Introduction: Optical Illusion: Create One With Any Color Photo

This instructable will show you how to take negative afterimages to another level. By introducing a negative color photo and then immediately incorporating a black and white version of the same photo, you will perceive the black and white photo in full color (the way the color photo was meant to look). This can be done with any color photo!

If you've ever seen negative afterimage optical illusions, you know that they can be baffling and sometimes quite spectacular. They often involve staring at a negative image for 10-20 seconds and then looking at a blank space. The usual result is seeing what some call a "ghost image" of the negative image, yet it is seen as a positive image (i.e. the way it is supposed to look). These are a well understood retinal phenomenon.

This is a very simple project, yet it is extremely effective. The way that our eyes and brain perceive and interpret images allow for us to trick ourselves in this case. After viewing this over and over, the same effect happens each time. It can be frustrating in terms of trying to figure out why this illusion happens. Ultimately, it is my hope that you will find this helpful, intriguing, and boat-loads of fun!!

Here is a video of the completed project which shows the optical illusion in its entirety:



Step 1: What You Need

You will need:

1] A color photo file
2] Photo editing software that allows you to:
a) "invert colors" or create a "negative image" (almost all programs out there, including Paint, have this feature)
b) make a black and white version of the photo
3] Video editing software (this is optional but very helpful in yielding the best results)

Step 2: Choosing a Photo

I highly recommend using a photo that has rich colors and a lot of contrast. This will stimulate your eyes more and ultimately enhance the effect of the optical illusion.

Step 3: Creating a Negative Image

Import your chosen photo into a photo editing program. Then simply choose the "invert" (or "negative") editing option. This should convert the whole photo into a negative image. Then save it. Make sure that you keep the original color photo that you imported, if you want it. For instance, I used Photoshop and saved the inverted photo as a copy. I still retained the original photo.

Now, just like that, you have created the first part of the illusion.
Let's move on.....

Step 4: Creating a Black and White Image

Now that you have a negative color photo, it's time to create a black and white version of the original color photo. To do this, import the original color image into your editing program again. This time, just create a black and white version. Again, save it as a copy if you don't want to lose your original color picture file.

Step 5: Optional Focal Point

You probably noticed a dot near the center of the photos. This just provides a focal point that you can stare at in order for the full effect of the illusion to work.

It is not entirely necessary. Without it, you can just choose a point near the center of the photo to stare at. The important part is to stay "zoned in" on one spot near the middle of the picture.

If you decide to add a dot in your photos, use a drawing tool in your software to make a small white circle (see picture). Obviously when you invert the original color photo, this dot will be black. That's what you want.

Step 6: Bringing It All Together

Now you have all of the photos that you need. Here is exactly what you want to do:

1) Stare at the focal point of the inverted/negative color image for about 15 seconds.
2) Have the black and white photo appear, seamlessly, immediately after that 15 seconds.
3) Continue to stare at the focal point after this transition. You will see the black and white photo in color (unless you are colorblind)!
4) Keep your eyes on the photo, but switch your view to another part of the picture. Stunningly, you will see that it is black and white.

A video editing program is really helpful to use with this illusion. Just import all of the pictures into the editing program, except for the original color image. Drag the inverted/negative photo onto the timeline first and stretch it out so that it plays for about 15 seconds. Then drag the black and white version of the original photo onto the timeline and place it right next to that. Dont' get fancy and use any transition effects in between here. Just let it switch to black and white instantly. The amount of time that you keep the black and white photo playing is up to you, but I let it go for about 10-15 seconds or so.

Again, here is the full effect of the illusion in living color (or at least it appears to be):


Comments

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Eliza_moon123star made it!(author)2016-06-22

hi my name is Eliza moon and I'm starting this optical illusion

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ShotaB made it!(author)2015-09-14

Hello. Please, I need help. Can someone make for me optical illusion and send it to me on e-mail? I want same optical illusion from second photo (Budha) for angel (but no colour changes) !. Please someone can make it? my e-mail is. b.shota.b@gmail.com

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JulianQ made it!(author)2015-01-26

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killerdynamo made it!(author)2011-01-06

These illusions never work for me. I blame the colorblindness

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Puzzledd made it!(author)2010-11-20

This is a fabulous trick- so easy (I don't have Paintshop, but just used Microsoft Picture Manager, and set colour saturation to 0 to get the greyscale image- took a couple of seconds). I used a colourful picture of birds- great purple after-image!

