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With a partially calibrated stereo or shape from unknown motion method, the reconstruction of an object can be performed but at most up to a scale factor. Therefore, metric measurements of the 3D feature cannot be achieved. This paper proposes a method to enable metric measurements of the 3D features starting from 3D length measurement by moving camera. The best focused location in an image is used as a cue in upgrading the relative geometry of a target feature into an absolute one. Hence, we can obtain dimension and metric sizes of object features.
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE (Volume:1 )
Date of Conference: 18-20 May 2004