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Spatial/spatial-frequency representations for image segmentation and grouping
Image and Vision Computing, 1991Abstract In this paper, we consider the application of spatial/ spatial-frequency representations to texture-based image segmentation and to perceptual grouping, a related phenomenon. We discuss a system for segmentation and grouping, based on the pseudo-Wigner distribution (PWD) a discrete approximation to the WD, and show experimental results.
Todd R. Reed, Harry Wechsler
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Applied Optics, 2015
Frequency variation in spatial frequency domain imaging is a powerful tool for adjusting the penetration depth of the imaging signal and the parameter sensitivity toward absorption and diffusive and subdiffusive scattering. Through our computational analysis, using an analytical solution of the radiative transfer equation, we add quantitation to this ...
Nico, Bodenschatz +4 more
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Frequency variation in spatial frequency domain imaging is a powerful tool for adjusting the penetration depth of the imaging signal and the parameter sensitivity toward absorption and diffusive and subdiffusive scattering. Through our computational analysis, using an analytical solution of the radiative transfer equation, we add quantitation to this ...
Nico, Bodenschatz +4 more
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Spatial Frequency and Lightness
Color and Imaging Conference, 2004Moroney, Nathan, Süsstrunk, Sabine
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Contrast and Spatial Frequency
Scientific American, 1974F W, Campbell, L, Maffei
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The Spatial and Frequency Domains
2009The interconversion between spatial and frequency domains using Fourier and other transforms is of critical importance in image processing and, for some imaging methods, the construction of images from raw scan data. A significant feature of the transforms is that we can convert back and forth between spatial and frequency domains without loss of ...
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covariation between cortical magnification and preferred spatial frequency in human V1 measured using ...
Himmelberg, Marc +3 more
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Himmelberg, Marc +3 more
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2012
A certain number of scanned lines ( line images ) in a real-life image may display sinusoidal intensity profiles, but not all line images along the x or y axis are likely to contain sinusoidal or periodic intensity variations. Despite the nonperiodic nature of line images, and hence the whole image frame, the frequency spectrum of an image or an ...
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A certain number of scanned lines ( line images ) in a real-life image may display sinusoidal intensity profiles, but not all line images along the x or y axis are likely to contain sinusoidal or periodic intensity variations. Despite the nonperiodic nature of line images, and hence the whole image frame, the frequency spectrum of an image or an ...
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Frequency and Spatial Dual Guidance for Image Dehazing
Lecture Notes in Computer Science, 2022Man Zhou, Zeyu Xiao
exaly
Time‐Frequency Spatial‐Spatial Frequency Representationsa
Annals of the New York Academy of Sciences, 1997openaire +1 more source