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Ceea ce este rezoluţie a ochiului uman? Cât de multe megapixeli?
Mai întâi de toate, vreau să încep prin a stat ca ochiul uman este o structura analogic si nu este complet posibil să-l măsura cu o dimensiune pixel digital termen. Centrul vederii din creier nu poate pereive informaţii lumina din ochi ca o perdea de film. Creează o imagine prin comentarea lumina informatii la creier. Această imagine este reactualizat constant, în funcţie de viteza de neuroni care merg în creier, adică nerand celule.
De exemplu, dacă noi considerăm că este o valoare de fps (cadru pe secundă), 30fps la un film este suficientă pentru ochii pentru a vedea imaginea complet fluent. Dar asta nu înseamnă că ochiul uman este de 30fps. Ochiul uman are o anumită valoare de prag, şi atunci când te uiţi la un obiect de întâlnire, care este mai rapid decât această valoare, nu poate captura mişcările lui şi vad ca nimic nu a trecut. Folosind camere cu viteze de fotografiere de mare utilizate in zilele noastre, mişcarea de un glonţ poate fi uşor examained în milisecunde.
Putem face un simplu test de viteza de ochiul uman. În primul rând, aduce frecvenţa verticală de scanare a monitorului de calculator CRT (tub catodice) la 60 Hz. Pentru aceasta, faceţi clic dreapta pe desktop şi selectaţi Proprietăţi, şi apoi urmaţi filele monitor pentru a accesa setările de Hz. După având-o la 60 Hz, uita-te la ecranul la o distanţă de 30cm, se concentreze pe un obiect pe partea laterală a monitorului, dar vedea monitorul cu vârful de ochi. Veţi observa cum refresh a ecranului, care în mod normal, nu vă simţiţi atunci când sunteţi în căutarea drepte este scanate de sus în jos. Dacă observaţi 60 Hz, în timp ce sunteţi în căutarea la ea în mod normal, încercaţi să-l la 75 Hz. Mă descurc eu la 75 Hz, dar nu văd nici mai multe tranzițiile de pagini la 85 Hz şi mai sus. Viteza de ochi poate varia de la persoană la individuale. Oamenii care urmăresc în mod constant detaliate şi se deplasează lucruri cu ochii lor şi funcţionează foarte carely cu high-ochi reflexe sunt văzute mai repede.
Retina cu senzori de lumină din ochii nostri este o membrană formată dintr-o structură neuronale. Senzori de lumina la nivelul retinei sunt dimensiunea digital aparat de fotografiat, precum şi senzori. De fapt, în groapă porţiunea de la nivelul retinei (foveei), numerele de aceşti senzori sunt mai mult decât alte regiuni şi lumina pe retină este comprimat în creier. Că pe ce ne uităm la ne, uneori, şi putem vedea modul în care acestea sunt. Numărul de celule de senzor de lumină în ochi (sau noastre spun pixel) nu este iertat de calitatea vederii, atâta timp cât acesta este mai sus o anumită valoare critică. Deoarece creierul completeaza imaginea. Chiar daca nu avem un singur ochi, noastre rezoluţia imaginii nu este deccreased, doar un pic de adâncime sentiment dispare. Noi nu vedem o parte din imagine lipseşte, chiar şi în cazurile în care majoritatea celulelor lumina în ochi ruained, numit "Dezlipire". Ne putem uita la ea ca asta: esti închidere jumătate obiectiv pe aparatul de fotografiat, dar încă vedea imaginea completă; Deoarece aparatul de fotografiat procesorul completeaza partea lipsă.
Pentru a exprima capacitatea de viziune ochi ca megapiels, este necesar să testeze ochii de receptori în pixeli, gândire despre ce nivel de detaliu poate crea creierului. Ochiul uman este un organ mic şi o face toate lucrurile cu o cantitate mica de lumina care vine asupra ei. Dar lentilele de înaltă-megapixel aparat de fotografiat sunt destul de mare, şi în funcţie de aceasta, ei văd zone mult mai luminat într-o scenă întuneric decât ochiul uman. Se poate spune în mod clar că, dacă luaţi cea mai mare rată de megapixeli cu un obiectiv ochi de dimensiuni şi apoi trageţi fotografia şi să o compare cu acelaşi peisaj, sunt sigur că ochiul uman pot fi mai multe detalii şi. Fotografie luată de către maşină digitală va fi înţeles că se pot înregistra detaliu mult mai puţin în cazul în care este de a fi fotografiate şi examinate la fel ca oamenii sunt văzute fără zoom.
Prin urmare, ochiul uman este un organ care este prea perfect pentru a fi comparate cu imaginea de lentile artificiale. Dar date digitale poate fi exprimat ca megapiels. În cazul în care condițiile menționate mai sus sunt furnizate, calculul poate fi efectuată prin plasarea o valoare de aproximativ. Dar noi nu ar trebui să fie capabili să gândească că termenul megapiels nu este altceva decât un concept care arată cât de mulţi pixeli fapt sunt afişate într-o scenă. Desigur, mai mulţi pixeli va căuta, mai detaliat este, dar pentru a compara-l la procentul de ochiul uman, este necesar să insider temă ca un subiect de cercetare majore şi investiggate şi experimentale în condiţii de laborator.
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svenska
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việt
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Suomalainen
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