How to Fix the Image Too Wide Error During Adobe Acrobat OCR
Question details
The user needs to resolve an error preventing OCR processing on large engineering drawings due to the image dimensions exceeding software limits.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- not provided
- Scenario
- Attempting to perform Optical Character Recognition (OCR) on a large scanned engineering drawing within Adobe Acrobat.
- Observed behavior
- Adobe Acrobat displays an error stating the image is too wide for OCR, and attempting to crop the document removes existing OCR data, preventing successful processing of the full document.
Before adjusting the resolution or modifying your files, save a backup copy of your original scanned drawing to ensure no data is permanently lost during the troubleshooting process.
Adjust the Image Resolution to Reduce Physical Dimensions
Increasing the DPI (Dots Per Inch) of your scan reduces the physical dimensions of the document, allowing Acrobat to bypass the width limit without losing image quality.
The 'too wide' error is typically caused by incorrect image resolution rather than the actual file size. If a large drawing is scanned at a very low resolution, such as 72 DPI, the software interprets its physical dimensions (in inches or centimeters) as excessively large.
By modifying the DPI to standard print resolution (288 or 300 DPI) without resampling the image, you can shrink the physical width so the OCR engine can process it properly.
Launch an image-processing application like Adobe Photoshop and open your scanned engineering drawing.
Navigate to the top menu, click on 'Image', and select 'Image Size'.
Uncheck the 'Resample' box. This ensures that the total pixel count of your drawing remains untouched and no visual data is lost.
Change the 'Resolution' value from its current low number (e.g., 72) to 300 Pixels/Inch. You will notice the physical document dimensions decrease automatically.
Save the modified image as a PDF, open it in Adobe Acrobat Pro DC, and run the OCR tool again.
Scan and Assemble the Document in Sections
If adjusting the DPI is not sufficient or the drawing is still too large, scan the document in overlapping sections and stitch them together before running OCR.
Utilize a Wide-Format Scanner
For exceptionally large schematics and engineering drawings, using a specialized wide-format scanner prevents dimension errors natively.
Use WPS PDF to Extract Text from Complex Drawings
WPS Office includes a robust PDF editor equipped with a highly accurate built-in OCR engine. It efficiently processes complex documents, converting scanned images into editable text without throwing restrictive dimension errors. It serves as an excellent, lightweight alternative for handling engineering documents.
- 1. Open your scanned PDF: Launch WPS Office and open your scanned engineering drawing in the WPS PDF editor.
- 2. Access the OCR feature: Navigate to the 'Tools' tab on the top ribbon and click on the 'OCR' button.
- 3. Choose your extraction method: Select whether you want to simply extract the text to a document or convert the entire file into a searchable, editable PDF.
- 4. Set the document language: Select the primary language of the text within your drawing to ensure the highest possible recognition accuracy.
- 5. Start OCR processing: Click 'Start' to let WPS PDF process the document and save your newly editable file.
Frequently Asked Questions
Why does Acrobat say my image is too wide for OCR?
This error generally occurs when the scanner saves the image at a very low resolution, such as 72 DPI. While the total pixel count might be correct, the low DPI causes the software to interpret the physical dimensions (in inches or centimeters) as excessively large, exceeding Adobe Acrobat's maximum page size limits.
Can I simply crop the PDF to fix the OCR error?
Cropping a document inside a PDF editor after it has already been partially processed can remove existing OCR data, making it difficult to process the complete document. If you need to crop, it is highly recommended to do so in a dedicated image editor before converting the file to a PDF.
What is the optimal DPI for running OCR on scanned drawings?
For the best OCR accuracy and manageable physical file dimensions, you should scan or resample your documents at 288 to 300 DPI. This resolution packs enough detail for the engine to recognize text characters accurately without making the physical page size too large.
Will changing the DPI in Photoshop reduce the quality of my scanned drawing?
If you change the DPI in an image editor while making sure the 'Resample' option is turned off, the image quality will not degrade. This method keeps the exact same number of pixels but packs them closer together, which simply reduces the physical print dimensions of the document.
