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Titolo:
Optimization of a contrast-detail-based method for electronic image display quality evaluation
Autore:
Hangiandreou, NJ; Fetterly, KA; Felmlee, JP;
Indirizzi:
Mayo Clin & Mayo Fdn, Dept Diagnost Radiol, Rochester, MN 55905 USA Mayo Clin & Mayo Fdn Rochester MN USA 55905 diol, Rochester, MN 55905 USA
Titolo Testata:
JOURNAL OF DIGITAL IMAGING
fascicolo: 2, volume: 12, anno: 1999,
pagine: 60 - 67
SICI:
0897-1889(199905)12:2<60:OOACMF>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMS; PERFORMANCE; RADIOGRAPHY; RESOLUTION; FILM;
Keywords:
contrast-detail experiments; electronic image display; image quality evaluation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Hangiandreou, NJ Mayo,Clin & Mayo Fdn, Dept Diagnost Radiol, East 2,200 1st St SW, Rochester Mayo Clin & Mayo Fdn East 2,200 1st St SW Rochester MN USA 55905
Citazione:
N.J. Hangiandreou et al., "Optimization of a contrast-detail-based method for electronic image display quality evaluation", J DIGIT IM, 12(2), 1999, pp. 60-67

Abstract

The authors previously reported a general technique based on contrast-detail methods to provide an overall quantitative evaluation of electronic image display quality. The figure-of-merit reflecting overall display quality is called maximum threshold contrast or MTC. In this work we have optimized the MTC technique through improvements in both the test images and the figure-of-merit computation. The test images were altered to match the average luminance with that observed for clinical computed radiographic images. Thefigure-of-merit calculation was altered to allow for contrast-detail data with slopes not equal to -1. Preliminary experiments also were conducted todemonstrate the response of the MTC measurements to increased noise in thedisplayed image. MTC measurements were obtained from five observers using the improved test images displayed with maximum monitor luminance settings of 30-, 50-, and 70-ft-Lamberts. Similar measurements were obtained from two observers using test images altered by the addition of a low level of image noise. The noise-free MTC and MTC difference measurements exhibited standard deviations of 0.77 and 1.55, respectively. This indicates good measurement precision, comparable or superior to that observed using the earlier MTC technique. No statistically significant image quality differences versusmaximum monitor luminance were seen. The noise-added MTC measurements weregreater than the noise-free values by an average of 4.08 pixel values, andthis difference was statistically significant. This response is qualitatively correct, and is judged to indicate good sensitivity of the MTC measurement to increased noise levels. Copyright (C) 1999 by W.B. Saunders Company.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 03:36:54