spatial frequencies
Interocular transfer of spatial adaptation is weak at low spatial frequencies
... high spatial frequencies, sustained presentation, and criterion-dependent methods for assessing ...spatiotemporal frequencies, using a criterion-free 2AFC ...low spatial frequencies, ...
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Apodized-Aperture Pixel Design X-Ray Detector for Improvement of Detective Quantum Efficiency at High Spatial Frequencies
... The detective quantum efficiency (DQE) is a characteristic of x-ray imaging systems describing how well a system can produce high signal-to-noise ratio images compared to an ideal detector. In medical radiography, ...
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Recovering low spatial frequencies in wavefront sensing based on intensity measurements
... The transport of intensity equation (TIE) offers a convenient method to retrieve the phase of a wave function from maps of the irradiance (images) recorded at different planes along the optic axis of an optical system. ...
9
Effects of chronic alcoholism in the sensitivity to luminance contrast in vertical sinusoidal gratings
... In this context, it is necessary to conduct further research seeking to refine the sample characteristics to establish intra and more homogeneous parameters between groups and thus further elucidate the effect of chronic ...
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The relationship between inspection time and IQ in specific reading disabled grade 7 students
... Further, in controls the presence of the 6 Hz uniform field actually decreased persistence duration at higher spatial frequencies, supporting the hypothesis of tonic transient-on-sustain[r] ...
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THE EFFECT OF PUPIL SIZE AND WAVEFRONT ABERRATION OF THE EYE ON BINOCULAR SUMMATION.
... We investigated the effect of natural pupil and wavefront aberration of the eye on the binocular summation. Nine volunteers took part in this study. Continuous recording of natural pupil diameters under monocular and ...
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Influence of retinopathy on the achromatic and chromatic vision of patients with type 2 diabetes
... s spatial vision. Visual acuity is correlated with high spatial fre- quency cutoff of the luminance spatial contrast sensitiv- ity function, and represents the highest spatial frequency that a ...
10
Functional acuity contrast sensitivity assessment in young and middle age healthy persons at the day time with and without glare
... 8th spatial frequency, and noticed that in patients from 40 to 79 years of age whose visual acuity was ...(low spatial frequency) and high contrast visual acuity (18, ...high spatial ...
6
Scotopic and Photopic Visual Thresholds and Spatial and Temporal Discrimination Evaluated by Behavior of Mice in a Water Maze †
... Video displays precisely control the grating contrast and spatial frequencies; 3 Innate responses, head and body movements, to moving gratings also can be measured precisely 10,15; and 4[r] ...
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Anatomically diverse butterfly scales all produce structural colours by coherent scattering
... visible spatial frequencies (between 300 and 800·nm) to ...the spatial frequency averages for each wavelength were then multiplied by twice the estimated average refractive index of the medium and ...
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Aspects of Fourier imaging
... on spatial frequency to be determined using this sim- ple model of natural ...of spatial frequencies with a slope of ∼ ...high spatial frequencies the spectra fall of rapidly with ...
179
Parameters of motion vision in low light in the hawkmoth Manduca sexta
... levels, spatial frequencies, and temporal ...preferred spatial frequency decreases as the luminance level ...motion, spatial resolution may not be as important as speed of response in the ...
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Are Contrast Sensitivity Functions Impaired in Insulin Dependent Diabetics Without Diabetic Retinopathy?
... five spatial frequencies ...all spatial frequencies in the study group was ...middle spatial frequency of 6 and 12 c/deg, before disturbing visual acuity and before changes in the ...
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A novel approach to evaluate spatial resolution of MRI clinical images for optimization and standardization of breast screening protocols.
... of spatial details ...higher spatial frequencies, produc- ing images with increased sharpness and ...of spatial frequencies for LIN both at frequencies ...limiting spatial ...
10
Revealing the neural time course of direct gaze processing via spatial frequency manipulation of faces
... The role of spatial frequency information for ERP components sensitive to faces and emotional facial expression.. The effects of face spatial frequencies on cortical processing revealed [r] ...
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Principles underlying chromatophore addition during maturation in the European cuttlefish, Sepia officinalis
... different spatial frequencies in the cuttlefish ...higher spatial frequency than existing (control) chromatophores of the same color ...increasing spatial frequencies until they are ...
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What do contrast threshold equivalent noise studies actually measure? Noise vs. nonlinearity in different masking paradigms
... different spatial frequencies is limited by the number of cone photoreceptors contributing to the receptive field [75, ...two spatial frequencies (>18 dB in the appendix of Baldwin, Meese ...
26
Constructive spatial criticism on critical spatial construction
... does it explain ‘boundary’ production. This is so for two reasons. Firstly, if one were to look through Giddens’ (1984) book ‘The Constitution of Society’ it is riddled with references to how interaction of this ...
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NIKA2 observations around LBV stars Emission from stars and circumstellar material
... NIKA2 frequencies (150 and 260 GHz) are in the range where thermal dust and free-free emission compete, and hence NIKA2 has the capacity to provide key information about the spatial distribution of ...
8
Effects of Prescribed Fire at Two Frequencies on N Mineralization and Nitrification at Two Spatial Scales in Mixed-Oak Forests
... in spatial structure, if indeed such a relationship between fire and patchiness exists in other forested ecosystem ...generating spatial heterogeneity in these landscapes (Boerner and Kooser, ...
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