imaging

(redirected from Digital imaging)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

imaging

The representation, by means of TV pictures, photographs, graphs, etc., of an object or area by the sensing and recording of patterns of light or other radiation emitted by, reflected from, or transmitted through the object or area. Two broad classifications are chemical imaging, i.e. photography, and electronic imaging. Both are important in astronomy, a variety of photographic emulsions and electronic devices being available for different frequency bands of the electromagnetic spectrum.

The majority of information gathered by ground-based and orbiting telescopes is in digital form so that it can be manipulated by computer. This information can be derived directly from electronic devices, such as CCDs, photon-counting detectors, or photovoltaic detectors, associated with the telescope. These devices respond to radiation by converting it to an electrical signal. They are more sensitive than photographic emulsions, responding to lower levels of intensity and/or producing an image in a shorter time. Photographic plates do, however, provide an image of a much greater area of the sky than existing electronic devices. Machines, such as COSMOS, have therefore been built to measure data on photographic plates rapidly and automatically and produce results in digital form.

An electronic detector can be moved across the focused image of an astronomical object or area of the sky, or the image can be moved across the detector. The electrical signal from the detector is sampled in such a way that an array of values corresponding to an array of portions of the complete image is obtained. Alternatively the image falls on a large number of closely packed detectors, all producing a signal. In each case the result is a set of numbers corresponding to some property of the individual image portions, e.g. the intensity at a particular wavelength. The individual portions into which the image is divided are called pixels (short for picture elements). The greater the number of pixels per image, the higher the resolution, i.e. the greater the detail seen.

This numerical version of the image will normally reside in a computer system, and can be manipulated in different ways in order to highlight different aspects of the original image; the manipulative techniques are known as image processing. The final form of the display can be a TV monitor, a visual display unit attached to a computer, a plotting device, or photographic film, and information derived from the image can also appear in graphs and tables, and be subjected to statistical and numerical analysis.

imaging

[′im·i·jiŋ]
(physics)
The formation of images of objects.

imaging

(graphics)
The production of graphic images, either from a video camera or from digitally generated data (see visualisation), or the recording of such images on microfilm, videotape or laser disk.

See also scanner.

imaging

(1) Creating a film or electronic image of any picture or paper form. It is accomplished by scanning or photographing an object and turning it into a matrix of dots (bitmap), the meaning of which is unknown to the computer, only to the human viewer. Scanned images of text may be encoded into computer data (ASCII or EBCDIC) with page recognition software (OCR). See micrographics, image processing and document imaging.

(2) The illusion of a live performance in audio playback. Microphone placement during recording, post-recording mixing in the studio and the performance of the speakers when listening all contribute to the quality of the imaging. Geared to the type of venue such as a concert hall or nightclub, surround sound processing in the audio equipment creates or enhances effects that attempt to make imaging more realistic.

Speaker Imaging
From the playback side, imaging quality is derived mostly from the speakers. The stiffness and mass of the speaker cone, along with the materials used to suspend the cone in its frame, are the primary criteria that affect the speaker's capability of reproducing sound accurately, and thus the imaging. See surround sound and audiophile.
References in periodicals archive ?
One author stated that "[a]lthough photographs may be manipulated, the potential for making subtle but significant alterations to digital images gives cause for concern that digital images may be unfit for use as evidence in a court of law" (29) and proposed amending the current evidentiary system specifically to deal with digital imaging.
Our team of experts will allow Howard to easily navigate the complex process of migrating to a digital imaging environment.
For additional information about IDC's Digital Imaging research, please contact Anne-Sophie Dankens at adankens@idc.
Digital imaging has migrated from pre-press to a mainstay of the imaging workflow: from capture, to the digital darkroom, distribution collaboration and publication.
DIMA recognized the EASYSHARE-ONE as one of only 17 products, out of thousands of digital products on display, for its influence on the future of digital imaging.
Drawing on the extensive technology, experience, and resources of its people and partners, ANEXA offers a growing family of high-performance, next-generation digital imaging solutions to meet the clinical challenges of today and tomorrow.
Integrating Digital Imaging Technology and Workflow Management for the Ophthalmic World
Our digital imaging products continue to offer superior quality compared to film and our software platform has created a more user-friendly environment for both diagnosis and storage.
As a global leader in digital imaging, Fujifilm pioneered the development of digital medical systems, and today is the leader in digital minilab systems.
In addition, they are funding the Digital Imaging Fellowship Award, which will be presented to DeeAnn Hartung for her participation and contribution to microscopy instruction.
While we are adding value to our total memory card package, we also are improving the digital imaging experience for a countless number of photographers," said Jim Gustke, vice president, memory card business unit, Lexar.
OTTAWA -- Corel's Digital Imaging Software Is A Perfect Companion Gift To Digital Cameras Or Use The Software Yourself To Create Personalized Yet Affordable Digital Photo Gifts That Are Easy To Make With Your Home Computer

Full browser ?