Ponzo Illusion Collection


So, while waiting for someone to help me fix random illusion hack, and for the Yahoo stuff to update the widget, I decided to share an interesting optical illusion collection with all of you. Previously illusions like this were posted in each separate post, but now as we all got used to them, probably better solution is to group them like this. I got this idea when I visited Dark Roasted Blend.

All of these are variations of the original Ponzo illusion. Previously I thought it’s the same phenomena as Ebinghaus illusion, but there is a slight difference. The Ponzo illusion is an optical illusion that was first demonstrated by the Italian psychologist Mario Ponzo in 1913. He then suggested that the human mind judges an object’s size based on its background. He originally showed this by drawing two identical lines across a pair of converging lines, similar to railway tracks. The upper line looked longer because we interpret the converging sides according to linear perspective as parallel lines receding into the distance – a farther object would have to be longer than a nearer one for both to produce retinal images of the same size. If this collection still wasn’t enough for you, be sure to check Ponzo variation of: soldiers, terrain vehicles, nuns, monoliths, pigglets, spheres, monsters and others .

  • Anonymous

    good Illusion!!
    wheres your surprise? :D

  • Anonymous

    The surprise is that there’s no surprise… how surprising is that?!

    • Gman

      The background gets smaller, making it look as if the figures span more windows.

    • Is da kid

      Very Very suprising xD

  • Anonymous

    last 2 were the best

  • Felix

    I’d call it lame. Just foreshortening.

  • Anonymous

    cool illusions!!!

  • Anonymous

    I too agree about the surprise!

  • Anonymous

    Look no hands!!

  • Anonymous

    nice. i like the last one

  • bobo

    i love this kind of illusion. it messes with your mind.

  • Joanna

    I agree – fun illusions but what’s your news?

  • Anonymous

    like thoose :)
    very good :)
    ty a lot :)

  • Anonymous

    The last one’s cool.

  • jinky 1967

    i like these.. now these are optical illusions, tricking the eye and brain.. good stuff

  • yellowmangroup

    it bored me i need something rlly cool

  • Chris

    Sweet stuff,
    and yeah where is that surprise

  • Tin Soldier

    Seems the mac widget is taking me to google reader to add the comments feed to my reader. It used to bring me right to the page for that days illusion.

  • Anonymous

    Is the suprise the “feeling lucky?” bar that’s on the left upper hand corner? By the way, nice illusions.

  • Anonymous

    Huh? Now the “feeling lucky?” bar’s gone.

  • Anonymous

    i don’t see any suprise!
    where is it? =s

  • Anonymous

    Felix – you clearly have no idea what foreshortening means

  • lolz

    no i don’t see it in any pic besides the last two

  • Anonymous

    i dont see it…..???

  • Samantha Hermundson

    the last one is just the same person but its smaller and reversed!!

  • Samantha Hermundson

    and all the other ones the things in the picture are all the same size

  • ilove the little short guys! they’re so short! lol!

  • Me

    Milner and Goodale in 1985 suggested that there is action and perception visual systems. The perception is responsible for what. It is known as the Ventral visual stream using a occipital – temporal pathway. Anyway long story short the ventral system is responsible for object size constancy. So the same sized object perceived in further away seems bigger because we try to maintain an object size constancy notion that would be informative of its dimensions based on size/distance interaction. So the illusion is also in the question. Which object is bigger answer correctly the one further away on realistic terms. Which figure is drawn bigger outside a space continuous doesn’t.

  • Kelly

    This reminds me of the mistaken belief that the sun has different optical sizes as it rises and sets throughout the day. People I explain this to do not believe that the image of the sun is the same exact size at sunset (when it appears large) as it is at its peak midday (appearing smaller). This is because we are interpreting the sun’s size in refrence to earthbound objects (buildings, trees, etc.) at sunset/rise, but do not have such apparent contrasting objects when the sun is at its peak. THE TEST: hold you hand at arms length (extended) and cover the sun’s image at its peak. Not which of you finger just barely covers it. Then, at sunset, when the sun is “big”, do the same. The same finger will cover the sun!

  • mittens

    very cool

  • Brenda Nyawara

    it’s all about perspective and they’ve got it all wrong. but still, very funny HAHAHAH!

  • HippoFest – Download Free Software

    That Illusion Below Up Your Mind :P

  • nice illusion, from big to small

  • sarcasm

    i agree with yellowmangroup. also they are all the same size it is just perspective

  • Really spooky…. could not beleive it at first…

  • Sadie Elmsworth

    i just see photoshopped images

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