Christopher Tyler

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Christopher W. Tyler
NationalityBritish
Alma mater
Scientific career
FieldsNeuroscience

Christopher William Tyler is a neuroscientist,[1] creator of the autostereogram ("Magic Eye" pictures),[2] and is the Head of the Brain Imaging Center at the Smith-Kettlewell Eye Research Institute[1] He also holds a professorship at City University of London.[3]

Biography[edit]

After earning his PhD from the University of Keele (1970), Tyler became a research fellow at Bell Labs (1974–75), where he worked with Bela Julesz, a vision scientist, psychologist, and MacArthur Fellow. Julesz is well known for his invention of the random dot stereogram, for which he used a computer to create a stereo pair of random-dot images. Although nothing except random dots can be seen in each pair, when people look through a stereoscope so that the left image is viewed only by the left eye and the right image is viewed only by the right eye, they see three-dimensional shapes. After leaving Bell Labs, Tyler took a position at Smith-Kettlewell Institute of Visual Sciences.

Tyler's scientific interests are in visual perception and visual neuroscience. His research has contributed to the study of form, symmetry, flicker, motion, color, and stereoscopic depth perception in adults and he has developed tests for the diagnosis of eye diseases in infants and of retinal and optic nerve diseases in adults. He has studied visual processing and photoreceptor dynamics in other species such as butterflies and fish.

Tyler's recent scientific work concerns theoretical, psychophysical, and functional MRI studies of the structure of global processes such as structure from motion, symmetry, figure/ground and stereoscopic depth perception, and their susceptibility to damage in traumatic brain injury.

Tyler's present and recent past associates include Lora Likova, Josh Solomon, Chien-Chung Chen, Spero Nicholas, Mark Schira, Lenny Kontsevich, Russ Hamer, Anthony Norcia, Lauren Barghout, Amy Ione.[4]

Autostereogram[edit]

Shortly after arriving at Smith-Kettlewell (in 1979) Tyler significantly advanced Julesz's random dot stereogram research when he invented the random-dot autostereogram. Such autostereograms made it possible for a person to see 3-dimensional shapes from a single 2-dimensional image without the aid of a stereoscope.[5] These images were later known as the “Magic Eye” after they were popularized by several N.E. Thing Enterprises publications that spent a number of weeks on the New York Times Bestsellers list.

Art Investigations[edit]

Tyler's art investigation articles fall under various topics, including composition,[6] perspective studies, the eye-centering controversy,[7][8] David Hockney's optical hypothesis,[9] Leonardo self-portraiture, Manet's last painting A Bar at the Folies-Bergère, Masolino, space in 20th-century art, symmetry: art and neuroscience, the structure of consciousness, and computer art.[10][11]

Tyler also has made convincing arguments against the thesis supported by Hockney's book Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters that optical projection techniques aided many artist's paintings beginning in the early 15th century, but spread over about two centuries between 1420 and 1595,[9] citing variously Fabriano, Jan van Eyck, Pisanello, Mantegna, Melozzo di Forli, Cranach, Raphael and Moroni. Tyler showed with geometric reconstructions at his web site[12] that the art works under discussion are brilliant paintings by eye rather than those compatible with optical projections.[13]

Octant projection[edit]

Outline of the projection Da Vinci octant in the Codex Atlanticus

The octant projection[14][15][16] or octants projection is a type of projection[17] proposed for the first time, in 1508, by Leonardo da Vinci in his Codex Atlanticus.[18] Tyler demonstrated Leonardo's authorship, who stated "For those projections dated later than 1508, his drawings should be effectively considered the original precursors ...".[18] Tyler argued his case by separating Leonardo's projection authorship (1508) from Leonardo's map authorship (1514), unlike other authors who had treated the authorship of both map and projection together.[18]

Consciousness Studies[edit]

Tyler's interests in the nature of consciousness have resulted in a reconceptualization of the essence of quantum physics, in which the Schrödingerian superposition of states is expressed as an inherent property of the conception of probability held by the conscious investigator rather than a property of the physical system per se [FoM paper]. While this retains the role of consciousness in the quantum framework, by casting the superposition solely as a property of the neural conceptualization, it resolves many of the paradoxes of quantum physics within the domain of classical physics.[clarification needed]

References[edit]

  1. ^ a b Smith Kettlewell Eye Research Institute. "Christopher Tyler".
  2. ^ "Magic Eye FAQ". Archived from the original on 10 October 2018. Retrieved 15 May 2017.
  3. ^ City University of London (31 January 2020). "Christopher Tyler".
  4. ^ "Tyler Lab". Archived from the original on 12 February 2018. Retrieved 15 May 2017.
  5. ^ Christopher Tyler. "website".
  6. ^ Tyler, C. W. (30 July 1999). "NEUROSCIENCE:Enhanced: Is Art Lawful?". Science. 285 (5428): 673–674. doi:10.1126/science.285.5428.673. PMID 10454922. S2CID 142590965.
  7. ^ Tyler, Christopher W. (30 April 1998). "Painters centre one eye in portraits". Nature. 392 (6679): 877–878. Bibcode:1998Natur.392..877T. doi:10.1038/31833. S2CID 205001515.
  8. ^ Sandra Blakeslee (5 May 1998). "In Paintings Eyes, Artists Go Halfway". The New York Times.
  9. ^ a b Tyler, Christopher (2004). "Rosetta Stone? Hockney, Falco and the Sources of "Opticality" in Lorenzo Lotto's "Husband and Wife"". Leonardo. 37 (5): 397–401. doi:10.1162/0024094041955971. JSTOR 1577681. S2CID 57568301.
  10. ^ Statement by Christopher Tyler. "Leavitt, Ruth. 1976. Artist and Computer. New York: Harmony Books". {{cite web}}: |author= has generic name (help)
  11. ^ Referring to Tyler’s statement in Ruth Leavitt’s Computer and Art, Rudolf Arnheim wrote in his 1987 book, New Essays on the Psychology of Art, that he was influenced here by a striking remark he found in an article by a California computer artist, Christopher William Tyler (5, p. 88). Arnheim noted that Tyler observed that "one of the trends of recent art has been the tendency to operate by selecting from an environment entities that have significance to the artist rather than creating from scratch on a tabula rasa … The instruments which are thought of as tools at the disposal of the artist become part of the environment in which the art is produced.” (p. 127) Arnheim, Rudolf (11 March 1986). New Essays on the Psychology of Art. ISBN 9780520907843.
  12. ^ "Art and Optics website".
  13. ^ "Christopher Tyler's Art Investigations".
  14. ^ Octant-projection (art of geography) Archived 2016-03-04 at the Wayback Machine
  15. ^ Progonos-map-projections
  16. ^ "Csiss.org-map-projections". Archived from the original on 2 October 2019. Retrieved 8 December 2017.
  17. ^ Geological Survey (U.S.) (1988). Bibliography of map projections. U.S. G.P.O. pp. 73–.
  18. ^ a b c Tyler, C.W. (2017). "Leonardo da Vinci's World Map" (PDF). Journal of the International Map Collector's Society (149 Summer): 21–31.
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