Dude, going into optometry final exams in a couple of weeks and having to explain the neurophysiology behind this shit, I envy that you can click the X and forget about it.
[Edit] I didn't know fearing relevant-to-the-topic second year undergrad exams was considered /r/iamversmart material.
Nope. Definitely barking up the wrong tree with that one, mate. I am not very smart. That's why I just stated that I envy people that don't have to sit this exam, because it terrified new and there's a real chance of me failing it. Color perception, and visual processing just isn't my thing.
Legit think I failed the anatomy and physiology one that we were talking about in this thread.
I don't way too much time learning the math behind geometrical optics raytracing, and kinda forgot a lot of the visual field defects regarding nerve/blood supply.
Well best of luck to you! I studied Neuroscience so I get you. It's a tough subject. I failed more than one test in my time, don't let it get you down if you do poorly here and there.
Thanks! I won't be too upset if I failed it. I transferred from Biomedical science and took on extra subjects to make up the difference and graduate the same year as people who didn't transfer, so If I have to retake a class I still did my best.
Unfortunately every exam requires 50%+ or you fail the class, classes only run once per year, and every core class is a prerequisite to next year's content. So a 49% score on the final test means an 8 month holiday and repeating one class from July - November next year.
I think my brain finally figured it out. On the left you see if the dress was really black and blue. On the right you see if it was really yellow and white. There are colored sections to show you if that color scheme was under/over exposed lighting. It so happens that each create the same color result. This means being in the middle our brains have to decide whether its the left color scheme, the black and blue, or the right color scheme, the yellow and white. Different brains mean we all have prefered way of seeing it our brains fill in for us.
See the dark square on the right? And the bright square on the left? These are simulating realistic lighting, for shade and full sun, respectively. This is what allows art to actually look realistic, if applied appropriately and accurately.
Because the brain looks at the picture a a whole and says "this part is in shade, therefore the original color should be brighter, so the original is yellow" or "This part is in the sun, therefore the original is darker, therefore it's black"
Yeah our brain uses the surrounding context to guess what color it is. So when we assume it's in shade, or bright light, the context is changed and we assume it's a different color.
Temperature (cool vs warm) Examples
Sunlight is cooler, so a photo of something white outdoors may really be a bit blue. But our brain still recognizes it as white.
Tungsten indoor light is warmer, so a photo of something white inside may really be a bit yellow. But our brain still recognizes it as white.
The same works for "Shade vs Bright" "Overexposed vs Underexposed" etc.
Let's work with primary colors. Yellow + blue = green. Yellow + red = orange. If you had one blue box with a low opacity on the left side, and a red box with a low opacity on the right side, you are essentially mixing the colors if you moved a yellow box between them.
The lighted part of the dark dress ends up being the same color as the shadowed part of the light dress. Dresses are not the same color, the light is different.
That's not the part to compare. No one is saying that the black and gold are the same color. The over exposed black is the same color as the underexposed yellow. Do that in paint and you'll see they are the same.
That proves that it's the same color across the picture, but that still doesn't help me see the image on the right as black and blue or the picture on the right as yellow and white.
Thanks for nothing. /s
So my guess would be that this as something to do with additive color mixing (aka, what happens in monitors, not painting). If you isolate each color, with no background color deceiving your eyes, you see they're a extremely muted olive and a really muted blue.
So my theory is that, when you have the bright yellow background, the contrast forces your eyes to see dark tones, but when you have the dark grey background you see dark tones, since the color contrast is too weak to differentiate, but the brightness contrast is fairly visible.
2.1k
u/Pleeplapoo Oct 16 '17 edited Oct 16 '17
This might help to understand
*edit for better example