Pre-processing of envelope images for optical character recognition
Andrew C. Downton, C.G. Leedham · 1988
A feasibility study was undertaken to investigate methods of preprocessing envelope images to extract the address region from the image in the presence of the other data and presort the addresses into subclasses suitable for recognition by an optical character recognition system with separate recognition channels for machine and handwritten address classes. Preliminary results are presented that are based on trials using a sample of nearly 1000 envelope images. The data show a successful address extraction rate of around 98% and a correct classification rate of about 90%.>