This illusion of optics plays with your brain: is the photo black and white or color?

In TN Techno we love optical illusions and this time we bring one that literally plays with our brain, getting it confused.

The next question is the trigger: Is the image you see at the beginning of this review in black and white or in color? At a first inspection, this looks like a colorful picture of a group of students. But when we look closely, we realize that the photo has no colors, but is composed of a gray scale.

How do you get the effect?

The trick is simple, as explained by the creator of this visual experience, a developer of software who is also a digital artist: place a grid that has colors on the original image (in black and white).

"A grid of colors superimposed on a grayscale image gives the cells a colorful look," he explains.

Bart Anderson, Scientist in Vision at the University of Sydney in Australia, declares in statements at the site Scientific alert that the effect is not particularly surprising. "Most of the receptive fields that code color are wide. Then the "average" grids with the achromatic background and then it is attributed to this part of the image ".

This means that our brain usually summarizes the visual information it perceives. When we look at images or scenes, the general view prevails.

The source adds the following images (above), which show that, in its own way, the effect works with dots or stripes In the black and white photo. Also in an animation (the trick does not require static images), as can be seen below.