The proposed method uses the spatial frequency
of the input frame to classify it as real or fake.
The CS test, which measures both spatial frequency
and CS, has superior reflection on real-life visual capability such as reading, face recognition, and driving .
Contrast sensitivity at higher spatial frequency
was lower with hyperopic refraction values.
(iii) [mathematical expression not reproducible] is the array response in the rth dimension to the mth planar wavefront (m = 1, ..., M) which is function of the spatial frequency
where p is the spatial frequency
vector of the illumination pattern and [[phi].sub.n] is a phase shift.
To make better use of edge information,  adopted the modified spatial frequency
(SF) as the external input of PCNN, which achieved a preferable fusion performance.
This framework acquires an over complete dictionary from high spatial frequency
parts of the image.
The spatial luminance CSF represents the activity of several selective cortical channels at spatial frequency
bands that may represent, at least in part, the activity of retinoic-geniculo-ribbed, parallel channels M and P.
In this algorithm, the generalized Parseval's theorem is used to transform the SAR echoes from the spatial domain to the spatial frequency
They derived the relation between the critical spatial frequency
and the film thickness and suggested that the surface modulation of thin films is likely controlled by the residual-compressive surface stress created during the separation process.
where [[omega].sub.x] and [[omega].sub.y] are the highest spatial frequencies of the spatial frequency
spectrum of the field c(x, y), which correspond to the field components with shortest periods.
Scientists, engineers, and advanced students working in modern imaging systems will use this reference for a review of operations on both 'live optical' images and captured digital images in the spatial frequency
domain and how these operations relate to methods in the spatial domain.