OmniPage OCR is part of LF Quick Fields, this is required to run as a desktop application. The web client and desktop client can OCR an image document. In Laserfiche it is called Generate Text.

To generate text using OCR from one or more imaged documents

1. From the Folder Browser, select or open the document(s) whose images will be processed by text recognition (OCR).
2. From the toolbar, click Generate Text , or select Generate Searchable Text from the Tasks drop-down menu.
3. The Generate Searchable Text dialog box will open. Select which pages you want to generate searchable text for and click OK.

https://www.laserfiche.com/support/webhelp/Laserfiche/9.2/en-US/UserGuide/Laserfiche_Client.htm#Extraction_and_Indexing/Creating_Text_from_Images_(OCR).htm