Table 1.

Number of pixels (n) in the ROI obtained for different combinations in the pitch angle (α), height of the camera (h) and distance to the ROI (d).

α = 10°			α = 20°			α = 30°			α = 40°			α = 50°
d (m)	h (cm)	n	d (m)	h (cm)	n	d (m)	h (cm)	n	d (m)	h (cm)	n	d (m)	h (cm)	n
3.0	210	120,456	3.0	210	119,872	3.0	210	114,152	3.0	210	118,338	3.0	210	121,236
	215	122,547		215	121,622		215	115,351		215	118,645		215	123,568
	220	124,754		220	123,682		220	116,321		220	119,078		220	125,698
	225	126,354		225	125,462		225	117,244		225	119,176		225	127,425
	230	128,452		230	127,442		230	118,089		230	119,357		230	129,423
3.5	210	101,239	3.5	210	98,589	3.5	210	94,523	3.5	210	94,021	3.5	210	94,865
	215	102,569		215	99,745		215	95,325		215	95,685		215	95,862
	220	103,698		220	100,695		220	95,986		220	96,852		220	96,899
	225	103,967		225	100,885		225	96,854		225	97,246		225	97,585
	230	104,693		230	101,210		230	98,752		230	98,563		230	98,865
4.0	210	71,895	4.0	210	70,912	4.0	210	68,108	4.0	210	74,594	4.0	210	74,625
	215	72,698		215	71,992		215	68,812		215	74,729		215	74,987
	220	74,147		220	73,245		220	69,543		220	74,947		220	75,125
	225	74.236		225	73.856		225	69.332		225	74.752		225	75.012
	230	75,100		230	74,342		230	70,811		230	75,219		230	75,652
4.5	210	55,326	4.5	210	54,856	4.5	210	53,865	4.5	210	52,023	4.5	210	51,745
	215	56,314		215	55,123		215	54,169		215	52,869		215	51,658
	220	57,259		220	56,985		220	54,896		220	53,695		220	52,896
	225	58,965		225	59,001		225	55,896		225	54,754		225	54,585
	230	59,996		230	59,896		230	56,987		230	55,625		230	55,632
5.0	210	37,989	5.0	210	36,552	5.0	210	35,648	5.0	210	39,602	5.0	210	39,874
	215	38,654		215	37,472		215	36,182		215	40,226		215	40,325
	220	39,541		220	38,442		220	36,762		220	40,713		220	41,256
	225	39,987		225	39,152		225	37,421		225	41,160		225	42,015
	230	41,253		230	40,232		230	37,895		230	41,581		230	42,569