Mobile Device Based Water Monitoring with Single Reference Image

Abstract

Abstract-In this study, we report a low-cost and portable smartphone spectrometer system to monitor water quality based on the use of the built-in camera for capturing a single-use reference image. The images are spectrum view of the assays after flash light of the camera passes through the assays. The system processes the reference images in training step and creates a reference model for the calculation of unknown concentration assays in real experimental conditions. An experimental investigation for detection of methylene blue (MB) in water, relying on color change of the spectrum view due to concentration level, shows that the proposed system is able to calculate the concentration level accurately with a significantly reduced cost.Index Terms-image processing, smartphone spectrometer, color matching.