Journal ArticleDOI
Foveal blur discrimination of the human eye.
Bin Wang,Kenneth J. Ciuffreda +1 more
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TLDR
The difference in magnitude between these two thresholds may be attributed to the defocus‐related change in the ocular modulation transfer function (MTF) and its interaction with contrast discrimination ability, as well as to the presence of a neuroperceptual blur buffering mechanism.About:
This article is published in Ophthalmic and Physiological Optics.The article was published on 2005-01-01. It has received 32 citations till now. The article focuses on the topics: Foveal.read more
Citations
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Journal ArticleDOI
Optimal defocus estimation in individual natural images
Johannes Burge,Wilson S. Geisler +1 more
TL;DR: A principled general framework for analyzing the psychophysics and neurophysiology of defocus estimation in species across the animal kingdom and for developing optimal image-based defocus and depth estimation algorithms for computational vision systems is provided.
Journal ArticleDOI
Blur clarified: A review and synthesis of blur discrimination
TL;DR: It is found that specialized mechanisms are not required and that the essential features of blur discrimination are fully accounted for by the ViCE model, in which two spatial patterns are distinguished when the integrated difference between their masked local visible contrast energy responses reaches a threshold value.
Journal ArticleDOI
Blur limits for defocus, astigmatism and trefoil.
TL;DR: In this paper, the authors investigated the limits at which blur due to defocus, crossed-cylinder astigmatism, and trefoil became noticeable, troublesome or objectionable.
Blur limits for defocus, astigmatism and trefoil
TL;DR: When assessed with trefoil blur and corrected intrinsic ocular aberrations, the ratio of objectionable to noticeable blur limits in these two subjects was much higher fortrefoil than for defocus and astigmatism.
References
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Optics of the Human Eye
TL;DR: The optical structure and optical properties of the human eye are described, how the retinal image is formed and the factors affecting its quality are described.
Journal ArticleDOI
The Frequency Response of a Defocused Optical System
TL;DR: In this paper, the response of a defocused aberration-free optical system to line-frequencies in the object is studied analytically, and curves are given showing the response as a function of line-frequency for a range of values of defect of focus.
Journal ArticleDOI
Grating contrast: Discrimination may be better than detection
Jacob Nachmias,Richard Sansbury +1 more
Journal ArticleDOI
Spatial configurations for visual hyperacuity
TL;DR: Two widely-held concepts are found to lack validity: that averaging of local signs along lines or contours is a prerequisite to hyperacuity and that the detection is necessarily performed according to the criterion of explicit or implicit orientation.
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The recognition and representation of edge blur: Evidence for spatial primitives in human vision
Roger Watt,Michael J. Morgan +1 more
TL;DR: This theory is interpreted in terms of a general and primitive code for the transduction of local and widespread spatial luminance changes, in which stationary points in an approximation to the second derivative are detected and localized.
Related Papers (5)
Depth-of-focus of the human eye: theory and clinical implications.
Bin Wang,Kenneth J. Ciuffreda +1 more