Laser & Optoelectronics Progress, Volume. 58, Issue 22, 2230003(2021)
Multi-Spectral Color Data Dimension Reduction Model Research Based on Sparse Representation
Figures & Tables(6)
Fig. 1. RMSE distribution of each sample with SG color card as training set and Munsell color block as testset when each sample is reduced to six dimensions and reconstructed. (a) Spectral error distribution diagram obtained by PCA method; (b) spectral error distribution diagram obtained by SR method; (c) RMSE curve obtained by PCA method; (d) RMSE curve obtained by SR method
Fig. 2. Partial sample spectral reflectance curve, and reconstructed spectral curve based on PCA method and SR method. (a) Samples with high fitting degree; (b) samples of general fitness; (c) samples with poor fit
Fig. 3. Multispectral images from the University of Eastern Finland spectral image database. (a) Original image; (b) image reduced in dimension and reconstructed by SR method
Table 1. Comparison of spectral reconstruction accuracy between SR method and PCA method
View tableTable 1. Comparison of spectral reconstruction accuracy between SR method and PCA method
Dataset Dimension Method RMSE GFC /% Mean Max Min Mean Max Min Munsell-SG 6 PCA 0.017 0.048 0.003 99.825 99.999 98.066 SR 0.011 0.039 0.002 99.884 99.998 97.905 5 PCA 0.016 0.044 0.004 99.797 99.997 97.626 SR 0.015 0.040 0.002 99.828 99.994 97.620 4 PCA 0.020 0.068 0.004 99.626 99.995 93.961 SR 0.019 0.068 0.003 99.648 99.994 93.779 3 PCA 0.026 0.085 0.006 99.314 99.992 93.793 SR 0.025 0.086 0.003 99.375 99.984 93.485 SG-Munsell 6 PCA 0.068 0.655 0.005 99.298 99.993 76.455 SR 0.010 0.064 0.001 99.900 99.997 92.273 5 PCA 0.051 0.323 0.005 99.450 99.993 69.969 SR 0.015 0.066 0.002 99.805 99.997 91.971 4 PCA 0.047 0.253 0.005 99.383 99.993 77.736 SR 0.018 0.088 0.002 99.667 99.997 86.454 3 PCA 0.041 0.102 0.004 99.335 99.986 85.781 SR 0.025 0.098 0.002 99.415 99.994 84.614
Table 2. Comparison of chromaticity reconstruction accuracy between SR method and PCA method, under D65 light source
View tableTable 2. Comparison of chromaticity reconstruction accuracy between SR method and PCA method, under D65 light source
Dataset Method ΔE00 Mean Max Min Munsell-SG PCA 1.517 9.904 0.047 SR 0.451 2.328 0.049 SG-Munsell PCA 5.939 52.727 0.222 SR 0.430 4.675 0.011
Table 3. Average color difference comparison under different light sources
View tableTable 3. Average color difference comparison under different light sources
Dataset Method A C D65 D50 Munsell-SG PCA 1.399 1.528 1.517 1.453 SR 0.277 0.501 0.451 0.373 SG-Munsell PCA 6.251 5.972 5.939 6.072 SR 0.276 0.485 0.430 0.367
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Xinyi Fang, Xiaoxia Wan, Shuo Shi, Xiao Teng, Junyan Yu. Multi-Spectral Color Data Dimension Reduction Model Research Based on Sparse Representation[J]. Laser & Optoelectronics Progress, 2021, 58(22): 2230003
Paper Information
Category: Spectroscopy
Received: Jan. 22, 2021
Accepted: Feb. 12, 2021
Published Online: Nov. 10, 2021
The Author Email: Wan Xiaoxia (wan@whu.edu.cn)
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