talkmagic.co.uk

The Magic Attic wrote:Squint at the picture will reveal it too
great picture!

Darren @ The Magic Attic

She still had a mustache.

Ian the Magic-Ian wrote:She still had a mustache.

Definitely the NatWest cashier ......

cragglecat wrote:That's bizzare but great! How on earth does it actually work?!

It's all based on how the brain puts images together.

At a distance, or squinting, you can't see fine detail, so you are forced to rely on blocks of shading. When you're close enough to make out sharp detail like lines, these take precedence in the brain. You're still seeing the shading, but ignoring it where it conflicts with the "edge" lines.

The same sort of thing happens in poor vision conditions (low light, or minus glasses), where a shadow can look like a solid object even if it falls across several surfaces. Improve conditions (e.g. put your glasses on) and edges take precedence over shadows.

Presumably this is why it evolved -- so we can make out objects even under various patterns of light and shade.

Am I being thick? it looks the same no matter what I do? what am I doin wrong?

ahhh i GOT IT!!!