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Perception of sign language and its application to visual communications for deaf people 总被引:1,自引:0,他引:1
Video communication systems for deaf people are limited in terms of quality and performance. Analysis of visual attention mechanisms for sign language may enable optimization of video coding systems for deaf users. Eye-movement tracking experiments were conducted with profoundly deaf volunteers while watching sign language video clips. Deaf people are found to fixate mostly on the facial region of the signer to pick up small detailed movements associated with facial expression and mouth shapes. Lower resolution, peripheral vision is used to process information from larger, rapid movements of the signer in the video clips. A coding scheme that gives priority to the face of the signer may be applied to improve perception of video quality for sign language communication. 相似文献
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Educational Studies in Mathematics - The multi-faceted nature of mathematics knowledge for teaching, including pedagogical content knowledge (PCK), has been studied widely in elementary classrooms,... 相似文献
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S M Monaghan R J Gilmore R C Muir J E Clarkson T J Crooks T G Egan 《Child abuse & neglect》1986,10(3):369-375
This research revealed in Stage I the ability to identify during the prenatal period women at risk for possible child abuse and in Stage II an intervention program which when introduced resulted in fewer high-risk mothers relinquishing the care of their infants. The research had two main aims: to use the data from Stages I and II to reassess the criteria for identifying "at risk" mothers, and to develop a brief, easily administered screening questionnaire which could be standardized for widespread prenatal use; and to collect data on a random sample of prenatal patients, to use these data for confirming the validity and stability of the screening procedures, and to estimate the incidence of potentially high-risk mothers in an urban population. 相似文献