOCQ , Jean-Eudes Marvie , Arthur Dufay
摘要： 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.
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公开(公告)号：US10339703B2
公开(公告)日：2019-07-02
申请号：US14938734
申请日：2015-11-11
申请人： THOMSON LICENSING
发明人： Pascal Lecocq , Jean-Eudes Marvie , Arthur Dufay
摘要： 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.
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