Editing Image scanner (section)

=== Software scanners{{anchor|Smartphone scanner app}} ===
The higher-resolution cameras fitted to some [[smartphone]]s can produce reasonable quality document scans by taking a photograph with the phone's camera and post-processing it with a scanning app, a range of which are available for most phone [[operating system]]s, to whiten the background of a page, correct perspective distortion so that the shape of a rectangular document is corrected, convert to black-and-white, etc. Many such apps can scan multiple-page documents with successive camera exposures and output them either as a single file or multiple-page files. Some smartphone scanning apps can save documents directly to online storage locations, such as [[Dropbox (service)|Dropbox]] and [[Evernote]], send via email, or fax documents via email-to-fax gateways.<ref name=mit />

Smartphone scanner apps can be broadly divided into three categories:
# Document scanning apps primarily designed to handle documents and output PDF, and sometimes JPEG, files
# Photo scanning apps that output JPEG files, and have editing functions useful for photo rather than document editing;
# Barcode-like [[QR code]] scanning apps that then search the internet for information associated with the code.<ref name=mit>{{cite web | url=https://www.technologyreview.com/s/425907/scan-anything-and-let-your-phone-do-the-rest/ | title=Scan Anything and Let Your Phone Do the Rest | work=MIT Technology Review | publisher=Massachusetts Institute of Technology | last=Muller | first=Ian E.}}</ref>