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. 2017 Sep 14;4(5):168–173. doi: 10.1049/htl.2017.0066

Fig. 3.

Fig. 3

Overview of the 3D tool tracking process

a Depth image with surface normals in input frame

b Colour image in input frame

c Geometrical segmentation result

d Visible part of 3D tool model in the previous frame

e Detected TS in input frame

f ICP between the 3D tool model and TS

g Registered 3D tool model in depth image