Table 1.

Quantitative comparison of different focus algorithms.

Metrics	Ideal	NOCC-based method	Energy	Tenengrad	Brenner	Variance	Triangle	Otsu
Range (μm)	300	247	12.5	13.5	13	33	60.5	42.5
False max	0	0.6	8	2.7	4.6	1.6	6.2	8.4