Microsoft Office Document Imaging. Microsoft Office Document Imaging, or sometimes simply known as MDI (standing for Microsoft Document Imaging) is a tool built into the Microsoft Office suite and its various editions that facilitate the translation of paper to data. If you have successfully installed Microsoft Office Document Imaging, you can use this by launching it from Start > All Programs > Microsoft Office.

Microsoft office document imaging is used to scan hard copies of documents and import them into your Microsoft office suite for editing.
The Microsoft Document Imaging software program is freely included in the MS Office CD.
Once you have done so, you can scan the text of a document into Word. Microsoft Office Document Imaging, or sometimes simply known as MDI (standing for Microsoft Document Imaging) is a tool built into the Microsoft Office suite and its various editions that facilitate the translation of paper to data. Such files generated this way have an extension called.mdi.