How do I fix text recognition errors after scanning a paper form?

First, open your scanned PDF in Adobe Acrobat. Go to 'All tools' and select 'Scan & OCR'. Choose 'In this file' and then 'Recognize Text'. Acrobat will create a searchable text layer. You can then use the 'Fix text recognition errors' tool to correct any mistakes in the recognized text. This tool highlights potential errors for you to review.

What is the difference between a scanned image of text and a searchable text layer?

Feature Scanned Image of Text Searchable Text Layer. Nature A picture of words, like a photo. Actual, editable text on top of the image. Select/Copy Cannot select or copy words. Can select, copy, and edit words. Search Cannot search for words. Can search for any word in the document. File Size Often larger, as it's an image. Slightly larger than image, but adds functionality.

Paper Forms OCR Errors in Adobe Acrobat — How-to & AI prompts

AI prompts

1 way to ask · copy any one

DBecome — “help me grow”Looking at our backlog of scanned forms and OCR logs, show the recurring error types (e.g.,…+

Looking at our backlog of scanned forms and OCR logs, show the recurring error types (e.g., decimal misreads, column shifts, illegible handwriting) and recommend one procedural change and one tool or setting that would reduce manual correction time by half. Tell me how to check accuracy efficiently for numeric columns.

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 in Adobe Acrobat.
2
Check if the document is an image-only PDF by attempting to select or search for text.
NoteOCR cannot recognize text if the PDF does not contain images or if the text is already selectable.
3
Go to Tools and select Recognize Text.
4
Click Recognize Text and choose In This File.
5
Review the OCR output for errors or missed text by scrolling through the document.
6
If OCR accuracy is poor, check the scan quality: ensure the document is at least 300 dpi, not skewed, and has high contrast.
Best practiceLow-resolution, blurry, or skewed scans are the most common causes of OCR failure.
7
Rescan the original document at 300 dpi or higher, using RGB mode for discolored or older pages.
Best practiceFor best results, avoid scanning with excessive brightness and ensure pages are flat and unmarked.
8
Repeat the OCR process on the improved scan.
9
Manually correct any remaining OCR errors by clicking on suspect words to edit and accept corrections directly.
NoteYou can click on suspect words to edit and accept corrections directly.
10
Save the corrected PDF.

In the appWith the API

If OCR still fails, try rescanning your document at a higher resolution and check for skewed or blurry pages before running OCR again.

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.

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.

Searchable layerA searchable layer is hidden text that Acrobat adds to a scanned document. This lets you search for words in the document.

The real tasks

the one, listed here

We keep accumulating paper forms and OCR errors cost me hours each month re-checking values before analysis.

FAQ

about this task

First, open your scanned PDF in Adobe Acrobat.
Go to 'All tools' and select 'Scan & OCR'.
Choose 'In this file' and then 'Recognize Text'.
Acrobat will create a searchable text layer.
You can then use the 'Fix text recognition errors' tool to correct any mistakes in the recognized text. This tool highlights potential errors for you to review.

Acrobat's OCR feature is designed for pages that are only images. If a page already contains actual text, not just a picture of text, Acrobat will not perform OCR. You might see an error message like 'page contains renderable text'. This means the page already has text that can be selected and copied, so OCR is not needed for it.

For the most accurate OCR results on paper forms, you should scan your documents at 300 dpi (dots per inch). Scanning at a higher resolution helps Acrobat recognize text more clearly, reducing the number of errors. While 72 dpi is the lowest acceptable quality, 300 dpi gives much better accuracy.

If your scanned document is in a language other than English, it's very important to select the correct OCR language before you start the recognition process. In the 'Scan & OCR' tool, you will find an option to set the language. Choosing the right language helps Acrobat's OCR engine understand the specific characters and grammar rules, leading to much more accurate text recognition.

Feature	Scanned Image of Text	Searchable Text Layer
Nature	A picture of words, like a photo.	Actual, editable text on top of the image.
Select/Copy	Cannot select or copy words.	Can select, copy, and edit words.
Search	Cannot search for words.	Can search for any word in the document.
File Size	Often larger, as it's an image.	Slightly larger than image, but adds functionality.

Paper Forms OCR Errors

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails