Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day -- The Same Color Illusion
NASA ^ | October 07, 2012 | (see photo credit)

Posted on 10/06/2012 9:43:54 PM PDT by SunkenCiv

Explanation: Are square A and B the same color? They are! To verify this, either run your cursor over the image or click here to see them connected. The above illusion, called the same color illusion, illustrates that purely human observations in science may be ambiguous or inaccurate. Even such a seemingly direct perception as relative color. Similar illusions exist on the sky, such as the size of the Moon near the horizon, or the apparent shapes of astronomical objects. The advent of automated, reproducible, measuring devices such as CCDs have made science in general and astronomy in particular less prone to, but not free of, human-biased illusions.

October 07, 2012

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; science
[Credit: Edward H. Adelson, Wikipedia]

1 posted on 10/06/2012 9:44:00 PM PDT by SunkenCiv
[ Post Reply | Private Reply | View Replies]

To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

2 posted on 10/06/2012 9:47:05 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | View Replies]

To: SunkenCiv

Maybe it’s my monitor, but B is lighter even when the squares are connected.


3 posted on 10/06/2012 9:47:48 PM PDT by bimboeruption (Clinging to my Bible and my HK.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: bimboeruption

my monitor too....even when i go to the web site...there is a subtleshade difference.


4 posted on 10/06/2012 9:54:39 PM PDT by mdmathis6 (We have grieved the Holy Spirit, with our Dark hearts and dark minds turned against God!)
[ Post Reply | Private Reply | To 3 | View Replies]

To: bimboeruption
Or maybe it's your eyes. I saw the same thing as you but ran a program called WhatColor (http://www.hikarun.com/e/) and all the pixels in question have a RGB of 120,120,120. It's a nice solid gray.
5 posted on 10/06/2012 10:07:20 PM PDT by KarlInOhio (Big Bird is a brood parasite: laid in our nest 43 years ago and we are still feeding him.)
[ Post Reply | Private Reply | To 3 | View Replies]

To: bimboeruption

Photoshop says they are the same.
R 120
G 120
B 120


6 posted on 10/06/2012 10:07:26 PM PDT by MestaMachine (obama kills and none dare call it treason.)
[ Post Reply | Private Reply | To 3 | View Replies]

To: KarlInOhio

Dang. Beat me by 6 seconds,


7 posted on 10/06/2012 10:09:38 PM PDT by MestaMachine (obama kills and none dare call it treason.)
[ Post Reply | Private Reply | To 5 | View Replies]

To: SunkenCiv
My first thought looking at the connected picture was bull!!!!
Then I put my finger and covered the *Connection*.
Amazing!!
Really freaky when you run your finger across the top square to the bottom square and then in the opposite direction.
8 posted on 10/06/2012 10:09:44 PM PDT by The Cajun (Sarah Palin, Mark Levin......Nuff said.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: mdmathis6; bimboeruption

That’s because you are both color-blind.

; )


9 posted on 10/06/2012 10:17:02 PM PDT by UCANSEE2 ( If you think I'm crazy, just wait until you talk to my invisible friend.)
[ Post Reply | Private Reply | To 4 | View Replies]

To: MestaMachine
All you need is MS Paint. Here I copied a section which still maintains the illusion, then blotted out most of it leaving patches of A and B, which now appear identically.


10 posted on 10/06/2012 11:18:16 PM PDT by dr_lew
[ Post Reply | Private Reply | To 6 | View Replies]

To: dr_lew

Sometimes it surprises me how so many people don’t realize what a neat program Paint is. I use it fairly often.

For this though, I was just wanting the RGB values.


11 posted on 10/06/2012 11:29:39 PM PDT by MestaMachine (obama kills and none dare call it treason.)
[ Post Reply | Private Reply | To 10 | View Replies]

To: SunkenCiv
I think what we're actually talking about here is contrast and not colour as both blocks are bordered by sharply contrasting blocks. The surrounding blocks of A and B provide the same level of contrast but at opposite ends of the scale.
12 posted on 10/07/2012 1:03:09 AM PDT by count-your-change (You don't have to be brilliant, not being stupid is enough.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

The Same Color Illusion Image Credit: Edward H. Adelson, Wikipedia


13 posted on 10/07/2012 5:03:44 AM PDT by Las Vegas Dave (".....All 57 states (or is it 58?) must stand together and defeat O'bozo!.....")
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

There's an island cleverly hidden here.

14 posted on 10/07/2012 6:26:43 AM PDT by martin_fierro (< |:)~)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Las Vegas Dave

That chessboard is TOO SMALL! drives me crazy eyetellya...


15 posted on 10/07/2012 6:30:36 AM PDT by BlueDragon (going to change my name to "Nobody" then run for elective office)
[ Post Reply | Private Reply | To 13 | View Replies]

To: MestaMachine
I believe Paint was developed by a company called Z-Soft.

Microsoft bought the company and claimed credit by calling it MS-Paint.

16 posted on 10/07/2012 7:21:08 AM PDT by eCSMaster (Indep. Payment Advisory Board = "Death Panels")
[ Post Reply | Private Reply | To 11 | View Replies]

To: SunkenCiv

What’s with the yellow can on the board?


17 posted on 10/07/2012 8:27:32 AM PDT by blueunicorn6 ("A crack shot and a good dancer")
[ Post Reply | Private Reply | To 1 | View Replies]

To: eCSMaster

I just call it Paint. It’s a very versatile program and I use it quite often.


18 posted on 10/07/2012 8:51:51 AM PDT by MestaMachine (obama kills and none dare call it treason.)
[ Post Reply | Private Reply | To 16 | View Replies]

To: bimboeruption

See http://www.youtube.com/watch?v=rQJEzz-XdlA for a better illustration of this illusion. I agree this particular image is unconvincing on most monitors.


19 posted on 10/07/2012 10:48:52 AM PDT by AustinBill (consequence is what makes our choices real)
[ Post Reply | Private Reply | To 3 | View Replies]

To: SunkenCiv

When I cover everything up around the squares and only leave a triangle of each showing, without the letters, they do not look like the same shade.


20 posted on 10/07/2012 7:06:14 PM PDT by Bellflower (The LORD is Holy, separated from all sin, perfect, righteous, high and lifted up.)
[ Post Reply | Private Reply | To 1 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson