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Tuesday, June 13, 2006

Colour Illusion

I saw a link to and intriguing optical illusion on Siobhan's blog, and decided to try to reproduce the affect myself.

Hover your mouse over the image and stare at the black dot in the middle, move your mouse away without moving your eyes. The black and white picture will appear in colour, until you move your eyes.



Clever huh? I could explain how it works, but that would be rather boring. What was slightly annoying was, after I'd worked out how to do it all by myself, I then found the tutorial. :-)

Also Jessica tells me she's trying to do an automated version that works with pictures from Flickr, so watch out for that!

Labels:

Siobhan Curran  Not working for me Bex - I think you haven't got the MMi_swapImage() and MMi_swapImageRestore() scripts on this page anywhere 
Becky  Thanks Siobhan, I spotted it. :-)

It didn't help that I made a minor edit to my blogger template to put the scripts you mentioned in the header, except that blogger had the clever idea of not loading my entire template when I edited it, so when I save the changes it cut off the last 1/3rd...

So that necessitated going to find a backup of my template... which was on another machine.

Fun fun fun! 
Jessica  Trying to reverse engineer the photoshop filters is giving me a headache :-/ I've got the formula for calculating luminosity but it just doesn't come out right. I'm getting there though :) 
Becky T  Whoo, that's even cooler than the Whirlytron 2000. Nice picture of you too, Bex! 
Michelle Faith  that is really cool , it's also a great picture too. What that with your canon 
metrogeekboy  truly amazing darling! 
Daniela  COOL! I've seen this and it's easy to do in Photoshop. Jessica, you've to generate two images. The first one is a plain grayscale, made with "Image/Adjust/Desaturate". For the other, fill your color original with 50% gray in Luminosity mode and invert. Voilà! 
Jessica  I know daniela, but i was trying to do an automated version to work as a flickr toy, I can't do that with photoshop. Anyway, I gave up! I got it pretty close but it didn't look quite right and the colours didn't come out very vivid.

I might go back to it sometime 

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