The Hermann Grid Illusion Revisited

  title={The Hermann Grid Illusion Revisited},
  author={Peter H. Schiller and Christina E. Carvey},
  pages={1375 - 1397}
The Hermann grid illusion consists of smudges perceived at the intersections of a white grid presented on a black background. In 1960 the effect was first explained by a theory advanced by Baumgartner suggesting the illusory effect is due to differences in the discharge characteristics of retinal ganglion cells when their receptive fields fall along the intersections versus when they fall along non-intersecting regions of the grid. Since then, others have claimed that this theory might not be… 
Outer plexiform layer receptive fields as underlying factors of the Hermann grid illusion
The Hermann grid was first described and discussed by the physiologist Ludimar Hermann in 1870. It is composed of white horizontal and vertical bars on a black background [1]. Subjects perceive black
Straightness as the Main Factor of the Hermann Grid Illusion
The main cause of the Hermann grid illusion is the straightness of the edges of the grid lines, and a theory is proposed which explains why the illusory spots occur in the original Hermann Grid and why they disappear in curved grids.
The role of orientation processing in the scintillating grid illusion
The results revealed that the illusion was attenuated when the patch was located at the intersection of short bars, irrespective of the spatial distance between patches, and the activity of S1-type simple cells that respond to the luminance along an oriented edge across the intersection was investigated.
Hermann Grid Optical Illusion and The Rebelling Dots of Reality
  • K. Das
  • History
    International Journal of Scientific and Research Publications (IJSRP)
  • 2021
In 1870, Ludimar Hermann reported an optical illusion that has been popularized thereafter after his name. In this Hermann Grid illusion, we see either white grid upon the background of complete
The Effects of Curvature on the Grid Illusions
Curvature of the alleys induces a general tendency to inhibit the visibility of features, and is not specifically a repression of illusory effects.
Capturing Lightness between Contours
The experiments reveal that the induced lightness differences are independent of the luminance polarity and shape of the contours at the intersection, and suggest that the effect results from lateral inhibition and an additional spreading and capturing of these differences between luminance contours.
Experimental Observations of the Visibility Threshold of Illusory effects in Hermann Grid, Sinusoidal and Square Gratings and their Possible Implications
Experimental studies have been conducted on the Sinusoidal Grating, Square Grating and Hermann Grid Illusions. Volunteers were presented with a range of input stimuli and asked to report the
Spillmann’s weaves are more resilient than Hermann’s grid
Eggs illusion: Local shape deformation generated by a grid pattern.
A new visual shape illusion is reported, the eggs illusion, in which circular disks located at the midpoints between adjacent grid intersections are perceived as being deformed to ellipses, which suggests a possibility that similar mechanisms underlie the two phenomena.
Exploring the Extent in the Visual Field of the Honeycomb and Extinction Illusions
Two cases, known as the Extinction illusion and the Honeycomb illusion, involving small disks and lines, respectively, presented over a large extent of the visual field are studied, finding a dissociation between the two illusions in the dependence on contrast polarity suggesting different mechanisms.


A stereoscopic presentation of the hermann grid
Global Factors in the Hermann Grid Illusion
The results suggest that a purely local model for the Hermann grid illusion is not a complete explanation, and global factors must be involved.
The Hermann Grid Illusion: A Tool for Studying Human Perceptive Field Organization
The Hermann grid illusion is weakened when the grid is presented diagonally, which suggests a contribution by the orientation-sensitive cells in the lateral geniculate nucleus and visual cortex, and is consistent with the reduction of the center—surround antagonism in retinal receptive fields.
The orientation dependence of the Hermann grid illusion
The quantitative reduction of the HGI elicited by the oblique pattern tested and its reduction to almost zero in some subjects, constitute a benchmark for any model aimed at explaining the Hermann grid illusion on psychophysical grounds.
Illusory colour changes in Hermann grids varying only in hue
Saturation enhancement in colored hermann grids varying only in chroma
Receptive fields, binocular interaction and functional architecture in the cat's visual cortex
This method is used to examine receptive fields of a more complex type and to make additional observations on binocular interaction and this approach is necessary in order to understand the behaviour of individual cells, but it fails to deal with the problem of the relationship of one cell to its neighbours.
Contrast enhancement in a Hermann grid with variable figure-ground ratio
An optimum grid was devised that shows maximum brightness changes at almost every intersection, even when fixated foveally, and is interpreted in terms of Baumgartner's receptive field hypothesis.