How do I ensure the best text recognition accuracy when using OCR on a paper invoice?

Scan your paper invoice at 300 dpi. This resolution provides enough detail for the OCR engine. Select the correct language for the text on the invoice before you start the recognition process. Make sure the scanned image is clear and not blurry, as poor image quality reduces accuracy.

How does using the OCR PDF API differ from performing OCR directly in the Acrobat desktop application?

Feature Acrobat Desktop App OCR PDF API. Method Manual user interface clicks Automated HTTP request Use Case Single document or small batches Large-scale processing, integration into workflows Control Direct visual feedback, interactive settings Programmatic control, part of a larger system Scalability Limited by manual effort Highly scalable for many documents

OCR Paper Invoice Sampling in Adobe Acrobat — How-to & AI prompts

AI prompts

1 way to ask · copy any one

CDecide — “help me choose”I have a box of paper invoices and a sampling list due this afternoon. The partner expects…+

I have a box of paper invoices and a sampling list due this afternoon. The partner expects searchable PDFs so I can pull specific invoice numbers quickly. I do not know which pages will OCR cleanly and which need manual correction. Tell me how to triage the stack fast, what OCR settings avoid misreading amounts, and one quick QC I can run before I hand the files for review.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open the scanned PDF or image file in Adobe Acrobat.
2
Go to the Tools menu and select Recognize Text.
3
In the Recognize Text dialog, click Recognize Text and choose In This File.
4
Adjust language and page settings if needed, then click Recognize Text to start OCR.
Best practiceFor best OCR accuracy, scan documents at 300 dpi and ensure the image is clear and not overly bright or dark.
5
After OCR completes, select and copy text directly from the PDF, or use Export PDF to save as an editable format such as Word.
NoteYou can now search, select, and edit the recognized text within Acrobat.

In the appWith the API

After OCR, you can highlight, copy, or edit the text just like a regular PDF document.

This runs in the Acrobat app - there is no separate API for this task.

Glossary

words on this page

OCROCR stands for Optical Character Recognition. It is technology that turns images of text into real text you can search and copy.ExampleAfter scanning a paper invoice, OCR allows you to copy the vendor's name from the image.

Searchable text layerThis is an invisible layer of text added to an image-based PDF, allowing you to search for words in the document.

DPIDPI means dots per inch, and it tells you how clear an image is when it is scanned.ExampleA scanned photo saved at 300 DPI will usually contain more detail than the same photo at 72 DPI.

Who does this

3 roles

ArchivistResearcherAdministrative Assistant

FAQ

about this task

Scan your paper invoice at 300 dpi. This resolution provides enough detail for the OCR engine.
Select the correct language for the text on the invoice before you start the recognition process.
Make sure the scanned image is clear and not blurry, as poor image quality reduces accuracy.

Acrobat shows this message because OCR is only for pages that are images. If a page already has real, selectable text, Acrobat cannot apply OCR. You should only use OCR on scanned documents or image-only PDFs.

A searchable text layer is an invisible layer of text added to an image-based PDF by OCR. It is important for digitized invoices because it allows you to search for words, copy text, and index the document. This makes finding information much faster and easier than looking through images.

If your scanned invoice is blurry, OCR will likely not work well. Blurry images make it hard for the software to recognize characters correctly. For good OCR results, always try to get a clear, sharp scan of your document, ideally at 300 dpi.

Feature	Acrobat Desktop App	OCR PDF API
Method	Manual user interface clicks	Automated HTTP request
Use Case	Single document or small batches	Large-scale processing, integration into workflows
Control	Direct visual feedback, interactive settings	Programmatic control, part of a larger system
Scalability	Limited by manual effort	Highly scalable for many documents

OCR Paper Invoice Sampling

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails