Field-level OCR or Zonal OCR is a special recognition scenario where only small areas of text are recognized. As the extracted information is used in further business processes, the quality of text recognition is very important. The “region of interest” of the relevant text is known in advance – and in this scenario, there are typically only a few different document variants.

By the way, in Field-level OCR scenarios, the zones are defined via code. As opposed to Field-level recognition, in the classic “document conversion” scenario, the automated layout analysis is very important because the text areas have to be determined first.