Table 1. Assessment of results from four automatic detection techniques in relation to manually digitized whales; results from two unsupervised classification techniques and two Thresholding analyses.

	Manually digitized		Unsupervied iso means	Unsupervised kmeans	Threshold Panchromatic	Threshold Band 5
total signals	91	total signals	158	102	64	101
probable	55	probable matches	44	42	43	49
possible	23	possible matches	16	11	14	15
Band 5 only	13	band 5 matches	1	0	0	13
		total found	61	53	57	77
		% found	67.0	58.2	62.6	84.6
		% of probable	80.0	76.4	78.2	89.1
		total missed	30	38	34	14
		% missed	33.0	41.8	37.4	15.4
		false positives	97	49	7	24
		% false positives	61.4	48.0	10.9	23.8
		% good	38.6	52.0	89.1	76.2