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Qual è la risoluzione dell'occhio umano? Quanti megapixel?
Prima di tutto, voglio iniziare affermando che l'occhio umano è una struttura analogica e non è completamente possibile misurarla con una dimensione di pixel a termine digitale. Il centro di visione nel cervello non può peretive le informazioni chiare dagli occhi come una tenda della pellicola. Crea un'immagine commentando le informazioni chiare dal cervello. Questa immagine è costantemente aggiornata, a seconda della velocità dei neuroni che entrano nel cervello, cioè le cellule nerand.
Per esempio, se lo consideriamo un valore di fps (fotogramma al secondo), il 30fps in un filmato video è sufficiente per i nostri occhi per vedere l'immagine completamente fluente. Ma questo non significa che l'occhio umano è 30fps. L'occhio umano ha un certo valore di soglia, e quando si guarda un oggetto che passa più veloce di quel valore, non può catturare i suoi movimenti e vederlo come nulla è passato. Utilizzo di fotocamere con tempi di posa elevati utilizzati al giorno d'oggi, il movimento di un proiettile può essere facilmente examained in millisecondi.
Possiamo fare un semplice test per la velocità dell'occhio umano. In primo luogo, portare la frequenza di scansione verticale del monitor del computer per la CRT (tubo catodo) a 60 Hz. A tale proposito, fare clic con il pulsante destro del mouse sul desktop e selezionare proprietà, quindi seguire le schede del monitor per accedere alle impostazioni di Hz. Dopo averlo a 60 Hz, guardare lo schermo ad una distanza di 30cm, concentrarsi su un oggetto sul lato del monitor, ma vedere il monitor con la punta dell'occhio. Noterete come l'aggiornamento dello schermo che normalmente non si sente quando si sta guardando dritto è scansionato da cima a fondo. Se si nota il 60 Hz mentre si sta guardando normalmente, provalo a 75 Hz. Posso gestire da solo a 75 Hz, ma non riesco a vedere più transizioni di pagina a 85 Hz e sopra. La velocità dell'occhio può variare da persona a individuo. Le persone che seguono costantemente le cose dettagliate e in movimento con i loro occhi e lavorare con molta cura con i riflessi ad alto occhio sono visti più velocemente.
La retina con i sensori luminosi dei nostri occhi è una membrana costituita da una struttura neurale. I sensori di luce nella retina sono le dimensioni delle fotocamere digitali e dei sensori. Infatti, nella parte del pozzo della retina (fovea), i numeri di questi sensori sono più di altre regioni e la luce che cade sulla retina è compressa nel cervello. Ecco perché a volte ci guardiamo e vediamo come sono. Il numero di cellule del sensore di luce nel nostro occhio (o dire pixel) non è perdonato dalla qualità della visione fino a quando è al di sopra di un certo valore critico. Perché il cervello completa l'immagine. Anche se non abbiamo un occhio, la nostra risoluzione dell'immagine non è deccreased, solo un po' di sensazione di profondità scompare. Non vediamo una parte dell'immagine mancante, anche nei casi in cui la maggior parte delle cellule di luce negli occhi sono ruained, chiamato retinico "distacco". Possiamo guardare come questo: si sta chiudendo la metà della lente sulla fotocamera, ma si vede ancora l'immagine piena; Perché il processore della fotocamera completa la parte mancante.
Al fine di esprimere la capacità di visione dell'occhio come megapiels, è necessario testare gli occhi dei recettori in pixel, pensando a quale livello di dettaglio il cervello può creare. L'occhio umano è un piccolo organo e fa tutte le cose con una piccola quantità di luce che scende su di esso. Ma le lenti delle telecamere ad alta megapixel sono abbastanza grandi, e a seconda di esso, vedono le aree molto più illuminato in una scena scura che l'occhio umano. È possibile dire chiaramente che se si prende il più alto tasso di megapixel con un occhio di dimensioni lente e poi tirare la fotografia e confrontarlo con lo stesso paesaggio, sono sicuro che l'occhio umano può essere più dettagli e. La fotografia scattata dalla macchina digitale sarà intesa che può catturare molto meno dettaglio se viene fotografato ed esaminato allo stesso modo che le persone sono viste senza zoom.
Pertanto, l'occhio umano è un organo che è troppo perfetto per essere confrontato con l'immagine di lenti artificiali. Ma i dati digitali possono essere espressi come megapiels. Se vengono fornite le condizioni sopra menzionate, il calcolo può essere effettuato inserendo un valore approssimativamente. Ma non dovremmo essere in grado di pensare che il termine megapiels non è altro che un concetto che mostra il numero di pixel sono effettivamente visualizzati in una scena. Naturalmente, più pixel si guarderà, più è dettagliato, ma per confrontarlo con la proporzione dell'occhio umano, è necessario Insider il soggetto come un soggetto di ricerca importante e investiggate e sperimentale in condizioni di laboratorio.
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