OCR engines

Available OCR engines for the Digitization component, covering supported image resolution ranges and the selection of engines used when native text content is unavailable.

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 Understanding^TM 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.