ACR/NEMA proposal for a gray-scale display function standard

Hartwig R. Blume

doi:10.1117/12.238462

15 April 1996 ACR/NEMA proposal for a gray-scale display function standard

Hartwig R. Blume

Proceedings Volume 2707, Medical Imaging 1996: Image Display; (1996) https://doi.org/10.1117/12.238462
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

The proposed standard defines a gray-scale display function for monochrome image presentation devices, such as cathode-ray-tube (CRT) monitor/display-controller systems and digital laser image printers. The display function is based on perceptual linearization. It is defined for the luminance range of 0.05 to 4000 cd/m². The standard provides a mathematical formula for the standard display function as well as a table of the luminance levels of the just-noticeable differences (JNDs) of a standard target. The standard facilitates similarity in gray-scale between different image display devices independent of their luminance. The standard does not eliminate the use of application-specific display functions, but rather assures their effectiveness through the standard display function. To realize conformance of an image presentation device with the display function standard, standard test patterns are defined. The patterns are used to measure the luminance of the display or optical density of a print as a function of digital input. By proper interpolation of the inverted measured characteristic function of the display system and inserting the desired standard luminance values for every digital input, a transformation can be computed so that the display system may conform with the display function standard. The standard also defines the dynamic range of an image presentation device as the number of JNDs that theoretically can be realized for a given digitization resolution and the standard target. Interpolation processes and potential conformance measures for the standard are discussed. The proposed display function standard is essential for the proper realization of image presentation services according to the DICOM Standard. The relation of the standard display function to DICOM-defined look-up tables is outlined.

Citation Download Citation

Hartwig R. Blume "ACR/NEMA proposal for a gray-scale display function standard", Proc. SPIE 2707, Medical Imaging 1996: Image Display, (15 April 1996); https://doi.org/10.1117/12.238462

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