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Very cool Dingo. I love this sort of stuff.

OK, I had to pull the image into Photoshop to prove it to myself. The four squares around the B square are all darker and therefore make the B square look lighter than it really is. A good example of how the human eye perceives light.

Stuart

OT - Okay Stuart; your number plates outrank mine. Note to self - don't post near Stuart's avatar....

Now that is cool.

I found that once you pointed out they were the same colour, if I sort of looked in between the two of them but not directly at either of them I could see that you were right.

Simon - no more camel?

Manta wrote:OT - Okay Stuart; your number plates outrank mine. Note to self - don't post near Stuart's avatar....

I could have all of the cameras in the world, but I still don't have the outstanding member of the year! Only you have that.........

Stuart

LostDingo, I'm amazed! How fascinating this is. I did have to check with PS as you knew most of us would. There's no lie.

a quicker way to view is simply hold your hand next to the line in pic 2, the line is the same color when not viewing dark/light squares in the surrounds

O course everyone will still view in PS just to confirm the colors

I can see it in pic 2, with the line. But I checked anyway, I just wanted to see the numbers for myself.

damn,
at first glance this is hard to believe.

but like the others, I have tested it and stand amazed.

steve

I'm not going to test it - don't really know how.
I will take it from previous comments that it is correct - clever trickery.

The question is why is the brain deceived, and what are the practical applications for photography.

Given that we already live in the age where the visual image can be so easily manipulated anyway - how can this visual illusion be replicated in an ORIGINAL capture/image??

It does work if you squint severely...

I've seen this before, its kind of perception which our brain interprets images, not only lights. We tend to 'assume' that shadow is darker than lighten areas and so we see it 'different'



Pulled the two blocks out and sure its same thing...

I have tested this illusion and the square are the same tone. Damned powerful illusion though.

Illusion or not, keeps you scratching your head for a while...

Cool stuff, love this kinda thing... brain teasers.

Anyone got anymore

smac wrote:

Manta wrote:OT - Okay Stuart; your number plates outrank mine. Note to self - don't post near Stuart's avatar....

I could have all of the cameras in the world, but I still don't have the outstanding member of the year! Only you have that.........

Stuart

True... but only until the Christmas meeting then I can slip back into obscurity and not be so 'outstanding'.

macka wrote:Simon - no more camel?

Like most of my hobbies Macka - I got bored with it! Life's too short. This one will probably only last a few weeks..

Sorry to hijack the thread...

I'd rather have these more "scientifically incorrect" eyes.

Here is another.........no its not a jump out and scare you thing.

Read the instructions up the top first.

http://www.johnsadowski.com/big_spanish_castle.html

That's pretty cool - the old complimentary colours trick.

Thanks Jamie.

Dingo - brilliant - and yes, I opened it in photoshop, and even cut and pasted squares to check they were the same
The mind is a bloody powerful thing huh !!!!
Hugs
Rel

We did some of this stuff when I was studying psych at Uni and it still blows me away how easily the mind is fooled.

Ant.

An important exercise for all camera users (Its easier with digital though)

Get a totally black object a flat black piece of paper does well

and a similar white object flat white paper works here too.

Just using your auto metering settings photograph both objects and compare the unaltered images.

both should turn out to be very close to 18% grey but still do the exercise just so you confirm that your camera does not see the world as we do it only sees things in terms of 18% grey.

the same applies to raw images in photoshop there is no colour in the image untill they are filtered and combined using a computerized system. All the camera and computer see is shades of grey.

Jamie wrote:Here is another...

Interesting, seems to work best on low-contrast images with muted colour. Now I'll have to play with that...

Here's something else to try next tiime you're out and about:

Gaze at a waterfall that has a lot of whitewater waterflow (or anything that shows fills your field-of-view with a lot of movement in a single direction) for 10-15 seconds.
Then look at something you know to be stationary and watch it travel in the opposite direction for a few secs.

cheers

Keith