Digital colorimetric analysis for estimation of iron in water with smartphone-assisted microfluidic paper-based analytical devices

Low-cost precision agriculture for sustainable farming using paper-based analytical devices

“…Some of the most well-known color spaces are RGB (red, green, and blue), CIELab (L: lightness, a: green–red axis, b: blue–yellow axis), and HSV (hue, saturation, and value). 40–42 Thus, the combination of the components of the three-dimensional models describes a color in space. 39,43 Colored images can be converted to grayscale to decrease the space needed for storage, taking up a third of the space initially required.…”

Microfluidic paper-based device coupled with 3D printed imaging box for colorimetric detection in resource-limited settings

“…The designed imaging box provides uniform lighting conditions, which leads to less signal noise and minimal variations in illumination of the object to be imaged. The top panel of the box has an opening for placing the image acquisition device such as a smartphone to acquire the images [36] , [37] . The side adjacent to this has an opening of 2 cm, allowing the user to insert a cuvette or test tube for imaging purposes.…”

Lab-on-a-chip technologies for food safety, processing, and packaging applications: a review

“…The application of microfluidic devices has also kindled interest in digitalization mainly due to the ease of testing in a short duration (Balasubramanian et al 2021 ). For instance, the use of smartphone-assisted LOC devices primarily involves performing the test using spot or lateral flow assay and positioning the detection zone for digital imaging (Ghosh et al 2019 ).…”