document-understanding
latest
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- Overview
- Getting started
- Activities
- Insights dashboards
- Document Understanding Process
- Quickstart tutorials
- Framework components
- Model Details
- Overview
- Document Understanding - ML package
- DocumentClassifier - ML package
- ML packages with OCR capabilities
- 1040 - ML package
- 1040 Schedule C - ML package
- 1040 Schedule D - ML package
- 1040 Schedule E - ML package
- 1040x - ML package
- 3949a - ML package
- 4506T - ML package
- 709 - ML package
- 941x - ML package
- 9465 - ML package
- ACORD125 - ML package
- ACORD126 - ML package
- ACORD131 - ML package
- ACORD140 - ML package
- ACORD25 - ML package
- Bank Statements - ML package
- Bills Of Lading - ML package
- Certificate of Incorporation - ML package
- Certificate of Origin - ML package
- Checks - ML package
- Children Product Certificate - ML package
- CMS 1500 - ML package
- EU Declaration of Conformity - ML package
- Financial Statements - ML package
- FM1003 - ML package
- I9 - ML package
- ID Cards - ML package
- Invoices - ML package
- Invoices Australia - ML package
- Invoices China - ML package
- Invoices Hebrew - ML package
- Invoices India - ML package
- Invoices Japan - ML package
- Invoices Shipping - ML package
- Packing Lists - ML package
- Payslips - ML package
- Passports - ML package
- Purchase Orders - ML package
- Receipts - ML package
- Remittance Advices - ML package
- UB04 - ML package
- Utility Bills - ML package
- Vehicle Titles - ML package
- W2 - ML package
- W9 - ML package
- Other Out-of-the-box ML Packages
- Public endpoints
- Traffic limitations
- OCR Configuration
- Pipelines
- OCR services
- Supported languages
- Deep Learning
- Data and security
- Licensing and Charging Logic
Document Understanding classic user guide
Last updated Apr 23, 2026
OCR engines
An OCR Engine is used in the Digitization component, to identify text in a file, when native content is not available.
Note:
The images that need to be processed should have a resolution range of:
- min: 50 x 50 pixels
- max: 9000 x 9000 pixels
Here is a selection of OCR Engines that you can choose from, according to your needs, throughout the Document UnderstandingTM Framework.
| OCR Engine | Activity Pack | Debug Logs Format in Logs Folder | Reports Confidence |
|---|---|---|---|
| UiPath Extended Languages OCR | UiPath.OCR.Activities | ${date:format=yyyy-MM-dd} | ✅ |
| UiPath Document OCR | UiPath.OCR.Activities | ${date:format=yyyy-MM-dd} | ✅ |
| OCR for Chinese, Japanese and Korean | UiPath.Core.Activities.CjkOCR | ${date:format=yyyy-MM-dd} | ✅ |
| OmniPage OCR | UiPath.OmniPage.Activities | ${date:format=yyyy-MM-dd} | ✅ |
| Google Cloud Vision OCR | UiPath.UIAutomation.Activities | ${date:format=yyyy-MM-dd} | ❌ if DetectionMode is set to TextDetection (default) ✅ if DetectionMode is set to DocumentTextDetection |
| Microsoft Azure Computer Vision OCR | UiPath.UIAutomation.Activities | ${date:format=yyyy-MM-dd} | ❌ if UseReadAPI is not selected (default) ✅ if UseReadAPI is selected |
| Microsoft OCR | UiPath.UIAutomation.Activities | ${date:format=yyyy-MM-dd} | ❌ |
| Tesseract OCR | UiPath.UIAutomation.Activities | ${date:format=yyyy-MM-dd} | ✅ |
Note:
When debugging errors, you can always visit the logs folder and check the relevant OCR log files. Read more about logging here.