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Efficient spectral reconstruction using a trichromatic camera via sample optimization

Abstract

Training-based multispectral reconstruction can effectively recover spectral reflectance of captured objects using a trichromatic camera. However, existing methods are based on synthesized data, and the sizes of training sample set (e.g., multispectral images, reflectance targets) are usually large. In this paper, we present a spectral reconstruction approach using real measured data. To improve the efficiency and accuracy of spectral reconstruction, we propose a volume maximization method for sample optimization without any prior knowledge of light and cameras. We use heuristic global search algorithms to optimize samples and give an efficient spectral reconstruction method which is suitable for sparse sampling. Experimental results show that the proposed sample selection method outperforms other existing methods in terms of both spectral and colorimetric reconstruction errors. Moreover, the proposed reconstruction method achieves higher efficiency and accuracy due to lower sample redundancy.

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Acknowledgements

The work in this paper has been supported by the National Natural Science Foundation of China (Grant Nos. 61602268, 61603202, 61571247), the National Natural Science Foundation of Zhejiang Province (Nos. LY13F020050, LZ16F030001), and the K.C.Wong Magna Fund in Ningbo University.

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Correspondence to Yuqi Li.

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Li, Y., Wang, C., Zhao, J. et al. Efficient spectral reconstruction using a trichromatic camera via sample optimization. Vis Comput 34, 1773–1783 (2018). https://doi.org/10.1007/s00371-017-1469-3

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Keywords

  • Spectral reconstruction
  • Sample optimization
  • Multispectral images