Sensors (Dec 2022)

Investigation of the Hue–Wavelength Response of a CMOS RGB-Based Image Sensor

  • Hyeon-Woo Park,
  • Ji-Won Choi,
  • Ji-Young Choi,
  • Kyung-Kwang Joo,
  • Na-Ri Kim

DOI
https://doi.org/10.3390/s22239497
Journal volume & issue
Vol. 22, no. 23
p. 9497

Abstract

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In this study, a non-linear hue–wavelength (H-W) curve was investigated from 400 to 650 nm. To date, no study has reported on H-W relationship measurements, especially down to the 400 nm region. A digital camera mounted with complementary metal oxide semiconductor (CMOS) image sensors was used. The obtained digital images of the sample were based on an RGB-based imaging analysis rather than multispectral imaging or hyperspectral imaging. In this study, we focused on the raw image to reconstruct the H-W curve. In addition, several factors affecting the digital image, such as exposure time or international organization for standardization (ISO), were investigated. In addition, cross check of the H-W response using laser was performed. We expect that our method will be useful as an auxiliary method in the future for obtaining the fluor emission wavelength information.

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