Problems with photographs and scans.
WHAT AFFECTS ACCURACY MOST
Image quality Lighting Angle Handwriting Unusual layouts
HOW TO IMPROVE IT
Photograph straight on, not at an angle Good even light, no shadow across the document The whole document in frame Higher resolution Flat, not curled
WHAT IT STILL DOES BADLY
Precise counting Exact measurement Poor handwriting Very dense or complex layouts
WHAT TO ALWAYS VERIFY
Every extracted figure, against the original.
FOR RECEIPTS AND INVOICES
Check the total, always. A wrong figure in your records is a real problem.
FOR MULTI-PAGE DOCUMENTS
One page at a time produces better results than a stack.
WHAT NOT TO RELY ON
Anything where being wrong matters and you cannot check.
