> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/core/ocr/iris-ocr.md).

# Install and Use the IRIS OCR Engine on Server/Desktop

Enhance your OCR capabilities with Apryse's IRIS OCR Module, powered by the advanced IRIS iDRS engine. Learn how to install and use this module for improved text recognition on Windows and Linux platf

{% hint style="info" %}
**Requirements**

*These packages are required to use these features in production. Trial keys have unlimited access to all features*

<a href="https://apryse.com/capabilities#OpticalCharacterRecognition(OCR)" class="button primary">Package: OCR</a><a href="/core/learn-more/modules.md#ocr-by-iris-module" class="button primary">Module: IRIS OCR</a>
{% endhint %}

In addition to the default OCR module, Apryse offers the [IRIS OCR Module](/core/learn-more/modules.md#ocr-by-iris-module) based on the IRIS iDRS engine. This package is licensed separately from the default OCR module and may provide better results in some cases, especially when considering multiple disconnected text snippets on a page, as might occur in documents such as magazine covers or a CAD documents.

## Installing the IRIS OCR Module

The IRIS OCR module requires no special installation step, beyond downloading the appropriate package, and extracting it overtop of a previously expanded Apryse SDK package.

{% hint style="warning" %}
**Warning**

All files in the `Lib` folder of the archive must be present for the module to work as expected.
{% endhint %}

## Using the IRIS OCR Module

Generally speaking, the IRIS module behaves the same as the default OCR module. In particular, any of the operations using the `OCRModule` class described within the [OCR workflow](/core/ocr/workflow.md) page will work without any modification. The one exception to this is the case where there are multiple OCR modules present and accessible by the SDK. In this case the IRIS module must be selected by setting the `OCREngine` option on the `OCROptions` object: `OCROptions.setEngine("iris")`


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.apryse.com/core/ocr/iris-ocr.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.