page_title: Shading
section_title: Computer vision
hierarchical_section_title: Shading / Computer vision
caption_attribution_description: English: Explanatory diagram of photometric stereo. Multiple images of an object under different lighting are analyzed to produce an estimated normal direction at each pixel.
context_page_description: Shading refers to the depiction of depth perception in 3D models or illustrations by varying the level of darkness. Shading tries to approximate local behavior of light on the object's surface and is not to be confused with techniques of adding shadows, such as shadow mapping or shadow volumes, which fall under global behavior of light.
context_section_description: In computer vision, some methods for 3D reconstruction are based on shading, or shape-from-shading. Based on an image's shading, a three-dimensional model can be reconstructed from a single photograph.
caption: "Shape from shading" reconstruction
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