If we do an algorithm for distributing attention over an image , then it should be done according to the mind, which means that it becomes vitally important to determine the “strength of color”.

Color perception

The sense of color depends on the signal sent to the brain from the S, M and L cones. At the same time, some colors, determined by a person, feel several types of cones at once, and it is because of this that some colors seem brighter than others, of the same hue and saturation.

I wonder what the colors would look like if the strength of their perception were the same as the saturation? To answer this question, I wrote a program that illustrates the relationship between color and perception. And here are the results of her work: Color target: original , post-processing . Another color target: original , post-processing . But the above images show the result only for full color vision. I wonder how color blind people look at the world?

Color blindness

And color blind people are different: color blindness occurs mainly due to a lack of a certain type of cones. In the case of a shortage of two types of cones, the colors do not differ at all, the world looks monochromatic, as in a black and white photograph. But in the case of a shortage of cones of one of the types S, M or L, a situation of indistinguishability of some colors arises. Let’s try to simulate, based on the color sensitivity data of the cones, the perception of color blind people! To be honest, these models are not calibrated. Ideally, a color blind person should not perceive a significant difference between the original and the result of the simulation. But in order to imagine how – curious? 🙂

In my opinion, people with indistinguishability of blue shades have the easiest place in everyday life. Much more difficult for non-discriminating red. Traffic lights, road signs, warnings are often invisible.