Sign Language Recognition - Vision

The other common approach to sign language recognition is Vision-based. Video footage of subjects signing are fed into the computer either in real-time or as a video file recorded earlier.


  • Mainstream hardware. Video cameras are easier to obtain, configure and control than the CyberGlove.
  • Closer to natural. Signers don't wear any special equipment that may impede in their signing.
  • Easier to productionize. No (extra) special equipment needed in applications.


  • Sensitive to lighting conditions, and background noise.
  • Occlusion is a problem. In certain positions, the hands and arms will obscure the face or the other hand/arm.
  • Not as accurate as Direct Measure and it depends on the camera resolution.

If it wasn't obvious already, I'll be going with the Vision-based approach.

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