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depth map : ウィキペディア英語版
depth map

In 3D computer graphics a depth map is an image or image channel that contains information relating to the distance of the surfaces of scene objects from a viewpoint. The term is related to and may be analogous to depth buffer, Z-buffer, Z-buffering and Z-depth.〔(Computer Arts / 3D World Glossary ), Document retrieved 26 January 2011.〕 The "Z" in these latter terms relates to a convention that the central axis of view of a camera is in the direction of the camera's Z axis, and not to the absolute Z axis of a scene.
== Examples ==

File:Cubic Structure.jpg|Cubic Structure
File:Cubic Frame Stucture and Floor Depth Map.jpg|Depth Map: Nearer is darker
File:Cubic Structure and Floor Depth Map with Front and Back Delimitation.jpg|Depth Map: Nearer the Focal Plane is darker

Two different depth maps can be seen here, together with the original model from which they are derived.
The first depth map shows luminance in proportion to the distance from the camera. Nearer surfaces are darker; further surfaces are lighter. The second depth map shows luminance in relation to the distances from a nominal focal plane. Surfaces closer to the focal plane are darker; surfaces further from the focal plane are lighter, (both closer to and also further away from the viewpoint).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「depth map」の詳細全文を読む



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