Translation and analysis of words by ChatGPT artificial intelligence
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What (who) is scanned image - definition
![Copyright Law]] to scan a book by a third party who is not a copyright holder or a book owner. Therefore, in South Korea, book owners visit 'Scan Room' to scan books by themselves.](https://commons.wikimedia.org/wiki/Special:FilePath/2020-03-27 16.38.23 Scan Room in South Korea.jpg?width=200 "Copyright Law]] to scan a book by a third party who is not a copyright holder or a book owner. Therefore, in South Korea, book owners visit 'Scan Room' to scan books by themselves.")
![Belinograph]] BEP2V wirephoto machine by Edouard Bélin, 1930](https://commons.wikimedia.org/wiki/Special:FilePath/Belinograph BEP-2V - MfK Bern.jpg?width=200 "Belinograph]] BEP2V wirephoto machine by Edouard Bélin, 1930")
![Detroit News]]'' in the early 1990s.](https://commons.wikimedia.org/wiki/Special:FilePath/Photoshop goddess version 1.05 (3378276180).jpg?width=200 "Detroit News]]'' in the early 1990s.")
![sceyeX document camera.](https://commons.wikimedia.org/wiki/Special:FilePath/SilverCreations - model "sceyeX" 10MP Document Scanner 03-2013.jpg?width=200 "sceyeX document camera.")
Wikipedia
An image scanner—often abbreviated to just scanner—is a device that optically scans images, printed text, handwriting or an object and converts it to a digital image. Commonly used in offices are variations of the desktop flatbed scanner where the document is placed on a glass window for scanning. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications. Mechanically driven scanners that move the document are typically used for large-format documents, where a flatbed design would be impractical.
Modern scanners typically use a charge-coupled device (CCD) or a contact image sensor (CIS) as the image sensor, whereas drum scanners, developed earlier and still used for the highest possible image quality, use a photomultiplier tube (PMT) as the image sensor. A rotary scanner, used for high-speed document scanning, is a type of drum scanner that uses a CCD array instead of a photomultiplier. Non-contact planetary scanners essentially photograph delicate books and documents. All these scanners produce two-dimensional images of subjects that are usually flat, but sometimes solid; 3D scanners produce information on the three-dimensional structure of solid objects.
Digital cameras can be used for the same purposes as dedicated scanners. When compared to a true scanner, a camera image is subject to a degree of distortion, reflections, shadows, low contrast, and blur due to camera shake (reduced in cameras with image stabilization). Resolution is sufficient for less demanding applications. Digital cameras offer advantages of speed, portability and non-contact digitizing of thick documents without damaging the book spine. In 2010 scanning technologies were combining 3D scanners with digital cameras to create full-color, photo-realistic 3D models of objects.
Scans are usually downloaded by a computer the unit is attached to. Some scanners are able to store scans on standalone flash media (e.g. memory cards and USB sticks).
In the biomedical research area, detection devices for DNA microarrays are called scanners as well. These scanners are high-resolution systems (up to 1 µm/ pixel), similar to microscopes. The detection is done via CCD or a photomultiplier tubes.
