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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: IEEE Trans Ind Electron. 2016 Apr 21;64(2):1626–1635. doi: 10.1109/TIE.2016.2557306

Fig. 3.

Fig. 3

Motion control scheme in which position data is extracted from the image sensors and used to guide robotic motions. (a) Stereo vision-based, and (b) US-based visual servoing. During the venipuncture, the force sensor helps compute the needle tip location, serving as the third method of feedback.