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题名:
Effects of ocular aberrations on contrast detection in noise
作者: Liang, Bo1,2,4; Liu, Rong3; Dai, Yun2; Zhou, Jiawei3; Zhou, Yifeng3; Zhang, Yudong1,2
刊名: JOURNAL OF VISION
出版日期: 2012
卷号: 12, 期号:8
关键词: adaptive optics ; contrast detection ; noisy observer model ; ocular aberrations ; psychophysics
文章类型: Article
英文摘要: We use adaptive optics (AO) techniques to manipulate the ocular aberrations and elucidate the effects of these ocular aberrations on contrast detection in a noisy background. The detectability of sine wave gratings at frequencies of 4, 8, and 16 circles per degree (cpd) was measured in a standard two-interval force-choice staircase procedure against backgrounds of various levels of white noise. The observer's ocular aberrations were either corrected with AO or left uncorrected. In low levels of external noise, contrast detection thresholds are always lowered by AO correction, whereas in high levels of external noise, they are generally elevated by AO correction. Higher levels of external noise are required to make this threshold elevation observable when signal spatial frequencies increase from 4 to 16 cpd. The linear-amplifier-model fit shows that mostly sampling efficiency and equivalent noise both decrease with AO correction. Our findings indicate that ocular aberrations could be beneficial for contrast detection in high-level noises. The implications of these findings are discussed.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ophthalmology
研究领域[WOS]: Ophthalmology
关键词[WOS]: VISUAL SIGNAL-DETECTION ; CAT STRIATE CORTEX ; GAIN-CONTROL ; CALCULATION EFFICIENCY ; CLASSIFICATION IMAGES ; PERCEPTUAL TEMPLATES ; OPTICAL ABERRATIONS ; NEURAL COMPENSATION ; MASKING EXPERIMENTS ; SPATIAL SUMMATION
收录类别: SCI
语种: 英语
WOS记录号: WOS:000308034600003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/2398
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, Chengdu, Sichuan, Peoples R China
2.Chinese Acad Sci, Key Lab Adapt Opt, Chengdu, Peoples R China
3.Univ Sci & Technol China, Sch Life Sci, Vis Res Lab, Hefei 230026, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China

Recommended Citation:
Liang, Bo,Liu, Rong,Dai, Yun,et al. Effects of ocular aberrations on contrast detection in noise[J]. JOURNAL OF VISION,2012,12(8).
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