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Hva er oppløsningen for det menneskelige øyet? Hvor mange megapiksler?
Først av alt, ønsker jeg å starte av stat at det menneskelige øyet er en analog struktur og det er ikke helt mulig å måle den digitale begrepet piksel størrelse. Visjon sentrum i hjernen ikke pereive lys informasjonen fra øyne som en film gardin. Skaper et bilde ved å kommentere lys informasjon fra hjernen. Dette bildet oppdateres hele tiden, avhengig av hastigheten på nerveceller som går inn i hjernen, i.e. nerand celler.
For eksempel, hvis vi vurdere det en verdi av fps (ramme per sekund), er 30fps i en videofilm tilstrekkelig for våre øyne å se bildet helt flytende. Men det betyr ikke at det menneskelige øyet er 30fps. Det menneskelige øyet har en viss terskelverdi, og når du ser på et passerende objekt som er raskere enn denne verdien, det kan ikke fange hans bevegelser og ser det som noe har gått. Kameraer med høy lukkerhastighet brukes i dag, kan bevegelsen av en kule enkelt examained i millisekunder.
Vi kan gjøre en enkel test for hastigheten for det menneskelige øyet. Først, ta vertikal frekvensen av skjermen til CRT (cathode rør) til 60 Hz. Dette gjør Høyreklikk på skrivebordet og velg egenskaper, og følg deretter kategoriene skjermen til innstillingen Hz. Måtte det 60 Hz, se på skjermen i en avstand på 30cm, Fokuser på et objekt på siden av skjermen, men se skjermen med øyet drikkepengene. Du vil se hvordan skjermoppdatering som du normalt ikke føler når du ser rett skannes fra topp til bunn. Hvis du oppdager 60 Hz mens du ser på den normalt, prøve det på 75 Hz. Jeg kan håndtere det selv til 75 Hz, men jeg kan ikke se noen mer sideoverganger på 85 Hz og over. Hastigheten på øyet kan variere fra person til individuelle. Personer som følger stadig detaljert og rørende ting med øynene og arbeide veldig carely med høy-øye reflekser vises raskere.
Netthinnen med lette sensorene våre øyne er en membran som består av en neural struktur. Lette sensorene i netthinnen er størrelsen på digitale kameraer, samt sensorer. Faktisk i den grav delen av netthinnen (fovea), antall disse sensorene er mer enn andre regioner og lyset faller på netthinnen komprimeres til hjernen. Som 's hvorfor vi ser på oss noen ganger og vi se slik er de. Antall lyssensor celler i våre øyne (eller si piksel) er ikke tilgitt av kvaliteten på visjon som det er over en viss kritisk verdi. Fordi hjernen fullfører bildet. Selv om vi ikke har ett øye, våre bildeoppløsning er ikke deccreased, bare en liten bit av dyp følelse forsvinner. Vi ser ikke en del av bildet mangler, selv i tilfeller hvor fleste lys cellene i øyet er ruained, kalt "Netthinneavløsning". Vi kan se på det som dette: du lukker halv linsen på kameraet, men du fortsatt se bildet full; Fordi kameraets prosessor fullfører den manglende delen.
For å uttrykke øyets visjon kapasitet som megapiels, er det nødvendig å teste øynene til receptors i piksler, tenker om hvilket detaljnivå hjernen kan opprette. Den gjør alt med en liten mengde lys som kommer på det menneskelige øyet er et lite organ. Men linser av høy-megapixel kamera er ganske store, og avhengig av det, de ser mye mer opplyste områder i en mørk scene enn det menneskelige øyet. Det er mulig å si klart at hvis du tar det aller høyeste megapixel rate med en øye-størrelse linse og deretter dra fotografiet og sammenligne den med det samme landskapet, jeg er sikker det menneskelige øyet kan være mer og. Fotografiet tatt av digitale maskinen vil bli forstått at det kan ta mye mindre detaljer hvis det blir fotografert og undersøkt på samme måte som folk er sett uten zooming.
Derfor er det menneskelige øyet et organ som er også perfekt sammenlignes med bildet av kunstige linser. Men digitale data kan uttrykkes som megapiels. Hvis betingelsene ovenfor tilbys, utføres beregningen ved å plassere en verdi av ca. Men vi bør ikke være i stand til å tenke at begrepet megapiels er ingenting, men et konsept som viser hvor mange piksler vises i en scene. Selvfølgelig, jo flere piksler det ser, jo mer detaljert det er, men for å sammenligne den andelen av det menneskelige øyet, er det nødvendig å insider emnet som store forskning emne og investiggate, og eksperimentelle i laboratorium.
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