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Visual perception

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Information about Visual perception
Design

Published on February 26, 2014

Author: robertodadda

Source: slideshare.net

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Visual perception fundamentals for web designers
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Mater of Arts in Communication Design WEB DESIGN Visual perception Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 1

Visual perception is the ability to interpret the surrounding environment by processing information that is contained invisible light. Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 2

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I see vs I feel Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 4

1/3 of brain energy! • We get 70% of information by vision Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 5

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Cones • Sensitive to colors • Concentrated in the center • 6,000,000 Rodes • • • • • Sensitive to light intensity Insensitive to colors Night vision and movement Concentrated in the periphery 120,000,000 Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 10

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Sensitivity is not omogenueous • Diferences in green are are more perceived then in red area • More pigment addition needed to feel a different color Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 13

Blind spot Right eye Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 14

Focusing Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 15

Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 16

Geting older makes focusing less easy Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 17

Optic chiasma Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 18

Vision and thinking Vision and thinking are always interconnected Data are continuously under elaboration. We recognize objects, even if we see them only partially and we some times we are deceived. Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 19

Automatic correction of brightness On the sun Into a room White paper 120 6 Black ink 12 0.6 David Hubel Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 20

EMOTION Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 21

Synestesia Synesthesia (also spelled synæsthesia or synaesthesia, from the ancient Greek σύν [syn], "together", and αἴσθησις *aisthēsis], "sensation") is a neurological phenomenon in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 22

WEB DESIGN NABA 2014 Roberto DADDA Tina Modotti Titolo lezione 23

WEB DESIGN NABA 2014 Roberto DADDA Ansel Adams Titolo lezione 24

WEB DESIGN NABA 2014 Roberto DADDA Henry Cartier Bresson Titolo lezione 25

Different distance or different dimension? Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 26

Gustave Caillebotte (Parigi, 19 agosto 1848 – Gennevilliers, 21 febbraio 1894) 27 WEB DESIGN NABA 2014 Roberto DADDA Titolo lezione

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Viewing point Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 30

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Lateral inhibition (Mach effect) Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 34

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Eye movements • Saccade refers to a rapid jerk-like movement of the eyeball which subserves vision by redirecting the visual axis to a new location. (400⁰/s, 20-50 ms) • Fixation refers to keeping eye on a specific position. Vision is dependent upon the information taken in during fixation pauses between saccades: no useful visual information is taken in while the eyes are making a saccadic movement. • Scanpath the sum of those actions http://www.scholarpedia.org/article/Human_saccadic_eye_movements Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 37

Some measured data Action Silent reading Loud reading Visual search Image inspection Fixation time Saccade angle ms ⁰ 225 2⁰ (8 char) 275 1.5⁰ (6 char) 275 3⁰ 330 4⁰ Mean values Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 38

Roberto Dadda www.dadda.it roberto@dadda.it +39 338 775 22 03 Twitter, facebook, linkedin: robertodadda Titolo lezione WEB DESIGN NABA 2014 Roberto DADDA 39

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