Research on the Influence of Image Linearization on Reconstruction Accuracy of Spectral Reflectance

Fig. 2. Root-mean-square error of textile samples before and after linearization in different order weighted polynomial regression algorithm. (a) Root-mean-square error of one order weighted polynomial regression algorithm; (b) root-mean-square error of two order weighted polynomial regression algorithm; (c) root-mean-square error of three order weighted polynomial regression algorithm; (d) root-mean-square error of four order weighted polynomial regression algorithm

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Table 1. Comparison of reconstruction accuracy of color cards
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Table 1. Comparison of reconstruction accuracy of color cards
Data Average ΔE₀₀
One order Two order Three order Four order
JPG 2.8327 2.1801 1.8171 1.9111
Linearized JPG 1.9569 2.1608 2.2505 2.2027

Table 2. Comparison of reconstruction accuracy of printed matter
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Table 2. Comparison of reconstruction accuracy of printed matter
Data Average ΔE₀₀
One order Two order Three order Four order
JPG 5.3947 3.2274 2.9301 2.9103
Linearized JPG 4.0478 3.7947 3.6756 4.8196

Table 3. Comparison of reconstruction accuracy of textile
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Table 3. Comparison of reconstruction accuracy of textile
Data Average ΔE₀₀
One order Two order Three order Four order
JPG 3.2985 2.1677 2.0617 2.0754
Linearized JPG 3.2165 2.9529 2.9220 2.4736

Table 4. Comparison of spectral reconstruction accuracy of color cards
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Table 4. Comparison of spectral reconstruction accuracy of color cards
Data Average RMSE
One order Two order Three order Four order
JPG 0.0230 0.0215 0.0242 0.0265
Linearized JPG 0.0310 0.0252 0.0234 0.0264

Table 5. Comparison of spectral reconstruction accuracy of printed matter
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Table 5. Comparison of spectral reconstruction accuracy of printed matter
Data Average RMSE
One order Two order Three order Four order
JPG 0.0538 0.0459 0.0499 0.0547
Linearized JPG 0.0584 0.0486 0.0553 0.1548

Table 6. Comparison of spectral reconstruction accuracy of textile
View table
Table 6. Comparison of spectral reconstruction accuracy of textile
Data Average RMSE
One order Two order Three order Four order
JPG 0.0834 0.0865 0.0862 0.0876
Linearized JPG 0.0872 0.085 0.0851 0.0856

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Xiaofan Fu, Yang Xu, Changjun Li. Research on the Influence of Image Linearization on Reconstruction Accuracy of Spectral Reflectance[J]. Laser & Optoelectronics Progress, 2021, 58(14): 1433001

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