Need for liquid-crystal display monitors having the capability of rendering higher than 8 bits in display-bit depth

Takeshi Hiwasa, Junji Morishita, Shiro Hatanaka, Masafumi Ohki, Fukai Toyofuku, Yoshiharu Higashida

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Our purpose in this study was to examine the potential usefulness of liquid-crystal display (LCD) monitors having the capability of rendering higher than 8 bits in display-bit depth. An LCD monitor having the capability of rendering 8, 10, and 12 bits was used. It was calibrated to the grayscale standard display function with a maximum luminance of 450 cd/m2 and a minimum of 0.75 cd/m2. For examining the grayscale resolution reported by ten observers, various simple test patterns having two different combinations of luminance in 8, 10, and 12 bits were randomly displayed on the LCD monitor. These patterns were placed on different uniform background luminance levels, such as 0, 50, and 100%, for maximum luminance. All observers participating in this study distinguished a smaller difference in luminance than one gray level in 8 bits irrespective of background luminance levels. As a result of the adaptation processes of the human visual system, observers distinguished a smaller difference in luminance as the luminance level of the test pattern was closer to the background. The smallest difference in luminance that observers distinguished was four gray levels in 12 bits, i.e., one gray level in 10 bits. Considering the results obtained by use of simple test patterns, medical images should ideally be displayed on LCD monitors having 10 bits or greater so that low-contrast objects with small differences in luminance can be detected and for providing a smooth gradation of grayscale.

Original languageEnglish
Pages (from-to)104-111
Number of pages8
JournalRadiological physics and technology
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2009

Fingerprint

Liquid Crystals
luminance
monitors
liquid crystals

All Science Journal Classification (ASJC) codes

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging

Cite this

Need for liquid-crystal display monitors having the capability of rendering higher than 8 bits in display-bit depth. / Hiwasa, Takeshi; Morishita, Junji; Hatanaka, Shiro; Ohki, Masafumi; Toyofuku, Fukai; Higashida, Yoshiharu.

In: Radiological physics and technology, Vol. 2, No. 1, 01.01.2009, p. 104-111.

Research output: Contribution to journalArticle

Hiwasa, Takeshi ; Morishita, Junji ; Hatanaka, Shiro ; Ohki, Masafumi ; Toyofuku, Fukai ; Higashida, Yoshiharu. / Need for liquid-crystal display monitors having the capability of rendering higher than 8 bits in display-bit depth. In: Radiological physics and technology. 2009 ; Vol. 2, No. 1. pp. 104-111.
@article{2707389c4f62463cb23deca049670741,
title = "Need for liquid-crystal display monitors having the capability of rendering higher than 8 bits in display-bit depth",
abstract = "Our purpose in this study was to examine the potential usefulness of liquid-crystal display (LCD) monitors having the capability of rendering higher than 8 bits in display-bit depth. An LCD monitor having the capability of rendering 8, 10, and 12 bits was used. It was calibrated to the grayscale standard display function with a maximum luminance of 450 cd/m2 and a minimum of 0.75 cd/m2. For examining the grayscale resolution reported by ten observers, various simple test patterns having two different combinations of luminance in 8, 10, and 12 bits were randomly displayed on the LCD monitor. These patterns were placed on different uniform background luminance levels, such as 0, 50, and 100{\%}, for maximum luminance. All observers participating in this study distinguished a smaller difference in luminance than one gray level in 8 bits irrespective of background luminance levels. As a result of the adaptation processes of the human visual system, observers distinguished a smaller difference in luminance as the luminance level of the test pattern was closer to the background. The smallest difference in luminance that observers distinguished was four gray levels in 12 bits, i.e., one gray level in 10 bits. Considering the results obtained by use of simple test patterns, medical images should ideally be displayed on LCD monitors having 10 bits or greater so that low-contrast objects with small differences in luminance can be detected and for providing a smooth gradation of grayscale.",
author = "Takeshi Hiwasa and Junji Morishita and Shiro Hatanaka and Masafumi Ohki and Fukai Toyofuku and Yoshiharu Higashida",
year = "2009",
month = "1",
day = "1",
doi = "10.1007/s12194-008-0051-0",
language = "English",
volume = "2",
pages = "104--111",
journal = "Radiological Physics and Technology",
issn = "1865-0333",
publisher = "Springer Japan",
number = "1",

}

TY - JOUR

T1 - Need for liquid-crystal display monitors having the capability of rendering higher than 8 bits in display-bit depth

AU - Hiwasa, Takeshi

AU - Morishita, Junji

AU - Hatanaka, Shiro

AU - Ohki, Masafumi

AU - Toyofuku, Fukai

AU - Higashida, Yoshiharu

PY - 2009/1/1

Y1 - 2009/1/1

N2 - Our purpose in this study was to examine the potential usefulness of liquid-crystal display (LCD) monitors having the capability of rendering higher than 8 bits in display-bit depth. An LCD monitor having the capability of rendering 8, 10, and 12 bits was used. It was calibrated to the grayscale standard display function with a maximum luminance of 450 cd/m2 and a minimum of 0.75 cd/m2. For examining the grayscale resolution reported by ten observers, various simple test patterns having two different combinations of luminance in 8, 10, and 12 bits were randomly displayed on the LCD monitor. These patterns were placed on different uniform background luminance levels, such as 0, 50, and 100%, for maximum luminance. All observers participating in this study distinguished a smaller difference in luminance than one gray level in 8 bits irrespective of background luminance levels. As a result of the adaptation processes of the human visual system, observers distinguished a smaller difference in luminance as the luminance level of the test pattern was closer to the background. The smallest difference in luminance that observers distinguished was four gray levels in 12 bits, i.e., one gray level in 10 bits. Considering the results obtained by use of simple test patterns, medical images should ideally be displayed on LCD monitors having 10 bits or greater so that low-contrast objects with small differences in luminance can be detected and for providing a smooth gradation of grayscale.

AB - Our purpose in this study was to examine the potential usefulness of liquid-crystal display (LCD) monitors having the capability of rendering higher than 8 bits in display-bit depth. An LCD monitor having the capability of rendering 8, 10, and 12 bits was used. It was calibrated to the grayscale standard display function with a maximum luminance of 450 cd/m2 and a minimum of 0.75 cd/m2. For examining the grayscale resolution reported by ten observers, various simple test patterns having two different combinations of luminance in 8, 10, and 12 bits were randomly displayed on the LCD monitor. These patterns were placed on different uniform background luminance levels, such as 0, 50, and 100%, for maximum luminance. All observers participating in this study distinguished a smaller difference in luminance than one gray level in 8 bits irrespective of background luminance levels. As a result of the adaptation processes of the human visual system, observers distinguished a smaller difference in luminance as the luminance level of the test pattern was closer to the background. The smallest difference in luminance that observers distinguished was four gray levels in 12 bits, i.e., one gray level in 10 bits. Considering the results obtained by use of simple test patterns, medical images should ideally be displayed on LCD monitors having 10 bits or greater so that low-contrast objects with small differences in luminance can be detected and for providing a smooth gradation of grayscale.

UR - http://www.scopus.com/inward/record.url?scp=64249133254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=64249133254&partnerID=8YFLogxK

U2 - 10.1007/s12194-008-0051-0

DO - 10.1007/s12194-008-0051-0

M3 - Article

C2 - 20821136

AN - SCOPUS:64249133254

VL - 2

SP - 104

EP - 111

JO - Radiological Physics and Technology

JF - Radiological Physics and Technology

SN - 1865-0333

IS - 1

ER -