TinkerThe invoice at 1,600 px, not read yet.
Chapter 4 of 7
Pulling fields out
Accounts wants each invoice’s number, date, order, total and terms typed into the books. The assistant can pull them out, but someone has to know whether it got them right.
This chapter: How do you check an extraction field by field?
You will learn
- What extracting fields from a document means
- Why grading each field finds what one overall score hides
- How OCR and vision compare on cost for clean print
Words you’ll meet (3)
- Extraction
- Pulling named fields (a total, a date) out of a document into a fixed form.
- Field
- One named value the form needs, like the invoice number.
- Reference
- The right value for each field, written by a person, that the extraction is graded against.
The picture on the left is live. Each step below asks you to do one thing in it; the story continues here as you go.
Step 1 of 4
Extraction means pulling named fields out of a document into a fixed form: here the invoice’s number, date, order number, total and payment terms. Each field is graded against a reference, the right value written by a person, with the Evals module’s key-fact check. Before you run it: