Virtual Sectioning and Haptic Exploration of Volumetric Shapes in the Absence of Visual Feedback

Table 1

Confusion matrix of the virtual shapes recognition and identification (%) in the free scanning mode, averaged over all participants.

Test objects	Cylinder	2 Cylinders	Trapez. prism	2 Trap. prisms	2 Balls	A ball	2 Hemisph.	Half ball	Torus	Ripples
Cylinder	98.66		0.67					0.67
2 Cylinders		97.99					2.01
Trapez. prism	1.34		97.32			1.34
2 Trap. prisms	0.67	0.67		97.99			0.67
2 Balls					98.66			0.67	0.67
A ball	1.34		0.67			95.31	0.67	2.01
2 Hemispheres		1.34		1.34	0.67		96.65
A half ball					1.34	2.68	0.67	94.64	0.67
Torus		0.67		0.67	0.67				97.99
Ripples										100