The FDA app uses AR image targets to automatically recognize the meter box and overlay an interactive guide directly on the relevant control elements. This enables the readout process to be carried out across a wide variety of devices from different manufacturers, without requiring users to learn how to operate each machine individually.
Since most of the environments offer only weak or no internet connectivity, it was essential to perform text recognition locally on the device—rather than using the Azure Computer Vision Toolbox as initially planned. To achieve this, extensive evaluations were conducted to establish optimal starting conditions. Specific parameters were identified that can be adjusted based on the machine type, ensuring reliable text recognition even in highly diverse environments.