基于神经网络的籽棉颜色分级检测

doi:10.13475/j.fzxb.20190502707

摘要/Abstract

摘要：

为解决籽棉颜色分级问题,构造了一个基于L^*a^*b^*颜色空间的色度检测仪,主要由颜色传感器、光源及外围电路构成。针对用于籽棉颜色等级检测2个关键指标(反射率、黄度)输出不稳定问题,采用了4层BP神经网络和5块标准色板进行反复训练,使得校准后的反射率的变异系数小于0.21%,黄度的变异系数小于1.13%。在籽棉颜色等级检测实验中,制作了覆盖12个颜色等级的480个测试样。经过反复实验发现,使用该色度检测仪对1个测试样品,需要均匀分布10个测量点结果的平均值,才能得到稳定的色度测量值。最后,采用神经网络方法,对480个籽棉试样数据进行分析,其中:80%用于训练;20%用于识别。实验结果表明,对12个颜色等级的480个样品进行测试,得到的检测准确率都超过了90%。

关键词: 籽棉, 籽棉颜色分级, 颜色传感器, 人工神经网络

Abstract:

In order to solve the problem of color classifying for seed cotton, a detection device based on L ^*a^*b^* color space, which is mainly composed of color sensor, light source and peripheral circuit, was designed. Aiming at the unstable output of reflectance and yellowness, which are very important for color grading, a four layers BP neural network was used and trained repeatedly with 5 standard color boards. After the calibration, the rectified reflectance has coefficient of variation with less than 0.21% and the rectified yellowness has coefficient of variation with less than 1.13%. In the next experiment,480 specimen of seed cotton which cover up 12 color grades is prepared. After repeated experiments, it is found that the average value of 10 measurement points, which are evenly distributed in one specimen, could be used as color value for a test sample. Finally, a neural network was applied to analyze the 480 seed cotton sample data, of which 80% was used for training and 20% for identification. Experiment results show that the detection accuracy is more than 90% for all 12 color grades.

Key words: seed cotton, color grade of seed cotton, color sensor, neural network

中图分类号:

S562

徐守东, 冷奕锦, 吴国新. 基于神经网络的籽棉颜色分级检测[J]. 纺织学报, 2020, 41(10): 34-40.

XU Shoudong, LENG Yijin, WU Guoxin. Research on color grading of seed cotton based on neural network[J]. Journal of Textile Research, 2020, 41(10): 34-40.

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序号	白板		棕色板		黄色板		灰色板		中色板
序号	R_d	+b	R_d	+b	R_d	+b	R_d	+b	R_d	+b
标准值	78.400	4.800	57.200	12.400	70.400	14.600	56.100	2.800	73.100	8.300
实测值1	78.591	4.713	57.019	12.313	70.505	14.673	55.684	2.721	73.233	8.269
实测值2	78.496	4.875	57.028	12.436	70.424	14.638	56.100	2.845	73.245	8.278
实测值3	80.491	4.499	57.407	12.509	70.399	14.612	56.192	2.947	73.346	8.241
实测值4	77.214	4.884	57.275	12.473	70.464	14.665	56.061	2.775	72.951	8.369
实测值5	78.397	4.916	56.828	12.254	70.433	14.643	56.347	2.906	73.248	8.268
实测值6	78.123	5.060	57.259	12.471	70.332	14.549	56.093	2.550	73.084	8.320
实测值7	78.185	4.835	57.034	12.314	70.383	14.564	56.224	2.746	72.975	8.387
实测值8	78.025	4.937	57.229	12.251	70.342	14.556	56.085	2.597	72.786	8.340
实测值9	78.890	4.775	57.199	12.465	70.255	14.513	56.215	2.887	73.223	8.300
实测值10	79.271	4.543	57.264	12.531	70.374	14.567	56.115	2.714	73.307	8.183
实测平均值	78.568	4.804	57.154	12.402	70.391	14.598	56.111	2.769	73.140	8.295
实测标准差	0.869	0.176	0.171	0.107	0.071	0.055	0.174	0.131	0.182	0.061
实测离差	0.168	0.004	-0.046	0.002	-0.009	-0.002	0.011	-0.031	0.040	-0.005
离差百分比/%	0.210	0.070	-0.080	0.010	-0.010	-0.010	0.020	-1.110	0.050	-0.050

