Let's make an illusion image 2
since July 10, 2015 
"Luminance-gradient-dependent lightness illusion"
A demo of lightness perception pic.twitter.com/BSVpgcuIw1
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年8月12日

Copyright Akiyoshi Kitaoka 2015 (July 4)

Click the image and you will download a high-resolution file.

Click the image and you will download a high-resolution file.

Click the image and you will download a high-resolution file.
![]()


Squares are of the same luminance gradient.
Copyright Akiyoshi Kitaoka 2015 (July 4)


Copyright Akiyoshi Kitaoka 2015 (July 4)
Movie demo: lightness02-00237.mp4
Copyright Akiyoshi Kitaoka 2015 (November 18)
Copyright Akiyoshi Kitaoka 2018 (August 14)

A schematic explanation
Professor Alan Gilchrist's talk in Ritsumeikan (March 17, 2006)
"Rotating snakes"

Copyright Akiyoshi Kitaoka 2015 (July 8)

(Click it and you will download a high-resolution file)
"Footstep illusion"

Copyright Akiyoshi Kitaoka 2015 (July 7)

Copyright Akiyoshi Kitaoka 2018 (June 18)

Copyright Akiyoshi Kitaoka 2018 (June 18)

(Click it and you will download a high-resolution file)
Copyright Akiyoshi Kitaoka 2015 (June 9)
Anstis, S. M. (2001). Footsteps and inchworms: Illusions show that contrast modulates motion salience. Perception, 30(7), 785-794.


Copyright Akiyoshi Kitaoka 2016 (November 11)
"Chromatic scintillating grid illusion"

Copyright Akiyoshi Kitaoka 2015 (July 6)

Hermann grid illusion and an image to make a chromatic scintillating grid
illusion demo (Click it and you will download a high-resolution file)
Copyright Akiyoshi Kitaoka 2015 ((July 6)

      
      Schrauf, M., Lingelbach, B., Wist, E.R. (1997) The scintillating grid illusion. Vision Research, 37, 1033-1038. 
"Scintillating grid illusion 2"

Copyright Akiyoshi Kitaoka 2015 (July 6)

Hermann grid illusion and an image to make an scintillating grid illusion
demo (Click it and you will download a high-resolution file)
Copyright Akiyoshi Kitaoka 2015 ((July 6)

      
      Schrauf, M., Lingelbach, B., Wist, E.R. (1997) The scintillating grid illusion. Vision Research, 37, 1033-1038. 
"Optimized Fraser-Wilcox illusion, Type IIa"

Copyright Akiyoshi Kitaoka 2015 (July 4)

Click the image and you will download a high-resolution file.
"Munker illusion"

Copyright Akiyoshi Kitaoka 2015 (June 9)

Click the image and you will download a high-resolution file.


Copyright Akiyoshi Kitaoka 2015 (June 29)


Copyright Akiyoshi Kitaoka 2015 (July 9)
---
Yellowish illusion

Click the image and you will download a high-resolution file.

Copyright Akiyoshi Kitaoka 2016 (February 17)

"White effect"

Copyright Akiyoshi Kitaoka 2015 (June 7)

Click the image and you will download a high-resolution file.

White, M. (1979) A new effect on perceived lightness. Perception, 8, 413-416.