Structured light: Difference between revisions
rv; this seems like experimental stuff and doesn't add much value to the article. |
Needs a rewrite but it's a notable use |
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[[File:AutomatixSeamtrackerDev.agr.jpg|thumb|[[Automatix]] Seamtracker [[arc welding]] robot equipped with a camera and structured laser light source. enabling the robot to follow a welding seam automatically.]] |
[[File:AutomatixSeamtrackerDev.agr.jpg|thumb|[[Automatix]] Seamtracker [[arc welding]] robot equipped with a camera and structured laser light source. enabling the robot to follow a welding seam automatically.]] |
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'''Invisible (or Imperceptible) Structured Light''' is a technique to utilise structured light without interfering with other computer vision tasks for which the projected pattern will be confusing. Example methods include the use of infrared light or of extremely high framerates alternating between two exact opposite patterns. |
'''Invisible (or Imperceptible) Structured Light''' is a technique to utilise structured light without interfering with other computer vision tasks for which the projected pattern will be confusing. Example methods include the use of infrared light or of extremely high framerates alternating between two exact opposite patterns. |
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Structured light is used by a number of police forces for the purpose of photographing fingerprints in a 3d scene. Where previously they would use tape to extract the fingerprint and flatten it out, they can now use cameras and flatten the fingerprint digitally. |
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==See also== |
==See also== |
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Revision as of 16:17, 16 November 2009
Structured light is the process of projecting a known pattern of pixels (often grids or horizontal bars) on to a scene. The way that these deform when striking surfaces allows vision systems to calculate the depth and surface information of the objects in the scene, as used in structured light 3D scanners.
Invisible (or Imperceptible) Structured Light is a technique to utilise structured light without interfering with other computer vision tasks for which the projected pattern will be confusing. Example methods include the use of infrared light or of extremely high framerates alternating between two exact opposite patterns.
Structured light is used by a number of police forces for the purpose of photographing fingerprints in a 3d scene. Where previously they would use tape to extract the fingerprint and flatten it out, they can now use cameras and flatten the fingerprint digitally.
See also
Papers
- High-accuracy stereo depth maps using structured light
- A comparative survey on invisible structured light
- A Real-Time Laser Range Finding Vision System