cesia intro

CESIA (introduction) JosĂŠ Luis CAIVANO caivano@fadu.uba.ar

University of Buenos Aires and National Council for Research Argentine Color Group

MODES OF APPEARANCE OF COLOR (Optical Society of America)

Atributes 1. Lightness 2. Hue 3. Saturation

COLOR

4. Size 5. Shape 6. Location

spatial aspects: FORM

7. Flicker 8. Sparkle

temporal variations of light

9. Transparency 10. Glossiness 11. Luster

CESIA

Maitland Graves

Arthur Pope

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3 spatial factors position size shape

line direction shape size texture value color

3 tonal factors value hue intensity

Bruno Munari

Other authors

visual support 1. texture 2. shape 3. structure 4. module 5. motion [多and color?

2 inclusive categories

Sven Hesselgren

Our classification

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form color light texture

form color

spatial form visual texture color cesia motion

colors

spatial forms

textures

cesias

Three types of objects in the world:

emisive

reflective

transmissive

Reflective and transmissive objects are two forms of absorbent objects.

The stimulus for color can be produced by primary sources (objects that emit light) or by secondary sources (objects that reflect or transmit the light coming from another source).

secondary sources

primary sources

From the physical point of view, an object may absorb light, and the non-absorbed portion can be either reflected by the material, or transmitted trough it.

Both reflection and transmission may occur regularly (specularly) or diffusely.

diffuse reflection (matte)

absorption (dark or black) diffuse transmission (traslucent)

regular reflection (mirrorlike) regular transmission (transparent)

The three variables of cesia —darkness, permeability, diffusivity— with the two extremes (100% and 0%) and an intermediate case (50%).

Permeability 100%

Permeability 0%

Permeability

Permeability 50%

Association Internationale de la Couleur International Color Association Internationale Vereinigung f端r die Farbe

www.aic-color.org