| Investigation of the effect of ambient lighting on contrast sensitivity using a novel method for conducting visual research on LCDS. | |
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MedLine Citation:
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PMID: 20211917 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The DICOM part 14 greyscale standard display function provides one way of harmonising image appearance under different monitor luminance settings. This function is based on ideal observer conditions, where the eye is always adapted to the target luminance and thereby also at peak contrast sensitivity. Clinical workstations are, however, often submitted to variations in ambient light due to a sub-optimal reading room light environment. Also, clinical images are inhomogeneous and low-contrast patterns must be detected even at luminance levels that differ from the eye adaptation level. All deviations from ideal luminance conditions cause the observer to detect patterns with reduced eye sensitivity but the magnitude of this reduction is unclear. A method is presented to display well-defined sinusoidal low-contrast test patterns on an liquid crystal display. The observers were exposed to light from three different areas: (i) the test pattern covering approximately 2 degrees x 2 degrees; (ii) the remaining of the display surface and (iii) ambient light from outside the display area covering most of the observers' field of view. By adjusting the luminance from each of these three areas, the observers' ability to detect low-contrast patterns under sub-optimal viewing conditions was studied. Ambient light from outside the display area has a moderate effect on the contrast threshold, except for the combination of high ambient light and dark objects, where the contrast threshold increased considerably. |
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Authors:
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Patrik Sund; Magnus Båth; Lars Gunnar Månsson |
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Publication Detail:
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Type: Journal Article Date: 2010-03-08 |
Journal Detail:
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Title: Radiation protection dosimetry Volume: 139 ISSN: 1742-3406 ISO Abbreviation: Radiat Prot Dosimetry Publication Date: 2010 Apr-May |
Date Detail:
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Created Date: 2010-05-11 Completed Date: 2010-08-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8109958 Medline TA: Radiat Prot Dosimetry Country: England |
Other Details:
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Languages: eng Pagination: 62-70 Citation Subset: IM |
Affiliation:
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Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden. patrik.sund@vgregion.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Computer Terminals* Data Display* Equipment Design Equipment Failure Analysis / methods Image Enhancement / instrumentation* Image Interpretation, Computer-Assisted / instrumentation*, methods* Lighting / instrumentation* Semiconductors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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