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Digital image colorimetry on smartphone for chemical analysis: A review

期刊

MEASUREMENT
卷 171, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2020.108829

关键词

Digital image colorimetry; Chemical analysis; Color space; Smartphone; Digital application

资金

  1. Natural Science Foundation of Hunan Province, China [2020JJ4940, 2018JJ2671]
  2. Science and Technology Innovation Platform and Talent Plan of Hunan Province, China [2017TP1022]
  3. Scientific Innovation Fund for Post-graduates of Central South University of Forestry and Technology [CX20192024]

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Digital image colorimetry (DIC) on smartphone is a powerful, fast, and cost-effective analysis method for measuring target analytes through color changes in digital images. It is currently used in various fields with revealed advantages and disadvantages. In the future, DIC technology will become more robust and reliable with the continuous development of smartphone technology.
Digital image colorimetry (DIC) on smartphone is regarded as a powerful, fast and low-cost analysis method to measure target analyte with color changes of digital image obtained by the built-in camera. We summarized the basic procedure of DIC, the color spaces (RGB, CMYK, HSB/HSL, CIE XYZ, L*a*b*, and YUV), the principal architectures (tools for capturing image, lighting conditions, and color quantification APPs and DIC APPs), and current status of DIC on smartphone in analysis of metals/heavy metals, herbicides, pesticides, antibiotics, biological and medical indicators, natural compounds, and bacteria/viruses. The advantages and disadvantages of DIC are also revealed. Nowadays, DIC on smartphone must be further refined with controlled geometry and standard lighting sources to become robust and reliable analytical procedures. And it will be improved in the near future with the continuous development of smartphones owing to the rapid development of smartphone's camera technology and the continuous optimization of related software.

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