Table 2.

Classification of All the Points in 23 Patients According to AF Rings Judged by the Binarization and Freehand Methods

	Freehand
	IN	ON	OUT	Total
Binarization
IN	167	35	0	202
ON	3	152	13	168
OUT	0	41	1153	1194
Total	170	228	1166	1564