This approach uses a light plane or wedge that illuminates a body, while a camera observes the resulting stripe from a offset position to compute depth.

The method relies on a measurable property impressed on the light, kept constant in vertical slices but varying across the wedge. By comparing two images taken under different illumination, the system forms a ratio of intensities that remains invariant under reflection. That ratio, together with triangulation, lets researchers infer the three-dimensional locations of visible surface points. The concept aims to speed up surface reconstruction compared with older methods and discusses practical challenges like camera response, focus, and ambient light.

How a striped light scheme creates 3-D data without moving parts
How a ratio of two intensities can stay stable for depth calculations
Why invariance under reflection matters for accurate sensing
What practical issues can affect accuracy and how to address them

Ideal for readers interested in robotics, computer vision, and practical 3-D sensing techniques.

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