1 / 40

COLOR Perception

COLOR Perception. Sam Francis, Three Colors. An Additive, or Light-based color system, where the three primaries create white. Primaries and Secondaries in a light-based system, where Red, Green, and Blue Make magenta, yellow, and cyan, and finally, white.

heaton
Télécharger la présentation

COLOR Perception

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. COLOR Perception Sam Francis, Three Colors

  2. An Additive, or Light-based color system, where the three primaries create white

  3. Primaries and Secondaries in a light-based system, where Red, Green, and Blue Make magenta, yellow, and cyan, and finally, white.

  4. Traditional, Pigment-based Primaries

  5. Basic Diagram of the human eye

  6. Rods: perceive value only. Allow us to perceive forms (but not colors!) in dim light. Cones: perceive color. Require brighter lighting situation to function. Why we don’t see colors as well at night. This is also why squinting can help to determine what color is lower in value---squinting allows less light to pass through our eyes, limiting the effects of the cones, and our ability to read color. Only rods are working, so we are able to determine value better.

  7. Two theories of how colors are perceived. • Trichromatic theory: states that there are three different kinds of cones, one for red, one for green, and one for blue-violet (this roughly corresponds to the primaries in the additive color system).

  8. We see all colors through variations in the amounts of these cones that are stimulated. For example, when perceiving yellow, the red and green cones are activated • Remember, in the additive color system, red and green mix to create yellow.

  9. Theory two • Opponent theory: according to this theory, colors are discerned through cone pairs of opposing colors. • Pairs of cones will perceive red and green OR Blue-violet and Yellow. • In each pairing, only one color can be seen at a time and the other is inhibited.

  10. After-Images • This theory may explain the phenomena of After-Images, where, if you focus on an area of saturated color for a long time and then move your eyes, you will briefly see the opposite (according the the subtractive color wheel) of that color. • The theory suggests, that when a cone is fatigued from focusing on a strong, dominant color, it’s opposite is no longer suppressed.

  11. AFTER IMAGE: when the signaling mechanism for one color is fatigued, its complimentary is no longer inhibited.

  12. After Image is also known as ‘Successive Contrast’

  13. Abnormal color perception/perception deficiencies

  14. Color-blindness occurs in about 7% of men and .04 % of women

  15. Individuals will lack a type of cone and thus be unable to perceive that color

  16. The Ishihara Color test is a tool used to diagnose color blindness

  17. Synesthesia is a perception abnormality where people respond to the environment by combining senses. Shapes may have taste, sounds color, scents, color as well.These colors are actually perceived in response to sound, smells, etc.

  18. http://www.youtube.com/watch?v=V3B7uQ5K0IU&feature=related

  19. Primary colors in the Process (printing and photo) system

  20. FACTORS INFLUENCING COLOR PERCEPTION: • Amount and quality of lighting on surfaces • Visual health/condition of color blindness • The surface of the object:shiny, matte, textured • The amount of a color • Color relationships: how color is affected by its surroundings

  21. Different temperatures of light will change our perception of colors

  22. Color Constancy • The idea that we tend to perceive colors as unchanging, because of our visual memory of objects. Our brains are able to compensate for color changes that occur due to changing light situations.

  23. LOCAL COLOR:the general color of an object

  24. CLAUDE MONET 3 VIEWS OF ROUEN CATHEDRAL EXAMPLES OF DIFFERING LIGHTING EFFECTS HOW THEY CHANGE COLOR PERCEPTION

  25. Metamerism • The capacity of colors to change under different lighting situations

  26. Simultaneous Contrast • How colors may be effected by color relationships/environment Richard Anuszkiewicz

  27. Josef Albers Homage To the Square

  28. Subtraction Effect: A dominant color may seem to subtract itself from a less dominant color a yellow environment will cause a smaller yellow-orange color to seem more orange because it seems to subtract the yellow from the yellow orange

  29. Complementary Reaction/Effect • A dominant color may seem to make a less dominant color resemble it’s complement. A strong orange environment causes a blue-green square to seem bluer. This is related to the after-image effect where our eyes become fatigued by one color and spontaneously create it’s opposite.

  30. Value Contrast • A strong contrast of value between environment colors will cause smaller areas of color to shift in value. • A middle-value will seem lighter on the dark environment and darker on the light environment.

More Related