Dough-Stage Maize (Zea mays L.) Ear Recognition Based on Multiscale Hierarchical Features and Multifeature Fusion

Table 2

Average environmental parameters during the first image acquisition.

Shooting period	7:00–8:30	10:00–11:30	12:00–13:30	15:00–16:30	18:00–19:30
Mean solar altitude (°)	28.71	56.53	58.93	33.78	1.46
Mean solar azimuth (°)	98.22	155.95	194.43	252.16	309.88
Light color temperature (K)	10293	20221	20149	9872	2593
PM 2.5 (μg·m^−3)	14	12	12	11	23

Notes. PM 2.5 designates the fine particulate matter that is less than 2.5 μm.