Lateral flow assays (LFA) tests have become ubiquitous within the general public; they are the format for standard home pregnancy and Covid-19 tests, indicating a positive result with a colored line, and a negative result with no colored line. In their current iteration, these tests are largely qualitative and binary in their outputs. Various attempts to make a quantitative LFA have yielded complications due to the optical basis of a quantitative test — scattered stray light and faint images. Since Covid has catapulted LFAs into the daily lives of many,…
