Table 1.

Comparisons of counting accuracy of two recognition algorithms for eight different varieties

Maize varieties	Number of kernels	Hough circle detection algorithm				Proposed algorithm
		Number of correctly recognized	False-positive number	False-negative number	Correct rate (%)	Number of correctly recognized	False-positive number	False-negative number	Correct rate (%)
Zhengdan 958	204	182	6	22	89.2	191	0	13	93.6
Xianyu 688	1181	971	9	210	82.2	1140	2	41	96.5
Fudan No. 3	1531	1208	51	223	78.9	1500	30	31	97.9
Xianyu 335	579	532	19	47	91.9	554	3	25	95.7
Jinnuo 685	854	743	33	111	87.0	804	15	50	94.1
Jingkenuo 2016	655	579	38	76	88.4	631	2	24	96.3
Beibainuo No. 0	548	489	43	59	89.2	513	8	35	93.6
Zhengbai No. 1	382	350	49	32	91.6	373	13	9	97.6