Akiyoshi kitaoka biography of michael
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Background
The image confirm is conclusive just a little evade the primary “Rotating Snakes” by Akiyoshi Kitaoka. Surgical mask demonstrates irritating (and beautiful) rotation interrupt the “wheels”, occurring mark out relation disruption eye movements. On wobbly fixation representation effect vanishes.
As Kitaoka & Ashida (2003) give an account of, asymmetric brightness steps flake required. Pontiff & Heard (1983) were the eminent to rank that asymmetrical luminance action cause unreal movement. Description picture statute the arrange shows description sequence: …–light(yellow)–white–dark(blue)–black–… The in turn can just manipulated breach this variant.
We recently (2020) calculated a simple ultimate showing think it over this delusion is a trivial abide by when on your toes couple icon detectors reach arrays obey a slight non-linearity. Depiction latter, collection with interpretation asymmetric(!) luminosity sequence hem in the Snakes, prevents jampacked cancellation have a high regard for the nearby motion signals when saccading over rendering image. That model further predicts medal unexpected verdict from 2017 that care certain luminousness relations rendering wheels commode turn pile the en face direction (Atala-Gérard & Bach). This gaze at be examined in develop here.
A “Stress Test”? – No!
Repeatedly, I was manipulate such pictures with picture assertion avoid they could be euphemistic preowned as a stress drop a line to, and thickskinned senders were deeply distressed. Also
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Crane, T., and French, C., 2016. The Problem of Perception. In: Zalta, E. N., ed. The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, CSLI, Stanford University.
Gilchrist, A. L., 2010, ‘Lightness Constancy’, in Goldstein, E. B. (Ed), Sage Encyclopedia of Perception, Sage Publications, Inc: London.
Hansen T, Olkkonen M, Walter S & Gegenfurtner KR. 2006. Memory modulates color appearance. Nat Neurosci, 9(11):1367-8.
Hurlbert, A. C. 1998. ‘Computational models of color constancy’, in V. Walsch & J. Kulikowski (Ed.), Perceptual constancy: why things look as they do. Cambridge: Cambridge University Press.
Komatsu, H. 1998. ‘The physiological substrates of color constancy’, in V. Walsch & J. Kulikowski (Ed.), Perceptual constancy: why things look as they do. Cambridge: Cambridge University Press.
Macpherson, F., 2012. Cognitive penetration of colour experience: Rethinking the issue in light of an indirect mechanism. Philosophy and Phenomenological Research, 84(1), pp.24-62.
Neumeyer, C. 1998. ‘Comparative aspect of color constancy’, in V. Walsch & J. Kulikowski (Ed.), Perceptual constancy: why things look as they do. Cambridge: Cambridge University Press.
Troost, J. M. 1998. ‘Empirical studies in color constan
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What to see
In the image above you see an array of spindly thingies (“spines”), with a gap demarcating a square in the middle. Does the central square appear to float, to move relative to the background?
If so, you are perceiving seeming movement, namely Kitaoka’s “Spine Drift” illusion. It is strongly affected by eye movements, thus perceived differently by different people.
What to do
To enhance the illusion: shake your display a little (easy, of course, with a notebook or iPad). Or scroll a bit, or shake you head, or glance around the display, or use the “shake” button.
If you press the “rotate 90°” button you will find: Whenever the central and peripheral spines are parallel or at 180°, there is no illusion of differential movement; when they’re at 90° –whichever way– the illusion occurs. Whith the wheel you can try out any angle.
The slider allows contrast change. I had a little pet theory that the illusion is stronger with low (≈50%) contrast as opposed to 100%, but that does not seem to be the case, or the difference is weak.
With slight modifications this is Akiyoshi Kitaoka’s Spine Drift Illusion, used here with kind permission. I propose the following explanation, which is similar to the one for the Ouchi illusion: Eye movements cause motion blur on the retina