Development of a System to Assist Automatic Translation of Hand-Drawn Maps into Tactile Graphics and Its Usability Evaluation

Table 1

Experimental results are as follows:  𝑁 is the number of all objects for the symbol, 𝑇 is the number of objects correctly classified as the symbol, 𝐶 is the number of objects classified as the symbol, 𝑃 is precision, 𝑅 is recall, and 𝐹 is 𝐹-measure.

Symbol	𝑁	𝑇	𝐶	𝑃 (%)	𝑅 (%)	𝐹 (%)
Traffic signal	50	50	52	96.2	100	98.1
Destination	15	15	15	100	100	100
Departure place	15	14	14	100	93.3	96.5
Landmark	40	38	38	100	95.0	97.4
Cross	130	125	125	100	96.2	98.1
Arrow	122	121	121	100	99.2	99.6
Route	15	14	16	87.5	93.3	90.3
Railway	28	28	28	100	100	100