Thanks for this 'ible- and a really good explanation, too :)

I'm off to find some more colourful pictures to use!

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Puzzledd made it!(author)2010-11-21

Um, actually that should be -100 for the Hue setting. I also raised the midtones a bit in the B&W version if it was a bit dark.

This picture has the best results of those I tried. You just focus on the dot on the peacock's tail near the centre. The colour effect is quite dramatic.

peacock at Melbourne Zoo 1  .jpgpeacock at Melbourne Zoo 2  .jpg
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greeenpro made it!(author)2010-11-21

I'm glad to see that you experimented with this and are excited about it. That's really cool!! Caution: this process can be addictive...hahaha. Thanks for your comments.

I was checking out your featured ible about the 40 something uses for old CD's. That was a GREAT ible. I subscribed :)

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Puzzledd made it!(author)2010-11-22

Hmmm... I love taking photos, now that they're digital, and virtually free- and I do like finding different things to do with all those photos sitting in my computer... I have a few fun things already, maybe I should do a guide or an Instructable on them...

Too many ideas, too few hours in the day:P

Oh well, one day...

Thanks for your comment and for subscribing, I do hope to do some more soon!

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greeenpro made it!(author)2010-11-22

"Too many ideas, too few hours in the day:P"

So, so true. I'm stil waiting for a time manipulation instructable. Anyone? Please?

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Puzzledd made it!(author)2010-11-24

:D

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peacemaker5000 made it!(author)2010-03-20

cool i had to watch the video again and not look at the dot just to see if you faded in to black and wight 

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eulaliaaaa%21 made it!(author)2009-10-29

If you look at it after it changes you can see that the image Is black and white.

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eulaliaaaa%21 made it!(author)2009-10-29

WOAH!  THAT IS NEAT!

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Caspar made it!(author)2009-10-15

It's not really an illusion, it just looks like one.   ;-)

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Lance+Mt. made it!(author)2009-08-29

What would happen if you used 2 different but very similar.

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greeenpro made it!(author)2009-08-29

Good question! To my knowledge they would have to be almost identical if they were different. The reason being that, in a sense, the negative image is retained by your brain as you stare at it for 10-20 seconds. The illusion occurs when the same picture is then suddenly presented in black and white. The details or objects in both pictures need to be the same or, again, almost identical for the effect to work. I would like to try it with very similar pictures, but I think it would be a waste of time. I don't think it would work. If you happen to try it, please post a response here with your results.

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Lance+Mt. made it!(author)2009-08-29

I am trying as wqe speak. So far i've done one which almost worked. The picture showed up which coloured the face in oddly which was what i was going for, however it was not very effective on the dark image

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greeenpro made it!(author)2009-08-29

Ok. That's what I was afraid of. If I understand you correctly, it doesn't really work when you switch to a different black and white picture.

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Lance+Mt. made it!(author)2009-09-22

It works on the light sections and not as effectively as the dark sections. When i switched back i had bright explsoions and grey dirt. However it works, most pictures work. Cheers

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greeenpro made it!(author)2009-09-22

Thanks for the reply. Your research is very interesting. I'm off to try it right now! Thanks again. Cheers

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Infinitevortex made it!(author)2009-08-29

Fantastic video! I didn't realize I was looking at the B&W; image unll I looked away. Perhaps you could modify it for the "Teach Me Fast Video Contest"

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greeenpro made it!(author)2009-08-29

I thought about that. It would take a minor miracle to pull off a thorough 30 second video on how to do this (actually you are only alotted 28 seconds because of the Forbes.com logo that has to be displayed for 2 secs.). To explain how to do it and present the illusion would take too long since you need to stare at the negative image so long. Thanks for your comment/compliment!!

