Cumulus, cirrus, stratus
نویسندگان
چکیده
منابع مشابه
Quality of the threshold algorithm in age-related macular degeneration: Stratus versus Cirrus OCT.
PURPOSE Automatically generated measurements of the retinal volume or the central retinal thickness are based on correctly set threshold lines on the retinal surface and the retinal pigment epithelium. The purpose of this study was to compare the accuracy of threshold algorithm lines of Stratus optical coherence tomography (OCT) with those of Cirrus OCT. METHODS A consecutive series of patien...
متن کاملCirrus high-definition optical coherence tomography compared with Stratus optical coherence tomography in glaucoma diagnosis.
PURPOSE To compare the retinal nerve fiber layer (RNFL) evaluation using Cirrus optical coherence tomography (OCT) and Stratus OCT in glaucoma diagnosis. METHODS One hundred thirty normal and 86 patients with glaucoma were included in this prospective study. The signal strengths of the OCTs were evaluated. The sensitivities and specificities of global RNFL average thickness were compared in t...
متن کاملComparison of glaucoma diagnostic Capabilities of Cirrus HD and Stratus optical coherence tomography.
OBJECTIVE To compare the glaucoma diagnostic capabilities offered by Stratus and Cirrus spectral-domain optical coherence tomography (OCT). METHODS One hundred subjects with glaucoma and 74 healthy subjects were tested by Stratus and Cirrus OCT. Areas under the receiver operating characteristic curves (AUCs) of average, 4-quadrant, and 12-sector retinal nerve fiber layer thicknesses and sensi...
متن کاملDiurnal Cycles of Cumulus, Cumulonimbus, Stratus, Stratocumulus, and Fog from Surface Observations over Land and Ocean
A worldwide climatology of the diurnal cycles of low clouds is obtained from surface observations made eight or four times daily at 3or 6-h intervals from weather stations and ships. Harmonic fits to the daily cycle are made for 5388 weather stations with long periods of record, and for gridded data on a 58 3 58 or 108 3 108 latitude–longitude grid over land and ocean areas separately. For all ...
متن کاملGround-based Vision Cloud Image Classification based on Extreme Learning Machine
Cloud radiation properties and distribution significantly affect the forecasting accuracy, climate monitoring effectiveness and global climate’s change. A simple method was proposed to automatically recognize four different sky conditions (cirrus, cumulus, stratus and clear sky) by means of extracting some features from visual images that can be used for training classifier. In this paper, text...
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ژورنال
عنوان ژورنال: Géographie et cultures
سال: 2013
ISSN: 1165-0354,2267-6759
DOI: 10.4000/gc.2713