@inproceedings{cc370e496bb34560a27c0c4842ad7090,
title = "Smartphone Modulated Colorimetric Reader with Color Subtraction",
abstract = "Color analysis has been essential for the interpretation of optical readouts, e.g. colorimetry, fluorescence, spectroscopy, and scanometry. However, existing colorimetric readers can hardly eliminate the color interference of colored solutions, e.g., interpreting pH test strips to assess the pH value of red wine. This paper introduces a smartphone modulated colorimetric reader that is compatible with most smartphone models and a novel color subtraction algorithm that eliminates color interferences due to colored solutions. Experiments were conducted to validate the effectiveness of the developed reader and algorithm on evaluating pH test strips produced from transparent and colored solutions using multiple smartphone models. Applicability of the developed reader was demonstrated through its interpretation of pH test strips measuring pH values of colored and non-transparent food samples including red wine and milk.",
keywords = "color subtraction, colorimetry, low-cost, portable, smartphone, versatile",
author = "Y. Zhao and Choi, \{S. Y.\} and J. Lou-Franco and Nelis, \{J. L.D.\} and H. Zhou and C. Cao and K. Campbell and C. Elliott and K. Rafferty",
note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 18th IEEE Sensors, SENSORS 2019 ; Conference date: 27-10-2019 Through 30-10-2019",
year = "2019",
month = oct,
doi = "10.1109/SENSORS43011.2019.8956565",
language = "English",
series = "Proceedings of IEEE Sensors",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2019 IEEE Sensors, SENSORS 2019 - Conference Proceedings",
address = "United States",
}