This Picture Has No Red Pixels—So Why Do The Strawberries Still Look Red? - Motherboard
▻https://motherboard.vice.com/en_us/article/this-picture-has-no-red-pixelsso-why-do-the-strawberries-still-loo
Since all this #color_contamination from light sources isn’t really useful (it would be super confusing if a ripe banana looked yellow in the morning but green at midday, for example), our brains have evolved to color correct. It allows the colors we see to look the same no matter the lighting.
“In this picture, someone has very cleverly manipulated the image so that the objects you’re looking at are reflecting what would otherwise be achromatic or grayscale, but the light source that your brain interprets to be on the scene has got this blueish component,” Conway told me. “You brain says, ’the light source that I’m viewing these strawberries under has some blue component to it, so I’m going to subtract that automatically from every pixel.’ And when you take grey pixels and subtract out this blue bias, you end up with red.”
