Search results for "visual quality"

showing 3 items of 3 documents

Comparison of short-term light disturbance, optical and visual performance outcomes between a myopia control contact lens and a single-vision contact…

2020

Purpose To compare the optical and visual performance of a dual-focus (DF) contact lens used for myopia control with a single-vision (SV) contact lens of the same material. Methods A randomised, double-masked crossover study. Twenty-eight healthy, myopic volunteers between 18 and 32 years of age (23.49 +/- 4.07 years) participated in this study. The sensory dominant eye for distance vision was determined. Refraction, best-corrected visual acuity (VA) and aberrations for 3 mm and 5 mm pupil diameters were quantified without a contact lens in situ. Subjects were fitted with two contact lens designs: DF and SV, both made of omafilcon A material. The Quality of Vision (QoV) questionnaire, over-…

AdultMaleTime FactorsAdolescentgenetic structuresVisual qualityControl (management)Visual AcuityVisual performanceLight disturbanceContrast Sensitivity03 medical and health sciencesYoung Adult0302 clinical medicineDouble-Blind MethodMyopiaHumansMiSightCross-Over StudiesScience & TechnologyColor VisionMultifocal contact lensContact Lenses HydrophilicSensory Systemseye diseasesTerm (time)Contact lensOphthalmologyScholarship030221 ophthalmology & optometryOptometryFemalePsychology030217 neurology & neurosurgeryMyopia controlOptometryFollow-Up Studies
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A Curvature Based Method for Blind Mesh Visual Quality Assessment Using a General Regression Neural Network

2016

International audience; No-reference quality assessment is a challenging issue due to the non-existence of any information related to the reference and the unknown distortion type. The main goal is to design a computational method to objectively predict the human perceived quality of a distorted mesh and deal with the practical situation when the reference is not available. In this work, we design a no reference method that relies on the general regression neural network (GRNN). Our network is trained using the mean curvature which is an important perceptual feature representing the visual aspect of a 3D mesh. Relatively to the human subjective scores, the trained network successfully asses…

feature learning[ INFO.INFO-TS ] Computer Science [cs]/Signal and Image ProcessingComputer sciencemedia_common.quotation_subjectFeature extractiondistorted meshGRNNmean curvature02 engineering and technologyMachine learningcomputer.software_genreCurvaturevisual aspect representation[INFO.INFO-TS]Computer Science [cs]/Signal and Image ProcessingDistortioncomputational method0202 electrical engineering electronic engineering information engineeringFeature (machine learning)computational geometrymean opinion scoresQuality (business)Polygon meshmedia_commonArtificial neural networkbusiness.industrycompetitive scores Author Keywords Blind mesh visual quality assessmentperceptual feature020207 software engineeringregression analysis INSPEC: Non-Controlled Indexing curvature based methodblind mesh visual quality assessmentno-reference quality assessmentvisual qualityVisualizationgeneral regression neural network traininggeneral regression neural networkmesh generationneural netssubject scoreshuman perceived quality predictionhuman subjective scores020201 artificial intelligence & image processinglearning (artificial intelligence)Artificial intelligencepredicted objective scoresbusiness3D meshcomputer
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Adaptation of the tropical hybrid Euphorbia×lomi Rauh to the exposure to the Mediterranean temperature extremes

2014

Abstract Poysean ( Euphorbia × lomi Rauh) has been introduced in the Mediterranean countries as an ornamental plant for indoor uses. When used outdoor, few information is available about its ability to withstand the Mediterranean temperature extremes. An experiment in an open stand was performed to evaluate poysean tolerance to the winter and summer temperatures of the thermo Mediterranean climate and its ornamental value for urban greening. Two genotypes of poysean (Nguen Muang, NM; and Soi Budsanin, SB) with similar bracts and flower colours were grown at either 2 or 3 plants per pot during 23 months. Number of flower racemes and leaves per plant and plant height were recorded monthly. Ov…

Mediterranean climateBractEuphorbiaEcologyVisual qualityPlant densitySoil ScienceForestrySettore AGR/04 - Orticoltura E FloricolturaBiologybiology.organism_classificationSettore AGR/02 - Agronomia E Coltivazioni ErbaceeGiant crown of thorns; Ornamental value; Plant adaptation; Poysean; Visual qualityHorticultureOrnamental valuePlant adaptationRacemeHomogeneousAbundance (ecology)BotanyOrnamental plantGiant crown of thornGiant crown of thornsPoyseanUrban Forestry & Urban Greening
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