False colors as a visual aid

How unnatural coloring helps us to see.
Author
Walter Pfefferle
Published
13/10/2023
Reading time
2 min
Category
Art and science
The human being - a trichromat

We humans can see colors, we are so-called trichromats; this means that in our eyes we have 3 different color cells in the retina that are sensitive to light in the red, green and blue ranges.

This means that we can perceive our environment in color. With all the transitions, as the receptors cover a broad field overall and even small differences in color are worked out through various calculation mechanisms in the brain. This allows us to perceive the rainbow in its full beauty.

This color vision helps us to cope very well with our environment.

We can identify what is edible, we know about warning colors, we can camouflage ourselves, and we can use colors as a means of communication, be it to present ourselves as particularly attractive, to show our status or to understand the mood of others or to convey our own.

Colors evoke emotions

The perception of colors is therefore a broad field; we see that colors serve to receive and send information, and we recognize that emotions are transported or triggered with colors.

Scientists have meticulously proven that different image-color combinations cause different emotions.

Koenderink and colleagues show that certain color combinations can be assigned to specific word clouds.

(Affective Responses to Image Color Combinations; Koenderink et al. 2021, Art and Perception XX (2021) 1-60).

What happens when we consciously use unexpected colors?

Here is an example of a photo of the techno group MSCHKNSM (Gießen street festival):

The original black and white photo shows the expected.

In the false-color photo, the effect of the music is also conveyed; the coloring allows the viewer to feel the fluidity of the music.

A similar sensory experience here with a saxophone player on the banks of the Tiber:

Only the coloring gives an indication of how the atmosphere changed abruptly when he started playing and the world around him was literally set on fire.

The picture "The big promise" offers yet another sensory experience.

The iconographic pictures with their great promise in the respective world are given a dystopian question mark by the false colors:

In this way, the false colors help us to see things in the pictures that we would not have easily noticed in the original ones.