Digital imaging

Digital imaging or digital image acquisition is the creation of digital images, typically from a physical scene. The term is often assumed to imply or include the processing, compression, storage, printing, and display of such images. The most usual method is by digital photography with a digital camera but other methods are also employed.

Digital imaging was developed in the 1960s and 1970s, largely to avoid the operational weaknesses of film cameras, for scientific and military missions including the KH-11 program. As digital technology became cheaper in later decades it replaced the old film methods for many purposes.

Contents

Methods

A digital photograph may be created directly from a physical scene by a camera or similar device. Alternatively, a digital image may be obtained from another image in an analog medium, such as photographs, photographic film, or printed paper, by an image scanner or similar device. Many technical images—such as those acquired with tomographic equipment, side-scan sonar, or radio telescopes—are actually obtained by complex processing of non-image data. Weather radar maps as seen on television news are a commonplace example. The digitalization of analog real-world data is known as digitizing, and involves sampling (discretization) and quantization.

Finally, a digital image can also be computed from a geometric model or mathematical formula. In this case the name image synthesis is more appropriate, and it is more often known as rendering.

Digital image authentication is an issue [1] for the providers and producers of digital images such as health care organizations, law enforcement agencies and insurance companies. There are methods emerging in forensic photography to analyze a digital image and determine if it has been altered.

See also

References

External links


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Digital Imaging — [ˈdɪdʒɪtl̩ ˈɪmɪdʒɪŋ] (dt. ‚digitale Bildaufzeichnung‘) ist ein englischer Ober oder Sammelbegriff für alle Prozesse der elektronischen Bildverarbeitung (EBV). Ähnlich wie der Begriff Multimedia in den 1990er Jahren ist Digital Imaging ein durch… …   Deutsch Wikipedia

  • Digital Imaging and Communications in Medicine — (DICOM) is a standard for handling, storing, printing, and transmitting information in medical imaging. It includes a file format definition and a network communications protocol. The communication protocol is an application protocol that uses… …   Wikipedia

  • Digital Imaging and Communications in Medecine — Digital imaging and commmunications in medicine Une image de médecine nucléaire au format Dicom DICOM (Digital Imaging and COmmunications in Medicine, « imagerie et communication numériques en médecine) est un standard de communication et… …   Wikipédia en Français

  • Digital imaging and commmunications in medicine — Une image de médecine nucléaire au format Dicom DICOM (Digital Imaging and COmmunications in Medicine, « imagerie et communication numériques en médecine) est un standard de communication et d’archivage en imagerie médicale. C est aussi par… …   Wikipédia en Français

  • Digital imaging and communications in medicine — Digital imaging and communications in medicine, couramment abrégée DICOM, est une norme standard pour la gestion informatique des données issues de l imagerie médicale. Sommaire 1 Objectifs et avantages 2 Organisation du standard 3 Format …   Wikipédia en Français

  • Digital Imaging and Communications in Medicine — (DICOM) ist ein offener Standard zur Speicherung und zum Austausch von Informationen im medizinischen Bilddatenmanagement. Diese Informationen können beispielsweise digitale Bilder, Zusatzinformationen wie Segmentierungen, Oberflächendefinitionen …   Deutsch Wikipedia

  • Digital imaging technician — A digital imaging technician (DIT) works in collaboration with a cinematographer on work flow, systemization, signal integrity and image manipulation, to achieve the highest image quality and creative goals of cinematography in the digital… …   Wikipedia

  • Digital Imaging Technician (DIT) — PP A person that works with a digital cinematographer on technical aspects such as workflow and image manipulation to achieve the desired result …   Audio and video glossary

  • Mamiya Digital Imaging — Rechtsform Kabushiki gaisha (Aktiengesellschaft) Gründung 1940 Sitz Tokio, Japan …   Deutsch Wikipedia

  • Satellite Digital Imaging System — The Satellite Digital Imaging System (SDIS) is a simple system composed of Commercial Off the Shelf (COTS) hardware and custom integration software, which allows the operator to transmit digital photos from an aircraft in flight to a ground… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.