Illusion news 13

since September 13, 2009

The fractal spiral illusion and some geometrical illusions are explained by means of the framelet analysis. <June 22, 2010>

Arai, H. and Arai, S. (2010) Framelet analysis of some geometrical illusions. Japan Journal of Industrial and Applied Mathematics, 27, 23–46.

The PDF is 'open access' (available free of charge) !

Professor Arai's fractal spiral illusion

Copyright Hitoshi & Shinobu Arai 2007 (October 4)

Hyperbolic illusion of the Fraser illusion new!

Copyright Hitoshi & Shinobu Arai 2010 (June 23)

Hyperbolic illusion of the illusion of fringed edges new!

Copyright Hitoshi & Shinobu Arai 2010 (June 23)


Copyright Hitoshi & Shinobu Arai 2010 (June 23)

Akiyoshi went to U S A last Saturday.

U S A is located in Japan. In addition, "Obama" is also located in Japan.

  Usa-Jingu Shrine, Oita, Japan

<June 14, 2010>

The Pinna illusion has been listed in Akiyoshi's illusion catalog page. <June 4, 2010>

Pinna illusion

(Pinna and Brelstaff, 2000)

Rings appear to rotate when observers approach or leave the image fixing their eyes on the center. new!


Pinna, B. and Brelstaff, G. J. (2000) A new visual illusion of relative motion. Vision Research, 40, 2091-2096.

The Japanese Psychological Association has been inviting the 31th International Congress of Psychology (ICP 2016). <May 25, 2010> > New Articles Published > Issue 5 of Colour: Design & Creativity

More content has been published in Issue 5. When new articles are available online, a weekly e-cast will be issued to all subscribers.
This latest issue is a
special issue published in association with the International Colour Association (AIC)

Issue 5

   AIC Special Issue



    A Brief Classification of Colour Illusions,
Akiyoshi Kitaoka (Japan)




    History of Japanese Colour,
    by Sachio Yoshioka (Japan)

Submit your work to the journal

All submissions to the journal undergo peer-review by experts in the field. Full author guidelines are available at: To submit a paper, please email:  

To contact the editorial office, click here.

Full contents listing: An 'at a glance' searchable document with a full article listing (in PDF format) is available here.

Kitaoka, A. (2010) A brief classification of colour illusions. Colour: Design & Creativity, 5 (3), 1-9. new!

<May 23, 2010>

(According to Professor Tom Troscianko CVNet issued on 19 May 2010)

Professor Richard Langton Gregory has passed away on 17 May 2010 at the Bristol Royal Infirmary, after suffering a stroke. (1923 - 2010)

Richard's website:

<May 19, 2010>

Scientific American Mind, Special Issue: 169 Best Illusions (2010). new!

<May 18, 2010>

The TOP THREE winners of the 2010 "Best Illusion of the Year Contest" are:

- 1st PRIZE: Koukichi Sugihara (Meiji Institute, Japan) -- "Impossible motion: magnet-like slopes"

- 2nd PRIZE: Bart Anderson (University of Sydney, Australia) -- "Counter‐intuitive illusory contours"

- 3rd PRIZE:  Jan Kremlacek (Charles University, Czech Republic)--" Two sinusoids: 6 – 1 perceptions"

Check out the WINNING ILLUSIONS, and all TOP TEN finalists at:
The winners took home a "Guido", a trophy designed by the renowned Italian sculptor Guido Moretti.

The "Best Illusion of the Year Contest" Gala (sponsored by Scientific American and held on May 10th in Naples FL) was a huge success, drawing international coverage from Nature, Discover, Scientific American, Fox News, and many other media outlets. The winning illusion by Sugihara has moreover become YouTube’s spotlight video for Science & Technology!

If you took PICTURES or VIDEOS of the event, please send them to us!

The Contest is hosted by the Neural Correlate Society, a non-profit organization whose mission is to promote public awareness of neuroscience research and discovery. We rely on your donations to maintain the Contest’s online illusion archive and to ensure that the Contest Gala remains free and open to the public. Please visit our website ( and make a Paypal donation to support the contest (all donations are tax deductible and every dollar helps!).

