دانلود مقاله ISI انگلیسی شماره 39765
عنوان فارسی مقاله

تثبیت و برجستگی در طول جستجوی صحنه های طبیعی: مورد ادراکپریشی بصری

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
39765 2003 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Fixation and saliency during search of natural scenes: The case of visual agnosia
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Neuropsychologia, Volume 47, Issues 8–9, July 2009, Pages 1994–2003

کلمات کلیدی
ادراکپریشی - حرکات چشم - ادراک صحنه - جستجو بصری - برجستگی
پیش نمایش مقاله
پیش نمایش مقاله تثبیت و برجستگی در طول جستجوی صحنه های طبیعی: مورد ادراکپریشی بصری

چکیده انگلیسی

Models of eye movement control in natural scenes often distinguish between stimulus-driven processes (which guide the eyes to visually salient regions) and those based on task and object knowledge (which depend on expectations or identification of objects and scene gist). In the present investigation, the eye movements of a patient with visual agnosia were recorded while she searched for objects within photographs of natural scenes and compared to those made by students and age-matched controls. Agnosia is assumed to disrupt the top-down knowledge available in this task, and so may increase the reliance on bottom-up cues. The patient's deficit in object recognition was seen in poor search performance and inefficient scanning. The low-level saliency of target objects had an effect on responses in visual agnosia, and the most salient region in the scene was more likely to be fixated by the patient than by controls. An analysis of model-predicted saliency at fixation locations indicated a closer match between fixations and low-level saliency in agnosia than in controls. These findings are discussed in relation to saliency-map models and the balance between high and low-level factors in eye guidance.

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