基于H-S直方图的苹果着色率检测算法研究

doi:10.16180/j.cnki.issn1007-7820.2021.05.003

Abstract

Abstract:

In order to solve the problem that the detection result of apple color by machine vision is easily affected by the brightness of the picture, an algorithm of apple skin color rate detection based on H-S histogram is proposed in this study. The algorithm use a small number of samples of red, green and yellow colors to generate different H-S histograms. When detecting the coloring rate, the hue value and saturation value of each pixel in the image are extracted, and the H-S histogram is used to analyze the proportion of the red area on the surface of the apple to obtain the coloring rate of the apple surface. The test results prove that this method can effectively detect the coloring rate of the apple surface. The detection results obtained are basically consistent with those observed by human eyes. The average error is less than 8.3%, and the detection results are not easily affected by the brightness of the picture.

Key words: machine vision, HSV, RGB, hue, saturation, color space conversion, H-S histogram, color detection

CLC Number:

TP391

YANG Lingxiao,WANG Zhenying,LIU Qunpo,WANG Gaowei,YANG Yanchao. Study of Apple Coloration Detection Algorithm Based on H-S Histogram[J].Electronic Science and Technology, 2021, 34(5): 13-17.

Figures/Tables 8

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References 16

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亮度	人工观测结果	文献[15]方法检测结果	本文方法检测结果
V	0.30	0.316 6	0.308 5
0.8V	0.30	0.420 0	0.308 2
0.6V	0.30	0.700 0	0.305 8
0.4V	0.30	0.659 8	0.307 9

样本序号	人眼观测结果	本文算法检测结果	相对误差	误差绝对值
1	0.90	0.859 0	-0.046	0.046
2	0.90	0.989 0	0.099	0.099
3	0.25	0.267 0	0.068	0.068
4	0.90	0.911 0	0.012	0.012
5	0.85	0.864 0	0.016	0.016
6	0.55	0.547 0	-0.005	0.005
7	0.50	0.360 0	-0.280	0.280
8	0.95	0.908 0	-0.044	0.044
9	0.30	0.316 0	0.053	0.053
10	0.90	0.907 0	0.008	0.008
11	0.95	0.960 3	0.011	0.011
12	0.50	0.635 0	0.270	0.270
13	0.60	0.612 0	0.020	0.020
14	0.70	0.658 5	-0.059	0.059
15	0.80	0.785 0	-0.019	0.019
16	0.40	0.557 0	0.393	0.393
17	0.70	0.676 0	-0.034	0.034
18	0.80	0.714 0	-0.108	0.108
19	0.70	0.677 0	-0.033	0.033
20	0.60	0.649 0	0.082	0.082
平均值	0.687 5	0.692 59	0.020 2	0.083

Study of Apple Coloration Detection Algorithm Based on H-S Histogram

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