Congratulations to the 2010 TOP 10 contestants and the TOP 3 winners for their fantastic illusions!

Xoana Troncoso (Illusion Contest Coordinator)
Susana Martinez-Conde (President, Neural Correlate Society)

On behalf of the Executive Board of the Neural Correlate Society:
Stephen Macknik, Jose-Manuel Alonso, Susana Martinez-Conde, Luis Martinez, Xoana Troncoso, Peter Tse

<May 15, 2010>


Professor Kokichi SUGIHARA's work has won the First prize of the 6th Annual Best Illusion of the Year Contest!!


<May 11, 2010>

cf. The 1st Illusion Contest in Japan

The TOP TEN illusions for the Best Illusion of the Year Contest have been chosen!!

The Best Illusion of the Year Contest, now sponsored by Scientific American, is an Official Satellite of the Vision Sciences Society (VSS) conference. The Contest Gala will be on Monday, May 10th, 5-7pm, in the Philharmonic Center of Arts (Naples, FL). Doors will open at 4.30pm.

Hosted by the inimitable Stuart Anstis!
With a special appearance by The Amaz!ng Randi, the renowned magician, escapologist, and skeptic!
Everybody is invited and families are welcome!!

Who will the TOP THREE winners be??? That’s up to YOU! The audience will choose them.
For more details, please visit our webpage:

2010 TOP TEN ILLUSION CONTESTANTS (alphabetical order):

“Counter‐intuitive illusory contours”, by Bart Anderson (University of Sydney, Australia)

“Two sinusoids: 6-1 perceptions’’, by Jan Kremlacek (Charles University in Prague, Czech Republic)

“Stretching out in the tub”, by Lydia Maniatis (American University, USA)

“The steerable spiral”, by Peter Meilstrup & Michael Shadlen (University of Washington, USA)

“The monkey-business illusion”, by Daniel Simons (University of Illinois, USA)

“Impossible motion: magnet-like slopes”, by Koukichi Sugihara (Meiji Institute for Advanced Study of Mathematical Sciences, Japan)

“The blurry heart illusion”, by Kohske Takahashi, Ryosuke Miimi & Katsumi Watanabe (University of Tokyo, Japan)

“The fat face thin (fft) illusion”, by Peter Thompson (University of York, UK)

“Attention-biased after-image rivalry”, by Peter Tse (Dartmouth College, USA)

“Illusory gloss”, by Maarten Wijntjes & Sylvia Pont (Delft University of Technology, The Netherlands)

To see the illusions themselves… you must come to the CONTEST!!!

Xoana Troncoso (Illusion Contest Coordinator)
Susana Martinez-Conde (President, Neural Correlate Society)

On behalf of the Executive Board of the Neural Correlate Society:
Stephen Macknik, Jose-Manuel Alonso, Susana Martinez-Conde, Luis Martinez, Xoana Troncoso, Peter Tse

The Neural Correlate Society is a tax-exempt 501(c)3 non-profit organization, whose mission is to promote the public awareness of vision research.

<April 15, 2010>


*** We are happy to announce the world's 6th annual Best Visual Illusion of the Year Contest!!***
The deadline for illusion submissions is February 15th, 2010!

The 2010 contest will be held in Naples, Florida (Naples Philharmonic Center for the Arts, on Monday, May 10th, 2010, as an official satellite of the Vision Sciences Society (VSS) conference. The Naples Philharmonic Center is an 8-minute walk from the main VSS headquarters hotel in Naples, and is thus central to the VSS conference.

Past contests have been highly successful in drawing public attention to vision research, with over ***FOUR MILLION*** website hits from viewers all over the world, as well as hundreds of international media stories. The First, Second and Third Prize winners at the 2009 contest were Arthur Shapiro, Zhong-Lin Lu, Emily Knight, & Robert Ennis (American University, University of Southern California, Dartmouth College, SUNY College of Optometry, USA), Yuval Barkan & Hedva Spitzer (Tel-Aviv University, Israel), and Richard Russel (Harvard University, USA).

