Chapter 7: Perceiving Color, Study notes of Psychology

Chapter 7: Perceiving Color. -The physical dimensions of color. -The psychological dimensions of color appearance. (hue, saturation, brightness).

Typology: Study notes

2022/2023

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Chapter 7: Perceiving Color
-The physical dimensions of color
-The psychological dimensions of color appearance
(hue, saturation, brightness)
-The relationship between the psychological and physical dimensions of color
(Trichromacy Color opponency)
- Other influences on color perception
(color constancy, top-down effects)
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Chapter 7: Perceiving Color

-The physical dimensions of color-The psychological dimensions of color appearance

(hue, saturation, brightness) -The relationship between the psychological and physical dimensions of color

(Trichromacy Color opponency)

  • Other influences on color perception

(color constancy, top-down effects)

Sir Isaac Newton

White light is composed of multiple colors

Monochromatic lightHeterochromatic light

Spectral composition of two common (heterochromatic) illuminants

Reflectance of some common surfaces and pigments

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Surface reflectance of some common objects

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Consider a ripe orange illuminated with a brightmonochromatic blue (420 nm) light. What color will thebanana appear to be?a.^

bright orange

b.^

dark/dim orange

c.^

black

d.^

dark/dim blue

Wavelength

Relative amount of light

Blue (monochromatic)

Spectral composition of light entering the eye afterbeing reflected from a surface =

X

Spectral composition of theilluminant

Reflectance of the surface

Wavelength

Relative amount of light

White light

Blue(monochromatic)

Orange(monochromatic)

Color

-^

Physical dimensions of color

Spectral compositionlight source X reflectance

-^

Psychological dimensions of color

1. Hue (e.g., red, blue, green)2. Saturation (e.g., pastel, ‘deep & rich’)3. Brightness (e.g., dim, bright)

Newton, 1703

Newton noticed that the color spectrum could be represented in a circle.

Psychological dimensions of color

2. saturation

Psychological dimensions of color

3. brightness

Psychological dimensions of color