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自动对焦系统中图像非均匀采样的实验研究 被引量:14
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作者 李奇 冯华君 徐之海 《光子学报》 EI CAS CSCD 北大核心 2003年第12期1499-1501,共3页
将非均匀采样运用在自动对焦的窗口选择中 ,并进行了实验研究 这种方式可以保持中央的高分辨率 ,并保持较大的视场范围 ,克服了中央选窗时由于成像主体偏离中央引起的误对焦 同时 ,大大减少计算对焦评价函数所需的数据 ,从而加快对焦... 将非均匀采样运用在自动对焦的窗口选择中 ,并进行了实验研究 这种方式可以保持中央的高分辨率 ,并保持较大的视场范围 ,克服了中央选窗时由于成像主体偏离中央引起的误对焦 同时 ,大大减少计算对焦评价函数所需的数据 ,从而加快对焦速度 。 展开更多
关键词 非均匀采样 类视网膜模型 自动对焦 图像评价
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Diabetic retinopathy: recent advances towards understanding neurodegeneration and vision loss 被引量:19
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作者 BARBER Alistair J. 《Science China(Life Sciences)》 SCIE CAS CSCD 2015年第6期541-549,共9页
Diabetic retinopathy (DR) is one of the most common retinal diseases world-wide. It has a complex pathology that involves the vasculature of the inner retina and breakdown of the blood-retinal barrier. Extensive res... Diabetic retinopathy (DR) is one of the most common retinal diseases world-wide. It has a complex pathology that involves the vasculature of the inner retina and breakdown of the blood-retinal barrier. Extensive research has determined that DR is not only a vascular disease but also has a neurodegenerative component and that essentially all types of ceils in the retina are affected, leading to chronic loss of visual function. A great deal of work using animal models of DR has established the loss of neurons and pathology of other cell types, including supporting glial cells. There has also been an increased emphasis on measuring retinal function in the models, as well as further validation and extension of the animal studies by clinical and translational research. This article will attempt to summarize the more recent developments in research towards understanding the complexities of retinal neurodegeneration and functional vision loss in DR. 展开更多
关键词 RETINA DIABETES NEURODEGENERATION visual function vascular function APOPTOSIS SYNAPSE DENDRITE
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