样品	色泽	10次		20次		30次		40次		50次
样品	色泽	均值	标准差	均值	标准差	均值	标准差	均值	标准差	均值	标准差
白棉1级	R_d	83.58	1.03	83.81	0.92	83.72	0.92	83.56	0.91	83.51	0.91
	+b	8.44	0.69	8.27	0.67	8.46	0.67	8.54	0.62	8.52	0.60
白棉2级	R_d	82.62	0.88	82.38	0.87	81.69	0.88	81.59	0.88	81.71	0.87
	+b	8.14	0.29	8.18	0.29	8.40	0.28	8.45	0.28	8.35	0.27
白棉3级	R_d	82.32	1.16	82.36	1.16	81.46	1.16	81.22	1.15	81.26	1.15
	+b	7.32	0.78	7.10	0.67	7.36	0.70	7.38	0.66	7.39	0.61
白棉4级	R_d	75.27	2.21	74.59	1.68	74.63	1.37	74.71	1.19	74.79	1.07
	+b	8.05	0.50	8.09	0.44	7.97	0.41	7.93	0.38	7.89	0.35
白棉5级	R_d	68.28	0.69	68.96	0.68	69.63	0.68	70.21	0.66	70.60	0.65
	+b	7.79	0.54	7.60	0.53	7.46	0.55	7.37	0.54	7.29	0.53
淡点污棉1级	R_d	79.79	1.07	79.54	1.08	79.34	1.07	79.10	1.06	79.10	1.05
	+b	9.83	0.18	9.94	0.16	9.93	0.17	9.92	0.15	9.93	0.14
淡点污棉2级	R_d	74.87	0.58	74.75	0.62	74.87	0.58	74.86	0.57	74.84	0.54
	+b	10.08	0.27	10.06	0.26	10.05	0.27	10.04	0.25	10.04	0.24
淡点污棉3级	R_d	65.73	0.85	65.89	0.83	66.43	0.85	66.79	0.85	66.82	0.84
	+b	8.66	0.06	8.65	0.06	8.68	0.05	8.70	0.05	8.70	0.04
淡黄染棉1级	R_d	79.17	1.58	77.87	1.55	78.08	1.55	78.12	1.50	78.09	1.51
	+b	12.21	0.27	12.19	0.27	12.15	0.25	12.15	0.23	12.14	0.22
淡黄染棉2级	R_d	71.68	1.41	72.01	1.19	71.82	1.19	71.94	1.09	71.92	1.02
	+b	11.69	0.52	11.61	0.44	11.71	0.45	11.59	0.48	11.60	0.46
淡黄染棉3级	R_d	58.97	0.33	59.32	0.34	59.59	0.32	59.78	0.30	59.77	0.31
	+b	10.72	0.17	10.51	0.17	10.26	0.19	10.13	0.17	10.13	0.18
黄染棉1级	R_d	70.27	2.86	70.13	2.77	72.00	2.61	72.06	2.48	72.30	2.37
	+b	14.75	0.34	14.54	0.36	14.31	0.35	14.29	0.34	14.28	0.34

序号	标准棉样等级	分类准确率	识别率
1	白棉1级	95.0	97.9
2	白棉2级	100.0	92.7
3	白棉3级	92.5	95.8
4	白棉4级	100.0	91.6
5	白棉5级	100.0	100.0
6	淡点污棉1级	100.0	92.7
7	淡点污棉2级	100.0	94.8
8	淡点污棉3级	100.0	90.6
9	淡黄染棉1级	92.5	96.9
10	淡黄染棉2级	100.0	96.9
11	淡黄染棉3级	100.0	100.0
12	黄染棉1级	100.0	100.0