In the picture below a generic data capture system (for OCR, ICR, OMR, Barcode Recognition).
As we can see a generic system is based of:
Scanning module, where there is the scanning of paper documents;
Classification Module, to classify the right template;
Recognition Module (OCR, ICR, OMR, Barcode Recognition) to extract the data from the images.
Validation Module: to validate the data extracted
Release Module, to write the information extracted and the images in txt files+ filesystem, ECM systems, ERP, etc..
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