scholarly journals Erratum to: Variation of the magnitude of the horizontal-vertical illusion with retinal eccentricity

1970 ◽  
Vol 7 (2) ◽  
pp. 114-114
Author(s):  
D. G. Pearce ◽  
L. Matin
Keyword(s):  
Retinal Eccentricity

scholarly journals ERG signals driven by chromatic and luminance processing: Variation as a function of retinal eccentricity

2009 ◽  
Vol 9 (14) ◽  
pp. 65-65
Author(s):  
D. J. McKeefry ◽  
N. Parry ◽  
N. Challa ◽  
J. Kremers ◽  
I. Murray ◽  
...  
Keyword(s):  
Retinal Eccentricity

scholarly journals Image content is more important than Bouma’s Law for scene metamers

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Thomas SA Wallis ◽  
Christina M Funke ◽  
Alexander S Ecker ◽  
Leon A Gatys ◽  
Felix A Wichmann ◽  
...  
Keyword(s):  
Perceptual Experience ◽  
Receptive Fields ◽  
Natural Images ◽  
Retinal Eccentricity ◽  
High Fidelity ◽  
Prior Work ◽  
Visual Stream ◽  
Area V2 ◽  
Ventral Visual Stream ◽  
Stream Model

We subjectively perceive our visual field with high fidelity, yet peripheral distortions can go unnoticed and peripheral objects can be difficult to identify (crowding). Prior work showed that humans could not discriminate images synthesised to match the responses of a mid-level ventral visual stream model when information was averaged in receptive fields with a scaling of about half their retinal eccentricity. This result implicated ventral visual area V2, approximated ‘Bouma’s Law’ of crowding, and has subsequently been interpreted as a link between crowding zones, receptive field scaling, and our perceptual experience. However, this experiment never assessed natural images. We find that humans can easily discriminate real and model-generated images at V2 scaling, requiring scales at least as small as V1 receptive fields to generate metamers. We speculate that explaining why scenes look as they do may require incorporating segmentation and global organisational constraints in addition to local pooling.

Auditory facilitation of visual-target detection persists regardless of retinal eccentricity and despite wide audiovisual misalignments

2011 ◽  
Vol 213 (2-3) ◽  
pp. 167-174 ◽  
Author(s):  
Ian C. Fiebelkorn ◽  
John J. Foxe ◽  
John S. Butler ◽  
Sophie Molholm
Keyword(s):  
Target Detection ◽  
Visual Target ◽  
Retinal Eccentricity

Measurements of the detectability of hepatic hypovascular metastases as a function of retinal eccentricity in CT images

2012 ◽  
Author(s):  
Ivan Diaz ◽  
Miguel P. Eckstein ◽  
Anaïs Luyet ◽  
Pierre Bize ◽  
François O. Bochud
Keyword(s):  
Ct Images ◽  
Retinal Eccentricity

Retinal Eccentricity of Fusion Detail Affects Vergence Adaptation

1991 ◽  
Vol 68 (9) ◽  
pp. 711-717 ◽  
Author(s):  
G McCORMACK ◽  
S K FISHER ◽  
K WOLF
Keyword(s):  
Retinal Eccentricity

The Hermann Grid Illusion: A Tool for Studying Human Perceptive Field Organization

Perception ◽  
1994 ◽  
Vol 23 (6) ◽  
pp. 691-708 ◽  
Author(s):  
Lothar Spillmann
Keyword(s):  
Receptive Field ◽  
Ganglion Cells ◽  
Receptive Fields ◽  
Retinal Eccentricity ◽  
Cortical Cells ◽  
Perceptive Field ◽  
Neurophysiological Mechanisms ◽  
Field Organization ◽  
Hermann Grid Illusion ◽  
Retinal Receptive Fields

Psychophysical research on the Hermann grid illusion is reviewed and possible neurophysiological mechanisms are discussed. The illusion is most plausibly explained by lateral inhibition within the concentric receptive fields of retinal and/or geniculate ganglion cells, with contributions by the binocular orientation-specific cortical cells. Results may be summarized as follows: (a) For a strong Hermann grid illusion to be seen bar width must be matched to the mean size of receptive-field centers at any given retinal eccentricity. (b) With the use of this rationale, the diameter of foveal perceptive-field centers (the psychophysical correlate of receptive-field centers) has been found to be in the order of 4–5 min arc and that of total fields (centers plus surrounds) 18 min arc. These small diameters explain why the illusion tends to be absent in foveal vision. (c) With increasing distance from the fovea, perceptive-field centers increase to 1.7 deg at 15 deg eccentricity and then to 3.4 deg at 60 deg eccentricity. This doubling in diameter agrees with the change in size of retinal receptive-field centers in the monkey. (d) The Hermann grid illusion is diminished with dark adaptation. This finding is consistent with the reduction of the center—surround antagonism in retinal receptive fields. (e) The illusion is also weakened when the grid is presented diagonally, which suggests a contribution by the orientation-sensitive cells in the lateral geniculate nucleus and visual cortex. (f) Strong induction effects, similar to the bright and dark spots in the Hermann grid illusion, may be elicited by grids made of various shades of grey; and by grids varying only in chroma or hue. Not accounted for are: the illusory spots occurring in an outline grid ie with hollow squares, and the absence of an illusion when extra bars are added to the grid. Alternative explanations are discussed for the spurious lines connecting the illusory spots along the diagonals and the fuzzy dark bands traversing the rhombi in modified Hermann grids.

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