Can Acrobat Perform OCR on Only Part of a PDF Page?
Question details
The user is looking to perform OCR (Optical Character Recognition) on a specific character, word, sentence, or paragraph within a scanned PDF, rather than processing the entire page.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Attempting to select or extract specific text from a scanned PDF where overlapping content or complex page layouts make selecting the recognized text difficult.
- Observed behavior
- Acrobat's standard text recognition processes the entire page by default and does not offer a native way to apply OCR to only a localized selection or paragraph.
Ensure you are using Acrobat Pro or a paid subscription of Adobe Acrobat, as the free Adobe Acrobat Reader does not include built-in OCR (Text Recognition) features.
Use the Crop Tool to Isolate Content Before OCR
Since Acrobat processes the entire page during OCR, you can crop the document to the specific area you need before running text recognition.
Adobe Acrobat does not natively support performing OCR on only a selected word, sentence, or paragraph. When you run text recognition, the software automatically scans and applies a text layer to the whole page.
To force Acrobat to recognize only a specific part of the page and avoid overlapping text issues, you can duplicate the file and crop the page down to your targeted area before using the OCR tool.
Open your scanned PDF in Acrobat Pro and save a copy (File > Save As) so you do not accidentally alter your original document.
Go to 'Tools' > 'Edit PDF' and select 'Crop Pages' from the top toolbar.
Drag a rectangle over the specific paragraph or area you want to recognize. Double-click inside the rectangle and click 'OK' in the dialog box to crop the page.
Go to 'Tools' > 'Scan & OCR' > 'Recognize Text' > 'In This File' and click 'Recognize Text'. Acrobat will now only process the isolated, cropped area.
Take a Snapshot for Third-Party Image OCR
If you prefer not to crop the document, you can capture the specific text area as an image and extract the text using an external tool.
Extract Specific Text Easily with WPS PDF Screen OCR
Instead of modifying your document with cropping tools or dealing with whole-page OCR limitations, WPS Office provides a smart 'Screen Capture OCR' feature. You can simply draw a box around any specific word, sentence, or paragraph in your PDF to instantly extract the exact text you need.
- 1. Open the PDF in WPS Office: Launch WPS Office and open your scanned document in the WPS PDF editor.
- 2. Activate Screen OCR: Navigate to the 'Tools' tab and click on the 'Screen Capture OCR' tool (or use the designated shortcut keys).
- 3. Select the specific area: Click and drag your cursor to draw a box around the specific word, paragraph, or graphical area on the page you wish to recognize.
- 4. Extract the text: Wait a moment as WPS Office instantly processes the selected area and extracts the text into a popup window.
- 5. Copy or save: Copy the accurately extracted text to your clipboard, or save it directly as a new text or Word document.
Frequently Asked Questions
Does Adobe Acrobat Reader have a free OCR feature?
No, Adobe Acrobat Reader is a free PDF viewing software and does not include OCR (text recognition) capabilities. You must upgrade to Acrobat Pro or a similar paid version to use OCR features.
Why is my PDF text overlapping when I try to copy it?
In scanned documents with complex layouts, the invisible text layer generated by standard whole-page OCR might misalign with the visible image layer. This makes selection very difficult, which is why isolating the text using a snapshot or area-specific OCR tool is often necessary.
Can I run OCR on multiple specific pages instead of the whole document in Acrobat?
Yes. In Acrobat Pro, you can specify a page range (for example, pages 2 to 5) when using the 'Recognize Text' tool. However, it will still process the entirety of those selected pages, not partial sections of an individual page.
