Digitizing And Interfacing Of Nondigital Images

Norman A. Baily

doi:10.1117/12.967657

14 January 1982 Digitizing And Interfacing Of Nondigital Images

Norman A. Baily

Author Affiliations +

Proceedings Volume 0318, 1st Intl Conf and Workshop on Picture Archiving and Communication Systems; (1982) https://doi.org/10.1117/12.967657
Event: 1st International Conference and Workshop on Picture Archiving and Communication Systems, 1981, Newport Beach, United States

Abstract

In discussing analog or non-digital images it is important to recognize that all images are generated by an interaction between quanta (either light, x or gamma rays, etc.) or particulate radiations, and a substance capable of responding to the interaction of these rays and that substance in such a way that an image can be generated. The intensity of the primary radiation and its spatial variation will then reflect the object being imaged. Therefore, the real difference between a digitized and an analog image lies in the method of recording this data. Many of the systems classified as digital make use of first-stage analog devices from which information is extracted and then transformed to a digitized format. In this paper we will discuss images which have not undergone such a transformation and which have been stored in analog form by an analog storage device. Such storage devices are usually photographic film, video disk, or video tape. It is from these analog storage media that subsequent digitization and/or processing by computer takes place. The choice of the methods of recording and digitization can greatly influence the signal to noise level and therefore the precision and accuracy of the computed results whether expressed as an image or in terms of numbers. Commonly used are video cameras, laser scanners, and photo-electronic scanners. The signal to noise level capabilities of these digitization modalities also influence both spatial and gray level resolutions achievable. In the case of radiological imaging most applications utilizing digitization have involved the use of video. The use of video for such applications has been reviewed recently.' In this paper we shall restrict our discussion to this modality.

Citation Download Citation

Norman A. Baily "Digitizing And Interfacing Of Nondigital Images", Proc. SPIE 0318, 1st Intl Conf and Workshop on Picture Archiving and Communication Systems, (14 January 1982); https://doi.org/10.1117/12.967657

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Video

Analog electronics

Spatial resolution

Calibration

Diagnostics

Telecommunications

Image resolution

Show All Keywords

Keywords/Phrases

Search In:

Publication Years