VIZIJSKI SUSTAVI
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Transcript of VIZIJSKI SUSTAVI
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VIZIJSKI SUSTAVI
Matija Šaban
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SADRŽAJ
Svjetlo Ljudski vizualni sustav Boja Prostor boja
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SVJETLO
Vidljivo dio spektra: 380 nm - 780 nm
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SVJETLO
Dualna teorija zračenja Valna teorija Kvantna teorija
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SVJETLO
Valna teorija – svjetlost se širi prostorom kao elektromagnetski val
Brzina širenja:
c – brzina širenja vala [m/s]f – frekvancija zračenja [Hz]
– valna duljina [m]
fc
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SVJETLO
Kvantna teorija – svako je zračenje sastavljeno od elementarnih energetskih čestica (fotona)
Energija zračenja:
h = 6,6256 · 10-34
h – Planckova konstantaf – frekvencija zračenja
fhW
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SVJETLO
Podjela svjetla s obzirom na frekventni sastav: Monokromatsko Složeno
Kontinuirano diskretno
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SVJETLO
Generiranje umjetnog svjetla:Termičko zračenjeLuminiscentno zračenje
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SVJETLO
Termičko zračenje
424
4
106697,5Tm
W
TM
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SVJETLO
Luminiscentno zračenje
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LJUDSKI VIZUALNI SUSTAV
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LJUDSKI VIZUALNI SUSTAV
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LJUDSKI VIZUALNI SUSTAV
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LJUDSKI VIZUALNI SUSTAV
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BOJA
Doživljaj boje ovisi o:Spektralnom sastavu svjetlaMolekularnoj strukturi tijelaČovjekovim osjetom boje
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BOJA
Definicija boje:Ton bojeZasićenost (saturacija)Svjetlina (luminancija)
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BOJA
Skupine boja:Kromatske boje
Akromatske boje
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BOJA
Svjetlina boje:
Zasićenost boje:
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BOJA
Primarne boje: Crvena Zelena Plava
Sekundarne boje (subtraktivni primari): Žuta Magenta Cijan
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BOJA
Aditivna sinteza
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BOJA
Subtraktivna sinteza
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PROSTOR BOJA
CIE RGBustanovljen 1931. od strane Commision
Internationale de l’Eclairageprimarne boje: plava = 435.8nm,
zelena = 546.1nm, crvena =700nm
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PROSTOR BOJA
CIE RGBSpektralna raspodjela fotona:
Osjetljivost čunjića
dSES
dMEM
dLEL
rot
rot
rot
IRE
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PROSTOR BOJA
CIE RGB
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PROSTOR BOJA
CIE xyz
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PROSTOR BOJA
CIE xyzTrikromatski koeficijenti:
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PROSTOR BOJA
CIE xyYKompletni obojani modelPreko ovog modela predstavljau se kromatski
dijagrami
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PROSTOR BOJA
Spektralni dijagram
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PROSTOR BOJA
RGB
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PROSTOR BOJA
Lab modelL – luminance
(svjetlina)
a – crveno/zeleno
b – žuto/plavo
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PROSTOR BOJA
CMY(K) Subtraktivan model Važan za medije kod
kojih se vizualne informacije o boji primaju odbijanjem svjetlosti
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PROSTOR BOJA
HSV H – hue S – saturation V - value