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Author Topic: Optical Illusion.  (Read 1610 times)
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Tweakie.CNC
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« on: November 03, 2017, 01:44:19 AM »

There are countless optical illusions but I think this is one of the best.

The squares A and B are exactly the same shade of grey.

(I did actually have to copy and paste the image into Paint and use the colour picker in order to draw a line through the two squares just to prove it to myself)

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« Last Edit: November 03, 2017, 07:09:22 AM by Tweakie.CNC » Logged

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Tweakie.CNC
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« Reply #1 on: November 03, 2017, 07:16:13 AM »

This video demonstrate the principle;  https://youtu.be/z9Sen1HTu5o

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Chaoticone
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« Reply #2 on: November 03, 2017, 04:09:58 PM »

 Huh   Shocked   Cool

Good one Tweakie! That's right up there with the beer goggles effect.
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Grin If you could see the things I have in my head, you would be laughing too. Grin
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Tweakie.CNC
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« Reply #3 on: November 04, 2017, 03:27:16 AM »

Ahhh, the Beer Goggles   Grin

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Tweakie.CNC
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« Reply #4 on: November 15, 2017, 06:35:44 AM »

Interesting that the illusion can be reproduced by laser etching.

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Chaoticone
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« Reply #5 on: November 15, 2017, 10:59:51 PM »

Nice Tweakie!
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Tweakie.CNC
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« Reply #6 on: November 24, 2017, 04:41:11 AM »

By way of proof, a good friend of mine in Hungary sent me this picture. He has copied a section of the A square and pasted it by the B square and done a similar thing with the B and A squares to prove that my laser etched shades of the two squares are indeed the same.

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* 6839875.jpg (42.38 KB, 640x477 - viewed 79 times.)
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« Reply #7 on: November 24, 2017, 06:19:02 AM »

That's great Tweakie! What did you use to generate the Gcode for the laser? Did he actually do the laser etching too?  If so, is he running your Gcode or generating his own?
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Tweakie.CNC
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« Reply #8 on: November 24, 2017, 06:53:46 AM »

My Hungarian friend just copied my posted picture and then used Photoshop (or similar) to do the copy and paste. He did say that he could not believe his eyes so all credit must go to E.H.Adelson for creating such an excellent and reproducible optical illusion.

(I have to admit to being a bit dis-loyal but the Gcode was generated and the image laser produced using the Auggie / 57CNC Tempest planner and motion controller).
 
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« Last Edit: November 26, 2017, 07:07:47 AM by Tweakie.CNC » Logged

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« Reply #9 on: January 05, 2018, 07:18:30 PM »

Very nice Tweakie, that is a good one.
I tore two small holes in a piece of paper and laid it over the screen .... dead nuts, identical.
Really cool !
(too blurred to recognize through my beer goggles)
Thanks,
Russ

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