CESIA (introduction)

José Luis CAIVANO caivano@fadu.uba.ar

University of Buenos Airesand National Council for Research

Argentine Color Group

Atributes

1. Lightness2. Hue 3. Saturation

4. Size5. Shape6. Location

7. Flicker8. Sparkle

9. Transparency10. Glossiness11. Luster

COLOR

spatialaspects:FORM

CESIA

temporal variations of light

MODES OF APPEARANCE OF COLOR(Optical Society of America)

Maitland Graves

1. line2. direction3. shape4. size5. texture6. value7. color

Arthur Pope

3 spatial factorspositionsize shape

3 tonal factorsvaluehueintensity

Bruno Munari

visual support1. texture 2. shape 3. structure4. module5. motion[¿and color?

Other authors

2 inclusive categories

form

color

Sven Hesselgren

1. form2. color3. light4. texture

Our classification

1. spatial form2. visual texture 3. color4. cesia5. motion

colors

spatial forms

textures

cesias

Reflective and transmissive objects are two forms of absorbent objects.

emisive reflective transmissive

Three types of objects in the world:

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).

primary sources

secondary 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)

diffuse transmission

(traslucent)

regularreflection

(mirrorlike)

regulartransmission(transparent)

absorption(dark or black)

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

Permeability100%

PermeabilityPermeability0%

Permeability50%

Association Internationale de la CouleurInternational Color AssociationInternationale Vereinigung für die Farbe

www.aic-color.org