noun
document reader
A device or software that reads printed or handwritten documents and converts them into digital data. Used in computing contexts.
この文書読取り装置は、手書きの文字も認識できます。
This document reader can also recognize handwritten characters.
スキャナー is a more common loanword for a scanner device, while 文書読取り装置 is a longer, more technical Japanese term.
Compound of 文書 (document), 読取り (reading), and 装置 (device). A straightforward technical term.