Color illusion 16

Color illusion 16

Since April 17, 2016

"Illusory blue and illusory green from yellow"

There appear to be bluish spirals and greenish ones, though they are actually the same color and are yellowish.

"Illusory red-purple and illusory orange from gray"

There appear to be red-purple spirals and orange ones, though they are actually the same color and are light gray.

"Reddish strawberries"

This image consists of pixels of cyan or near-cyan hue, without pixels of red, but strawberries appear to be reddish.

"Illusory blue"

No blue in each pixel.

"Color eyes"

The inset of the left block appears to be purplish-red whereas that of the right one appears to be orange, though they are the same color.

The inset of the left block appears to be purplish-red whereas that of the right one appears to be orange, though they are the same color. pic.twitter.com/Glm8SLBh3B
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年2月24日

Could you report your perception?
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年2月24日

"Chromatic (?) Craik-O'Brien-Cornsweet effect"

Areas flanked by orange borders appear to be tinted orange.

cf.
Wachtler, T. and Wehrhahn, C. (1997). The Craik-O'Brien-Cornsweet illusion in colour: quantitative characterisation and comparison with luminance. Perception, 26(11),1423-1430.

Chromatic (?) Craik-O'Brien-Cornsweet effect pic.twitter.com/KxcIOyGbBe
— Akiyoshi Kitaoka (@AkiyoshiKitaoka) 2018年2月22日

"Eye color constancy illusion demo 2016"

~~"Reddish strawberries"~~

The eyes appear to be reddish, yellowish, greenish, and bluish from the left, but they are ~~bearky~~ nearly the same gray.

corrected on March 2, 2018; title corrected on March 8, 2018

This image is registered in Visiome.

Visiome Platform is a web-based database system with a variety of digital research resources in Vision Science. More info

"Reddish strawberries"

This image consists of pixels of cyan or near-cyan hue, without pixels of red, but strawberries appear to be reddish. This image is produced with the additive color change (alpha blending) with cyan (53% transmittance).

"Reddish strawberries 2"

This image consists of pixels of cyan hue, without pixels of red, but strawberries appear to be reddish. This image is produced with the two color method with the axis of cyan (20% transmittance).

Original image

"Yellowish white heart"

The left heart appears to be yellowish whereas the right one white, though they are the same white.

"Bluish black heart"

The right heart appears to be bluish whereas the left one black, though they are the same black.

"Orange- and pink-tinted hearts"

The left heart appears to be pale orange whereas the right one pale pink though they are the same gray.

"Winding roads"

In each image, the curve appears to be tinted with the opposite color of the background, though it is the same hue. Specifically, the curve in the top left image appears to be bluish, though the color is actually yellowish hue...

"Orange heart and red-purple heart"

The left heart is constantly red and the right one is red-purple, but the reversal is observed for 1.5 seconds within 3 seconds.

"White and black with RGB"

The hair and clothes in the left image appear to be white whereas those in the right one appear to be black. Actually, they are the same color stripes of RGB.

"White and black with CMY"

The hair and clothes in the left image appear to be white whereas those in the right one appear to be black. Actually, they are the same color stripes of CMY.

Original image

"White and black with RC"

The hair in the upper image appear to be white whereas those in the lower one appear to be black. Actually, they are the same color stripes of red and cyan.