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  1. #21
    Join Date
    Feb 2015
    Location
    Riverside, CA
    Posts
    217

    Default Re: Illusion or not?!

    If you replace the cyan with magenta the effect would be green. Replace with yellow and you get blue. Pretty much basic pigment/light color wheel interaction. Now the question remains can such an illusion be used in a stereogram. What do you think, Dr. Priester?

  2. #22
    Join Date
    Aug 2000
    Location
    Placitas, New Mexico, USA
    Posts
    41,486

    Default Re: Illusion or not?!

    Now the question remains can such an illusion be used in a stereogram. What do you think, Dr. Priester?
    I guess. But not one of mine. I would not have the foggiest idea how to create that effect.

  3. #23
    Join Date
    Aug 2000
    Location
    Placitas, New Mexico, USA
    Posts
    41,486

    Default Re: Illusion or not?!

    OK My conclusions. Blaaaaaaaaaa! Bogus

    Here's why. If your brain sees red because it expects to see red, then why not if the color is removed from the photo. Eh?

    If you change the color of blue green (the complementary or opposite color on the color wheel from red) to yellow, the can now appears to be purple, the complementary color to yellow.

    Finally stare at the three blue green stripes on the left of the third image for ten seconds. Then focus on the white side for the same amount of time. You should see a negative afterimage of red.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #24
    Join Date
    Feb 2007
    Location
    UK
    Posts
    21,283

    Default Re: Illusion or not?!

    they are not called complementary colours for nothing gary... are they ?

    that's why when you paint you need to know how colours enhance/distract from each other

    I'd call the after image very pale pink
    -------------------------------
    Nothing lasts forever...

 

 

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