| OCR |
Optical character recognition: reading the text, tables and marks of a page from its image or PDF. |
| engine |
An OCR product or model that reads a page and returns its text, such as Mistral OCR, Landing AI or Reducto. |
| block |
One part of a page as an engine returns it: a paragraph, a table, a heading or a figure. |
| bounding box |
The rectangle that marks where something is printed on the page. |
| table cell |
One value of a table, where a row and a column meet. |
| form field |
A label on a form and the value written for it. |
| grounding |
Linking each value of a reading to its bounding box on the page. |
| ground truth |
The correct answers for a page, one fact per value, checkbox, choice or signature. Every reading is scored against them. |
| test set |
The pages a scoreboard is measured on, with their ground truth. |
| grader |
The program or model that compares a reading with the ground truth and counts what is right. |