Scan the site survey sheets to PDF, run OCR to recognize text and dimensions, convert the key drawings into editable f…
Open the scanned PDF file in Adobe Acrobat.
Go to the Tools menu.
Select Scan & OCR from the tools list.
Click Recognize Text and choose In This File.
In the settings panel, ensure PDF Output Style is set to Searchable Image.
Click Recognize to start the OCR process.
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.
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.
For the best OCR accuracy, you should scan documents at 300 DPI (dots per inch). Scanning at a lower resolution, like 72 DPI, will make the text recognition much less accurate and harder for Acrobat to read.
Acrobat shows this error because the page you are trying to OCR already has real, selectable text. The OCR feature is only for pages that are images of text. It cannot be used on pages where the text is already recognized and editable. You can check if the text is selectable before running OCR.
Yes, you can automate text recognition for many scanned PDFs. Adobe offers a PDF Services API with an 'OCR PDF' operation. This allows programs to send image-based PDFs to a server, which then returns PDFs with a searchable text layer. This is very useful for large archives or indexing systems.
| Feature | Regular PDF (image-only) | OCR'd PDF (searchable) |
|---|---|---|
| Text Selectability | Text is part of an image; cannot be selected or copied. | Text is recognized and can be selected, copied, and edited. |
| Search Function | Cannot search for specific words within the document. | Allows searching for any word or phrase in the document. |
| File Origin | Often created by scanning paper documents without text recognition. | Created from scans or images, then processed to add a text layer. |
| Accessibility | Less accessible for screen readers or text-to-speech tools. | More accessible, as text can be read aloud or converted. |