Scoreboard

Deterministic OCR: what a reader with no model gets right

The checked values each reader with no model reads from a PDF, on digital pages and on image pages.

Its key points, its tables, how it was scored and its log load from /api/public/scoreboards/deterministic-ocr.

Test documents

The four pages of Test set A and Test set B, two digital and two images: each page with a numbered bounding box on every checked value, and the answers.

Glossary

Term	Definition
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.