3.3.3. AXIOMS ​​OF FLOWER EQUALIZATION

Experiments on the equalization of colors (both additive and subtractive) were carried out with great accuracy by many researchers. It has been established that complete equalization is sometimes not achieved with very low or very strong light. The adjustment results depend to some extent on the color environment. Nevertheless, it turned out that simple color adjustment rules remain valid in a wide range of experimental conditions.

Grassman [15] introduced eight axioms defining the three-color equalization of colors that are the basis of colorimetry:

1. Any color can be equalized with a mixture of no more than three colors.

2. The equalization achieved at a given light intensity is maintained over a wide range of intensities.

3. A mixture of colors cannot be divided into individual components by the human eye.

4. The brightness of the color mixture is equal to the sum of the brightness of its components.

5. The law of addition. If color equivalent to color and color - color then a mix of colors and equivalent mixture and :

. (3.3.4)

6. The law of subtraction. If a mixture of colors and equivalent mixture and and if color equivalent to color then color equivalent to color :

, . (3.3.5)

7. The law of transitivity. If color equivalent to color and color - color then is equivalent to :

, . (3.3.6)

8. Leveling colors. Rightly one of three ratios:

but) color units equalize the mixture units , units and units :

; (3.3.7)

b) mixture units and units equalizes the mixture units and units :

; (3.3.8)

c) mixture units , units and units equalizes color units :

. (3.3.9)