To see the illusions, photo galleries and other highlights from the 2009 and previous contests, go to

Illusion submissions can be novel visual, cognitive, or multimodal illusions (unpublished, or published no earlier than 2009) in standard image, movie or html formats. Exciting new variants of classic or known illusions are also admissible. An international panel of impartial judges will rate the submissions and narrow them to the TOP TEN. Then, at the Contest Gala in Naples, the TOP TEN illusionists will present their contributions and the attendees of the event (that means you!) will vote to pick the TOP THREE WINNERS!

Illusions submitted to previous editions of the contest can be re-submitted to the 2010 contest, so long as they meet the above requirements and were not among the TOP THREE winners in previous years.
Submissions will be held in strict confidence by the panel of judges and the authors/creators will retain full copyright. No illusions will be posted on the illusion contest's website without the creators' explicit permission. As with submitting your work to any scientific conference, participating in to the Best Illusion of the Year Contest does not preclude you from also submitting your work for publication elsewhere.

Submissions can be made to Dr. Xoana Troncoso (Illusion Contest Coordinator, Neural Correlate Society) via email (x.troncoso(atmark) until February 15, 2010. Illusion submissions should come with a (no more than) one-page description of the illusion and its theoretical underpinnings (if known). Illusions will be rated according to:

. Significance to our understanding of the visual system
. Simplicity of the description
. Sheer beauty
. Counterintuitive quality
. Spectacularity

Visit the illusion contest website for further information and to see last year's illusions:

Submit your ideas now and take home this prestigious award!

Xoana Troncoso (Illusion Contest Coordinator)
Susana Martinez-Conde (President, Neural Correlate Society)

On behalf of the Executive Board of the Neural Correlate Society:
Jose-Manuel Alonso, Stephen Macknik, Susana Martinez-Conde, Luis Martinez, Xoana Troncoso, Peter Tse

<January 23, 2010>

A student from Serbia has produced the tilt illusion of Serbian letters. <November 25, 2009>

"Serbian tilt illusion"

The first, third and fifth rows of Latin letters appear to tilt counterclockwise, while the second and fourth rows of Cyrillic letters clockwise. This image is probably the first of the tilt illusion using Serbian letters.

oбoa = oboe, taketa = an artificial word Köhler used, zvezda = star

Copyright Stevanov, J. 2009 (November 24)
from Jasmina, Department of Psychology, Ritsumeikan University

A Japanese mathematician Professor Hitoshi ARAI, University of Tokyo has discovered the tilt illusion of mathematical formulas. <November 2, 2009>

Illusion coins are sold all over the USA (?) ( and illusion coasters are distributed at the National Museum of Nature and Science in Tokyo by the Ritsumeikan University until November 8. <November 2, 2009>

The Serb version of "Akiyoshi's illusion page" has started! <October 20, 2009>

Zahvaljujem se Jasmini

Illusion calender "3D Trick Eyes" for 2010 is sold in Japan. <October 19, 2009>

Try J-List or CDJAPAN

A session "Visual Illusions and Effects" will be held in AIC2009 on Tuesday (September 29, 2009).

11th Congress of the International Colour Association (AIC) 2009

University of New South Wales, Sydney, Australia

<September 13, 2009>

Illusion news 12 (March 2009 - June 2009)

Illusion news 11 (September 2008 - January 2009)

Illusion news 10 (May 2008 - September 2008)

Illusion news 9 (February 2008 - April 2008)

Illusion news 8 (November 2007 - February 2008)

Illusion news 7 (September 2007 - October 2007)

Illusion news 6 (June 2007 - September 2007)

Illusion news 5 (January 2007 - May 2007)

Illusion news 4 (January 2006 - December 2006)

Illusion news 3 (January 2006 - May 2006)

Illusion news 2 (April 2005 - December 2005)

Illusion news 1 (2002 - March 2005)

Akiyoshi's illusion pages