Aphid Identification and Counting Based on Smartphone and Machine Vision

Table 1

Part of the connection domain number, pixel values, and the relationship between the lengths of pests.

Pest category	The pixel value within the contour (contour number, pixel value, and aphid length/mm)
Aphid	(29, 41, 2.6)	(31, 28, 2.2)	(32, 35, 2.5)
	(34, 21, 2)	(35, 19, 1.9)	(36, 19, 1.9)
	(37, 20, 1.9)	(38, 21, 1.9)	(39, 27, 2.2)
	(43, 32, 2.2)	(44, 29, 2.2)	(45, 19, 1.8)
	(47, 20, 1.9)	(48, 20, 1.9)	(49, 42, 2.6)
	(50, 18, 1.9)	(51, 40, 2.6)	(53, 35, 2.5)
	(56, 25, 2.1)	(58, 19, 1.8)	(60, 23, 2.1)
	(61, 48, 2.8)	(63, 32, 2.4)	(64, 19, 1.9)
Nonaphids	(30, 2, 0.2)	(41, 4, 0.4)	(52, 6, 0.6)
	(42, 9, 0.9)	(54, 8, 0.9)	(57, 10, 1)
	(59, 9, 0.9)	(65, 10, 1)