# OCR engines

> An OCR Engine is used in the Digitization component, to identify text in a file, when native content is not available.

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<sup>TM</sup> Framework.

| **OCR Engine** | **Activity Pack** | **Debug Logs Format in Logs Folder** | **Reports Confidence** |
| --- | --- | --- | --- |
| [UiPath Extended Languages OCR](https://docs.uipath.com/activities/other/latest/document-understanding/uipath-extended-languages-ocr) | `UiPath.OCR.Activities` | `${date:format=yyyy-MM-dd}` | ✅ |
| [UiPath Document OCR](https://docs.uipath.com/activities/other/latest/document-understanding/ui-path-document-ocr) | `UiPath.OCR.Activities` | `${date:format=yyyy-MM-dd}` | ✅ |
| [OCR for Chinese, Japanese and Korean](https://docs.uipath.com/activities/other/latest/document-understanding/cjk-ocr) | `UiPath.Core.Activities.CjkOCR` | `${date:format=yyyy-MM-dd}` | ✅ |
| [OmniPage OCR](https://docs.uipath.com/activities/other/latest/document-understanding/omnipage-ocr) | `UiPath.OmniPage.Activities` | `${date:format=yyyy-MM-dd}` | ✅ |
| [Google Cloud Vision OCR](https://docs.uipath.com/activities/other/latest/ui-automation/google-cloud-ocr) | `UiPath.UIAutomation.Activities` | `${date:format=yyyy-MM-dd}` | ❌ if **DetectionMode** is set to **TextDetection** (default)  ✅ if **DetectionMode** is set to **DocumentTextDetection** |
| [Microsoft Azure Computer Vision OCR](https://docs.uipath.com/activities/other/latest/ui-automation/microsoft-azure-computer-vision-ocr) | `UiPath.UIAutomation.Activities` | `${date:format=yyyy-MM-dd}` | ❌ if **UseReadAPI** is not selected (default)  ✅ if **UseReadAPI** is selected |
| [Microsoft OCR](https://docs.uipath.com/activities/other/latest/ui-automation/microsoft-ocr) | `UiPath.UIAutomation.Activities` | `${date:format=yyyy-MM-dd}` | ❌ |
| [Tesseract OCR](https://docs.uipath.com/activities/other/latest/ui-automation/google-ocr) | `UiPath.UIAutomation.Activities` | `${date:format=yyyy-MM-dd}` | ✅ |

:::note
When debugging errors, you can always visit the [logs folder](https://docs.uipath.com/studio/docs/debugging-actions) and check the relevant OCR log files. Read more about logging [here](https://docs.uipath.com/studio/docs/studio-logs).
:::