Abstract
We propose a finger-wearable motion sensing system for handwriting recognition in the air. The hardware consists of a miniature inertial measurement unit (IMU) on a ring with a Bluetooth Low Energy (BLE) transceiver to a computer that then performs feature extractions and classification based on support vector machine (SVM) to recognize the written characters. We tested our system on Graffiti alphabet, and experimental results show a recognition rate of 96% and 91% on user-dependent and user-independent recognition, respectively.