PaperCAD: A System for Interrogating CAD Drawings Using Small Mobile Computing Devices Combined with Interactive Paper

Table 7

Interpretation of traces.

Event	Correct	Incorrect
Correctly interpreted	102
Did not complete before timeout (U)		3
Drawn too far from the drawing (U)		3
Misinterpreted as not forming a closed contour (S)		1
Total	102	6

U: user error; S: system error.