Editing Image scanner (section)

=== Handheld{{anchor|Hand}} ===
[[File:Logitech ScanMan Color-P4191193-white.jpg|thumb|A handheld scanner ([[Logitech]] ScanMan Color)]]
A handheld scanner is a type of scanner that must be manually dragged or gilded by hand across the surface of the object to be scanned. Scanning documents in this manner requires a steady hand, as an uneven scanning rate produces distorted images.<ref>{{cite web | date=n.d. | url=https://www.pcmag.com/encyclopedia/term/handheld-scanner | title=Definition of handheld scanner | work=PC Magazine | publisher=Ziff-Davis | archiveurl=https://web.archive.org/web/20240303064613/https://www.pcmag.com/encyclopedia/term/handheld-scanner | archivedate=March 3, 2024}}</ref> Some handheld scanners have an indicator light on the scanner for this purpose, actuating if the user is moving the scanner too fast.<ref>{{cite book | last=Baeseler | first=Frank | author2=Bruce Bovill | date=1993 | url=https://books.google.com/books?id=8qHbAAAAMAAJ | title=Scanning and Image Processing for the PC | publisher=McGraw-Hill | page=47 | isbn=9780077078195 | via=Google Books}}</ref> They typically have at least one button that starts the scan when pressed; it is held by the user for the duration of the scan. Some other handheld scanners have switches to set the [[optical resolution]], as well as a roller, which generates a clock pulse for synchronization with the computer.<ref name=gruman>{{cite journal | last=Gruman | first=Galen | date=April 29, 1991 | url=https://books.google.com/books?id=y1AEAAAAMBAJ&pg=PT53 | title=Scanning on a Budget | journal=InfoWorld | publisher=IDG Publications | volume=13 | issue=17 | pages=51–62 | via=Google Books}}</ref><ref>{{cite book | last=Busch | first=David D. | author-link=David D. Busch | date=1991 | url=https://books.google.com/books?id=SyYzAAAAMAAJ | title=The Complete Scanner Toolkit for the IBM PC | publisher=Business One Irwin | page=97 | isbn=9781556234798 | via=Google Books}}</ref> Older hand scanners were [[monochrome]], and produced light from an array of green [[Light-emitting diode|LED]]s to illuminate the image; later ones scan in monochrome or color, as desired.<ref>{{cite journal | last=Pastrick | first=Greg | date=November 24, 1992 | url=https://books.google.com/books?id=RJBJPJvct40C&pg=PA40 | title=Logitech's New Hand Scanner Does 24-Bit Color | journal=PC Magazine | publisher=Ziff-Davis | volume=11 | issue=20 | page=40 | via=Google Books}}</ref> A hand scanner may also have a small window through which the document being scanned could be viewed. As hand scanners are much narrower than most normal document or book sizes, software (or the end user) needed to combine several narrow "strips" of scanned documents to produce the finished article.<ref name=gruman /><ref>{{cite journal | last=Falkner | first=Mike | date=November 29, 1988 | url=https://books.google.com/books?id=TJuFGeKsMJ0C&pg=PA295 | title=Hand Scanners Inch Forward | journal=PC Magazine | publisher=Ziff-Davis | volume=7 | issue=20 | pages=277–308 | via=Google Books}}</ref>

Inexpensive, [[#Portable|portable]], battery-powered or USB-powered wand scanners and pen scanners, typically capable of scanning an area as wide as a normal letter and much longer, remain available {{As of|2024|lc=on}}.<ref name=best /><ref>{{Cite web | url=https://me.pcmag.com/en/accessories/2781/irispen-executive-7 | title=IRISPen Executive 7 | date=July 26, 2015 | work=PCMag Middle East | publisher=Ziff-Davis | last=Fernando | first=Chris | archiveurl=https://web.archive.org/web/20221003124123/https://me.pcmag.com/en/accessories/2781/irispen-executive-7 | archivedate=October 3, 2022}}</ref><ref>{{Cite web | last=Calderone | first=Nicholas | url=https://macsources.com/irispen-air-7-smart-wireless-pen-scanner-review/ | title=IRISPen Air 7 Smart Wireless Pen Scanner Review | date=April 25, 2018 | work=MacSources | archiveurl=https://web.archive.org/web/20190525214346/https://macsources.com/irispen-air-7-smart-wireless-pen-scanner-review/ | archivedate=May 25, 2019}}</ref> Some [[Computer mouse|computer mice]] can also scan documents.<ref>{{cite web | url=https://www.pcmag.com/reviews/iriscan-mouse-executive-2 | title=IRIScan Mouse Executive 2 Review | work=PCMag | publisher=Ziff-Davis | last=Harrel | first=William | date=February 7, 2020 | archiveurl=https://web.archive.org/web/20200215191555/https://www.pcmag.com/reviews/iriscan-mouse-executive-2 | archivedate=February 15, 2020}}</ref>