How do I make sure the OCR on my student essays works well?

Scan documents at 300 dpi for clearer text recognition. Always select the correct language for the text before starting the OCR process. Ensure the pages you are trying to OCR are image-only, not pages with existing selectable text.

OCR Student Essays in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Run OCR on the scanned student essays from [month=last month] so the text is searchable, export…+

Run OCR on the scanned student essays from [month=last month] so the text is searchable, export the corrected PDFs to a folder named [folder=Essay Samples], and confirm OCR accuracy for [N=5] random pages by [deadline=Friday].

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

BImprove — “do it better”Make the essay archive usable: run OCR on all scans, correct common recognition errors for…+

Make the essay archive usable: run OCR on all scans, correct common recognition errors for names and rubric terms, tag each essay with student [name] and skill level in metadata, and export searchable PDFs to Essay Samples so I can quickly search for examples of specific skills at conference time.

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 file in Adobe Acrobat.
2
Go to the Tools menu.
3
Select Scan & OCR from the tools list.
4
Click Recognize Text and choose In This File.
5
In the settings panel, ensure PDF Output Style is set to Searchable Image.
6
Click Recognize to start the OCR process.
7
Save the PDF after OCR is complete.
Best practiceFor best OCR accuracy, scan your documents at 300 dpi and ensure the images are clear before running OCR.

In the appWith the API

After OCR completes, you can search, copy, and highlight text in your previously scanned PDF.

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 PDFA searchable PDF is a document where you can look for words, even if it started as a scanned image.ExampleEven though it was a scan, the searchable PDF let me find every instance of 'warranty' 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

ArchivistResearch LibrarianRecords Manager

FAQ

about this task

Scan documents at 300 dpi for clearer text recognition.
Always select the correct language for the text before starting the OCR process.
Ensure the pages you are trying to OCR are image-only, not pages with existing selectable text.

A searchable text layer is like an invisible cover over your scanned document. It contains real text that matches the images of words. This matters because it allows you to search for words, copy text, and index your scanned student essays, making them much more useful than simple image files.

No, if your scanned student essay already has digital text that can be selected, Acrobat's OCR will not work on that page. OCR is designed only for pages that are purely images. You will see an error message if you try to run OCR on such a page.

Choosing the correct language for OCR is very important because it tells Acrobat which dictionary and character sets to use. If you pick the wrong language, the OCR engine will make more mistakes, leading to incorrect words and less accurate search results in your student essays. This makes the document harder to use.

Yes, you can fix mistakes that OCR makes. After running OCR, Acrobat provides tools to correct text recognition errors. This lets you manually adjust any words that were not correctly identified by the OCR process, making sure your scanned student essays are fully accurate and searchable.

OCR Student Essays

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails