کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9021125 1561376 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
LCD spatial noise and human observer performance
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
LCD spatial noise and human observer performance
چکیده انگلیسی
Results of physical as well as psychophysical evaluation of an LCD with respect to its spatial noise are presented. Spatial noise is determined using a high-resolution CCD camera and a method is developed to compensate for it. This compensation algorithm is based on a spatial noise map, derived from CCD camera images, and on the application of an error diffusion algorithm. This method of noise compensation reduces the spatial noise by about a factor of 2. Psychophysical evaluation is performed in order to explore the dependence of human contrast sensitivity on display spatial noise. The psychophysical evaluation uses the two-alternative forced choice (2-AFC) method of contrast threshold detection. Aperiodic Gaussian-shaped objects serve as stimuli. They simulate lung nodules. The probability of correct response obtained using the 2-AFC tests indicates that spatial noise compensation leads to a lower contrast threshold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Congress Series - Volume 1281, May 2005, Pages 92-97
نویسندگان
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