2D In Situ Method for Measuring Plant Leaf Area with Camera Correction and Background Color Calibration

Table 4

Comparison of leaf area measurement for Ligustrum quihoui.

Angle	Measurement area (mm^2)		Absolute errors (mm^2)		Relative errors (%)
	BCC	LAS	BCC	LAS	BCC	LAS
0°	1463.3004	1450.4980	3.9476	−8.8548	0.27%	−0.61%
45°	1477.5406	1446.1291	18.1878	−13.2237	1.25%	−0.91%
90°	1466.1804	1458.9959	6.8276	−0.3569	0.47%	−0.02%
135°	1456.7403	1463.6977	−2.6125	4.3449	−0.18%	0.30%
180°	1457.5403	1469.7848	−1.8125	10.432	−0.12%	0.71%
225°	1462.6604	1468.0799	3.3076	8.7271	0.23%	0.60%
270°	1439.3001	1466.1086	−20.0527	6.7558	−1.37%	0.46%
315°	1443.9401	1463.5512	−15.4127	4.1984	−1.06%	0.29%
360°	1466.3404	1465.9887	6.9876	6.6359	0.48%	0.45%
Average value	1459.2826	1461.426	−0.0702	2.0732	−0.01%	0.14%