Acta Optica Sinica, Volume. 41, Issue 11, 1133001(2021)

Optimization of Colorimetric Characterization Target for Color Digital Cameras Based on Uniform Color Samples

Peng Xu1,2,3、*, Haijun Zhang2, Keqi Zhang1, Lei Mao1, Yuanfang Qiu1, and Jufeng Zhao4
Author Affiliations
  • 1Ningbo Yongxin Optics Co., Ltd., Ningbo, Zhejiang 315040, China
  • 2College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
  • 3Jiyang College of Zhejiang A&F University, Zhuji, Zhejiang 311800, China;
  • 4School of Electronics and Information Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China
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    Digital cameras usually build a colorimetric characterization model through target samples, which, however, will affect the mapping between the cameras’ response values and the colorimetric values. The existing selection methods for target samples ignore the generality of target samples, namely that the colorimetric characterization model built based on the optimized target samples should be applicable to any color samples. Therefore, we proposed an optimization method of colorimetric characterization targets for the digital cameras based on uniform color samples. First, uniform color samples were selected from the spectral reflectance of extensive real objects. Then, the colorimetric characterization model was combined to optimize the target samples among the uniform color samples. The results show that the optimization of target samples is subject to the data type and the colorimetric characterization model. Consequently, different optimized target samples are obtained, and the optimized target samples outperform the typical target samples in terms of colorimetric characterization. In addition, for the RAW data, an increase in the number of target samples does not necessarily improve the accuracy of a linear colorimetric characterization model, while for the sRGB data, more target samples will be beneficial for enhancing the performance of a polynomial colorimetric characterization model.

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    Peng Xu, Haijun Zhang, Keqi Zhang, Lei Mao, Yuanfang Qiu, Jufeng Zhao. Optimization of Colorimetric Characterization Target for Color Digital Cameras Based on Uniform Color Samples[J]. Acta Optica Sinica, 2021, 41(11): 1133001

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    Paper Information

    Category: Vision, Color, and Visual Optics

    Received: Nov. 16, 2020

    Accepted: Jan. 8, 2021

    Published Online: Jun. 7, 2021

    The Author Email: Xu Peng (xsjzxp@163.com)

    DOI:10.3788/AOS202141.1133001

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