Editing Image scanner (section)

=== Overhead{{anchor|Book scanners}}{{anchor|Document camera scanner}}{{anchor|Planetary scanner}} ===
{{See also|Book scanning|Document camera|Planetary scanner}}
[[File:ET Series Book Scanner.png|thumb|An overhead [[book scanner]] (CZUR ET Series) with lasers for calibration]]
An overhead scanner is a type of scanner that places the scanning element in a housing on top of a vertical post, hovering above the document or object to be scanned, which lies stationary on an open-air bed. [[Chinon Industries]] patented a specific type of overhead scanner, which uses a rotating mirror to reflect the contents of the bed onto a linear CCD, in 1987. Although very flexible—allowing users to scan not only two-dimensional prints and documents but any 3D object, of any size—the Chinon design required the user to provide uniform illumination of the object to be scanned and was more cumbersome to set up.<ref>{{cite journal | last=Staff writer | date=December 1, 1987 | url=https://link.gale.com/apps/doc/A6117970/GPS?u=wikipedia | title=Chinon's PC-, Mac-Compatible Overhead Scanner Doesn't Require Special Lighting | journal=PC Week | publisher=Ziff-Davis | volume=4 | issue=48 | page=35 | via=Gale}}</ref><ref>{{cite journal | last=Linzmayer | first=Owen W. | date=September 1990 | url=https://link.gale.com/apps/doc/A8679416/GPS?u=wikipedia | title=Desktop Scanners | journal=MacUser | publisher=IDG Communications | volume=6 | issue=9 | pages=136 | via=Gale}}</ref><ref>{{cite journal | last=Karney | first=James | date=April 14, 1992 | url=https://books.google.com/books?id=AoKUhNoOys4C&pg=PP273 | title=Marching to a Different Drummer: The Chinon DS-3000 Color Scanner | journal=PC Magazine | publisher=Ziff-Davis | volume=11 | issue=7 | page=251 | via=Google Books}}</ref>

A more modern type of overhead scanner is a [[document camera]] (also known as a video scanner), which uses a [[digital camera]] to capture a document all at once. Most document cameras output live video of the document and are usually reserved for displaying documents to a live audience, but they may also be used as replacements for image scanners, capturing a single frame of the output as an image file. Document cameras may even use the same [[#Applications programming interface|API]]s as scanners when connected to computers.<ref>{{cite web | last=Juniper | first=Adam | date=April 11, 2024 | url=https://www.digitalcameraworld.com/buying-guides/best-document-camera | title=Best document camera in 2024: which visualizer is the right one for you? | work=Digital Camera World | publisher=Future Publishing}}</ref> A [[planetary scanner]] is a type of very-high-resolution document camera used for capturing certain fragile documents.<ref>{{cite book | last=Monson | first=Jane D. | date=2017 | url=https://books.google.com/books?id=MXs4DwAAQBAJ | title=Getting Started with Digital Collections: Scaling to Fit Your Organization | isbn=9780838915431 | publisher=American Library Association | via=Google Books}}</ref> A [[Book scanning|book scanner]] is another kind of document camera, pairing a digital camera with a scanning area defined by a mat to assist in scanning books. Some more advanced models of book scanners project a laser onto the page for calibration and software skew correction.<ref>{{cite web | url=https://www.pcmag.com/reviews/czur-shine-ultra-pro | title=CZUR Shine Ultra Pro Review | work=PCMag | publisher=Ziff-Davis | last=Harrel | first=William | date=May 3, 2022 | archiveurl=https://web.archive.org/web/20220504003440/https://www.pcmag.com/reviews/czur-shine-ultra-pro | archivedate=May 4, 2022}}</ref><ref>{{Cite web | url=https://www.zdnet.com/home-and-office/smart-office/fujitsu-scansnap-sv600-review/ | title=Do you dream of digitizing your entire book collection? This book scanner can help | website=ZDNET | publisher=Ziff-Davis | last=Gewirtz | first=David | date=October 3, 2022 | archiveurl=https://web.archive.org/web/20221003171500/https://www.zdnet.com/home-and-office/smart-office/fujitsu-scansnap-sv600-review/ | archivedate=October 3, 2022}}</ref>