OCR ROI measures
Posted: Fri Jan 22, 2016 4:10 pm
We are using GDPicture Tesseract to read scanned invoices. Those invoices have a standardized region, where the invoice code ROI is (bottom right, 2cm from below and from the middle of a A4 page to the right side, defined in millimeters by banks). We tried setting the ROI with exact pixel coordinates, which worked, until some customers started to increase the DPI settings on their printers, which resulted in wrong readings due to wrong ROI coordinates. What is the best practice for such a case? Converting the MM to Inch and use those values as ROI in pixels?
Thanks in advance for any hint!
Thanks in advance for any hint!