Ativar o OCR no Greenshot
How can I use Greenshot for OCR?
For the Greenshot OCR (Optical Character Recognition) plug-in to work we are depending on a component from Microsoft called MODI (Microsoft Office Document Imaging). If this is installed Greenshot will activate the plugin (if installed) and you will have an OCR destination. If you select this destination the OCR logic from Microsoft will try to detect the text on the screenshot and Greenshot will place this on the clipboard. MODI can be installed as an option from the Microsoft Office 2003 / 2007 installer or as an option from the free Microsoft SharePoint Designer 2007 ( you can find a description and a link to download it under “method 2″ here: http://support.microsoft.com/kb/982760
Essencialmente, parece que você precisa baixar e instalar algo que contenha os componentes MODI. Uma vez instalado, o software Greenshot deverá ativar o plug-in que fornece a funcionalidade OCR.
Se você não conseguir encontrar isso no software Greenshot assim que os componentes MODI estiverem instalados, tente desinstalar o Greenshot e reinstalá-lo.