Evaluation Method of Fabric Color Difference Based on Saliency Algorithm and CIELAB Space

Fig. 1. Flow chart of evaluation method of fabric color difference based on saliency algorithm and CIELAB space integration. (a) Analysis of area and roundness of fabric texture clearance region; (b) preliminary color difference classification; (c) further color difference classification

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Fig. 2. (a) Area and (b) roundness distribution of texture clearance region

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Fig. 3. Test results of image processing by algorithm. (a) Fabric image; (b) saliency map of fabric color difference; (c) binary image of fabric serious color difference; (d) binary image of fabric serious color difference beyond texture clearance region

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Table 1. Relationship between fabric color difference and color difference grade
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Table 1. Relationship between fabric color difference and color difference grade
Colordifference Colordifferencegrade Colordifference Colordifferencegrade
>11.85 1 2.16-3.05 3-4
8.41-11.85 1-2 1.27-2.15 4
5.96-8.40 2 0.20-1.26 4-5
4.21-5.95 2-3 <0.2 5
3.06-4.20 3

Table 2. Result of further color difference classification

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Table 2. Result of further color difference classification

Pixel ratio	Value
Pixel ratio	Tested hotpink fabric 2	Tested dodgerblue fabric 2	Tested violetred fabric 2
P₅	1%	1%	1.5%
P_4.5	36%	46%	74.5%
P₄	29%	41%	24%
P_3.5	22%	12%	0
P₃、P_2.5、P₂、P_1.5、P₁	0	0	0
Weighted sum	3.96	4.18	4.38
Comprehensivecolor differencegrade	4	4	4.5

Table 3. Result of fabric color difference classification

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Table 3. Result of fabric color difference classification

Testedfabric	Proposedmethod	Histogramcrossover algorithm	CIELABcolor space	Colorimeter	Expertevaluation
Tested hot pink fabric 1	1	2.5	3	1.5	1
Tested hot pink fabric 2	4	4	3	4.5	4
Tested dodger blue fabric 1	1	3.5	3.5	3	1.5
Tested dodger blue fabric 2	4	4	4	4.5	4.5
Tested violet red fabric 1	1	3	4.5	2	2
Tested violet red fabric 2	4.5	4	4	4.5	4.5
Mean error	0.3333	0.9167	1.4167	0.4167	-
Variance	0.1389	0.4514	0.6181	0.2847	-

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Xiuping Meng, Gongbing Su, Qiming Wu, Langjia Yuan. Evaluation Method of Fabric Color Difference Based on Saliency Algorithm and CIELAB Space[J]. Laser & Optoelectronics Progress, 2018, 55(5): 053301

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