# image scanner

> device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image

**Wikidata**: [Q82744](https://www.wikidata.org/wiki/Q82744)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Image_scanner)  
**Source**: https://4ort.xyz/entity/image-scanner

## Summary
An image scanner is a device that optically scans images, printed text, handwriting, or objects and converts them into digital images. It serves as an input device for information processing systems. Scanners come in various forms including flatbed, handheld, and specialized types for documents, film, or barcodes.

## Key Facts
- An image scanner is classified as an input device, a peripheral that provides data and signals to information processing systems
- The technology has multiple specialized variants including flatbed scanners, handheld scanners, drum scanners, and barcode readers
- Russell A. Kirsch, an American computer scientist (1929-2020), was instrumental in early scanner development
- Scanners are used for digitizing documents, photographs, and other physical media for computer processing
- The device converts physical content into digital format through optical scanning technology

### Q: What is an image scanner used for?
A: An image scanner is used to optically scan images, printed text, handwriting, or objects and convert them into digital images that can be processed by computers. It serves as an input device for digitizing physical content.

### Q: What are the main types of scanners?
A: Main types include flatbed scanners, handheld scanners, drum scanners, barcode readers, and specialized scanners like film scanners and microscope slide scanners. Each type is designed for specific scanning needs and materials.

### Q: Who invented the image scanner?
A: Russell A. Kirsch, an American computer scientist, was instrumental in early scanner development. He was born in 1929 and passed away in 2020, contributing significantly to the field of computer imaging.

## Why It Matters
Image scanners revolutionized how we digitize and preserve information, bridging the gap between physical and digital worlds. They enable the conversion of paper documents, photographs, and other physical media into electronic formats that can be stored, edited, shared, and archived indefinitely. This technology has been fundamental to office automation, document management, digital archiving, and modern workflows across industries. Scanners have made it possible to create searchable digital libraries, facilitate remote work through document sharing, and preserve historical documents and photographs in digital formats. The ability to quickly convert physical content into digital form has transformed fields like publishing, education, research, and government administration, making information more accessible and manageable than ever before.

## Notable For
- Converting physical documents and images into digital formats for computer processing
- Multiple specialized variants including flatbed, handheld, and document-specific scanners
- Being classified as an essential input device in computing systems
- Enabling digital archiving and preservation of physical media
- Supporting various applications from office document management to barcode reading

## Body
### Technology and Function
Image scanners operate by using optical sensors to capture light reflected from physical objects or transmitted through transparent materials like film. The device then converts this optical information into digital data that computers can process and store. Modern scanners use various technologies including CCD (Charge-Coupled Device) and CIS (Contact Image Sensor) to achieve high-resolution digital captures.

### Types and Applications
Different scanner types serve specific purposes: flatbed scanners are common for documents and photos, handheld scanners offer portability for on-the-go scanning, drum scanners provide high-quality professional scanning, and barcode readers are specialized for retail and inventory applications. Film scanners are designed specifically for photographic film, while planetary scanners are used for rare books and delicate documents that cannot be pressed against a glass surface.

### Historical Development
The development of scanning technology has been closely tied to advances in computing and digital imaging. Early scanners were large, expensive devices used primarily in specialized applications. As technology improved, scanners became more affordable and compact, leading to widespread adoption in homes and offices. The integration of scanning capabilities into multifunction devices has further expanded their accessibility and utility.

### Integration and Standards
Scanners typically connect to computers via USB, SCSI, or network connections and are controlled through software interfaces. Standards like TWAIN and SANE provide common protocols for scanner communication, ensuring compatibility across different devices and operating systems. This standardization has been crucial for the widespread adoption and integration of scanning technology into various workflows.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Image scanner",
  "description": "Device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image",
  "url": "https://en.wikipedia.org/wiki/Image_scanner",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q12562506",
    "https://en.wikipedia.org/wiki/Image_scanner"
  ],
  "additionalType": "input device"
}

## References

1. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=3803)
2. Freebase Data Dumps. 2013
3. Nuovo soggettario
4. YSO-Wikidata mapping project
5. National Library of Israel
6. KBpedia
7. GF WordNet
8. Wikibase TDKIV