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husker made it!(author)2009-08-29

You could just tell them to pause it for 15 seconds and then press play. then the photo would only take up about 3 seconds

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greeenpro made it!(author)2009-08-29

hmmm... *stroking non-existent beard in thought*

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supersith22 made it!(author)2009-08-26

very cool. If you look at the color one and go to the black and white, you can see the inverted colors.

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greeenpro made it!(author)2009-08-29

That works!

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jgeekw made it!(author)2009-08-27

yes, rendering your picture in a negative form works, but not as well as taking the hue out of the image. I don't know if your editing software does it, but I have Photoshop and it works much better by adjusting the Hue/Saturation (Image>Adjustments>Hue/Saturation) Hue slider so it has a Hue value of -180. I will post an ible for this method.

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greeenpro made it!(author)2009-08-27

Very interesting...I look forward to seeing the results via your ible. I used Photoshop CS3, but didn't want to alter the hue. Thanks!

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jgeekw made it!(author)2009-08-27

just got done with it. check it out and comment!

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LUCCHINA made it!(author)2009-08-27

WOW!!!!

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gorillailla202 made it!(author)2009-08-26

AAAAHHHHH MY EYES! Dude, that hurt my brain lol

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greeenpro made it!(author)2009-08-26

Try this quick little one. It might mess with your eyes and brain too:) :

https://www.instructables.com/id/30-Second-Optical-Illusion-Solid-Through-a-Solid/

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gorillailla202 made it!(author)2009-08-27

Haha that was a cool one, but still, that color one of yours was way better.

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Lettucehead made it!(author)2009-08-26

Nopes. won't work

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greeenpro made it!(author)2009-08-26

That's weird. I wonder why. I'm sorry to hear that, but thanks for checking it out.

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bobby+sissom made it!(author)2009-08-26

at last with this knowledge at my finger tips i can rule the world muuwaahaha

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greeenpro made it!(author)2009-08-26

Hahahaa...I don't know you, but for some reason that's scary :)

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spookee made it!(author)2009-08-26

Tight 'ible there man! Something I tried just for s & g is using a different focal point in the image (the fish, for example), then shifting my focus to the actual focal point. For me, that gave a nice smooth transition from the color to the black and white. Anyone else try that?

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greeenpro made it!(author)2009-08-26

I just tried it and it was nice and smooth. I love learning from these comments. It's cool to see what other people pick up in your work (unless it's something negative..haha). Thanks a lot!

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Sandisk1duo made it!(author)2009-08-26

Cool! i'll have to try that sometime!

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Stephen+D.+Alverez made it!(author)2009-08-24

I have never been able to get them to work... ... hrmph

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greeenpro made it!(author)2009-08-24

Try this method. Have you tried pics with vibrant colors and high contrast? You aren't colorblind, are you? Seriously...that would render this ible useless of course.

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Stephen+D.+Alverez made it!(author)2009-08-24

Hmmmmmmmmm... ive never been tested for colorblindness, probably should. THANKS

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greeenpro made it!(author)2009-08-25

You do know that there's an orange suit jacket and a purple tie pictured in your avatar, right? :) ahahaaa

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mg0930mg made it!(author)2009-08-25

I'm colorblind...and it works....

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Javin007 made it!(author)2009-08-25

Wow, now that's an interesting concept. I wonder if you were to find someone say red/brown colorblind, and use the inverted colors in a method like this, if the visual memory would allow them to actually "see" the colors they otherwise can't? Very interesting indeed. I'll have to try this with a colorblind friend of mine.

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greeenpro made it!(author)2009-08-26

Please post a comment letting us know if the test works with your friend.

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Javin007 made it!(author)2009-08-26

Will do, if I can track him down. He's kind of a nomad.

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Javin007 made it!(author)2009-08-26

Errr... Red/Green.

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mg0930mg made it!(author)2009-08-25

I'm red/green. :)

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