Written by Xiao Ling
Mobile document scanning has become a baseline feature for productivity apps — think expense reports captured from receipts, signed contracts photographed in a meeting room, or ID documents registered at a service counter. Building such a feature from scratch, handling perspective correction, edge detection, and multi-format export, is a significant engineering effort. In this tutorial we will walk through building DocScan, a Flutter document scanner that runs on both Android and iOS. The ap...