Table 1.

Training/testing parameters (see [59] for an explanation of the iRprop parameters).

Parameter	Symbol	Value
activation function free parameter	a	1
iRprop weight change increase factor	${\eta }^{+}$	1.2
iRprop weight change decrease factor	${\eta }^{-}$	0.5
iRprop minimum weight change	${\Delta }_{\min }$	0
iRprop maximum weight change	${\Delta }_{\max }$	50
iRprop initial weight change	${\Delta }_0$	0.5
(final) number of training patches		232,094
— positive patches		120,499
— negative patches		111,595
(final) number of test patches		139,150
— positive patches		72,557
— negative patches		66,593