how do you do this? hidden picture

warning: material may offend some:

http://home.pacbell.net/mnk4ever/pics/hiddenpicture.jpg

press control + A when you see the image. How do you do this? i suspect it has something to do with channel manipulation? im really interested ! thanks

I have never seen something like that before. But I do see the image of her behind the flowers.

I am going to check that out and try to get back to you on it.

That was pretty cool for a jpg.

Ok, well i copied that image to my computer and opened it in Photoshop. After fooling around for a bit I clicked on Channels, and guess what I found. THe hidden image.

The Blue channel is where the other image is stored.

I can't figure out however how to create it, but now that you know it has to do with the Channels, maybe someone else can figure out the rest.

I think you off-blend it in the background to get this effect. That might not get the exact effect, but close to it.

I've had a bit of a play, and managed to get the general idea for hidding the image. I've included my experiment, it's a bit of a quick and dirty job, but I don't want to waste too much time.
Basically the idea is you have two images, the cover image and the hidden image. First you remove every second pixel in the cover image, the underlying image you also remove every second pixel, however offset by one, so it shows through. To really hide it then you select the inverse of this on the hidden image and fill all the red and blue channels with black, this leaves the blue channel untouched.

www.benjaminranck.com/hiddenEye.jpg

So what happens is when you select an image (in windows) it uses a blue mask on every second pixel (kind of halftone effect) this wipes out the top image (because you only have everysecond pixel in it) and reveals the hidden image.

I know that was a bit long and complicated, but hopefully you get the idea. The whole thing works because of the way an image is selected in windows IE, that is a 1 pixel halftone blue mask.

Cheers,
Benjamin

Hey, good job Whitelines, that works perfectly.

just fyi, that doesn't work in firebird, i had to load ie to see it, pretty neat tho =)

Yeah, the reason it works is specifically due to the way IE selects pictures.

great whitelines, though is it possible to explain it through images? I am a noob at photoshop.

Did anyone happen to save this picture. Because the link doesnt work anymore, and I was trying to show it to a friend. If anyone has it Id really appreciate it if you could post it here or email it to me.
I thought I saved it, but apparently not

squigglestarsquiggle@hotmail.com