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Stebuklingas lamūnsparnis

Žė, šitam malūnsparniui net nereikia sukti savo propelerio, kad skristų!

O šiaip, tai viskas paprasta: propeleris sukasi kaip reikiant, tiesiog filmavimo greitis (tai yra ne kas kita, kaip labai dažnas fotografavimas) sutampa su sukimosi greičiu. O tai reiškia, kad tarp kadrų nufotografavimo, propeleris spėja apsisukti tiksliai ratą ir jis pratraukiamas tiksliai tokioje pačioje padėtyje. Bet atrodo tai fainai, ane? ;)

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Komentarai (45)

  1. xLapinasx:

    Gerulis, nemirtingai atrodo.

  2. Archatas:

    Tik gaila, kad video nebeegzistuoja.. Bet galima įsivaizduot. :D

  3. eziukassukedais:

    sutvarkiau ir dėl visa pikto dar parsisiunčiau į kompą

    daba tikrai niekur nepranyks :P

  4. Anonymous:

    O tai kodel tie sparnai neissilieja, gi del didelio sparnu greicio vaizdas liejasi visose kamerose? m?

  5. eziukassukedais:

    vaizdas liejasi, kai kamera sparnus užfiksuoja įvairiose padėtyse. tai mums atrodo kaip tieisog labaio greitai besikaičianti sparnų padėtis, todėl matom susiliejimą. o va kai kamera sparnu užfiksuoja vis toje pačioje padėtyje, gauname filmuke gautą rezultatą.

  6. Anonymous:

    Įdomu kokiu būdu galima pasiekti momentinio fotografavimo ir sparnų sukimosi sinchronizacijos?

  7. Anonymous:

    Šiaip jau ne visai dėl to mes matome sulietą vaidą. Tiesiog taip kamera užfiksuoja, netgi jei tu žiūrėtum po kadrą visviena gautum sulietą vaizdą. Taip gaunasi dėl išlaikymo, pvz. jei naudoji išlaikymą 1/8s tai per tą laiką malunsparnio sparnas apsisuks 1,5 karto ir visa tai bus užfiksuota vienoj nuotraukoj/vienam kadre, tačiau jei išlaikymas 1/1000 jis tepasisuks 2 laipsnius.

  8. Tas pats Anonymous apie išlaikymą :):

    Beje man taip atrodo (IMHO), kad paprasto filmavimo kameros po default naudoja 1/25s išlaikymą, t.y. kadangi filmuoja 25fps tai pas 1/25 tiesiog pakeičia į naują kadrą ir iš naujo fiksuoja, per tiek gaunasi apie 1/2 apsisukimo taigi kiekvienam kadre matom kiekvieną ašmenį praėjusį pusę rato, tačiau kadangi jie paprastai 3 tai ir perdengia vienas kitą ir matome išsiliejusį ratą.

    O šitas video turbūt padarytas naudojam labai mažą išlaikymą, per kurį ašmenys beveik nepasisuka.

    Tai vat taip eliminuojamas išsiliejimas.

    O dabar tai, kad jie visada stovi vietoj tai naudojamas atitinkamas fps. tarkim sukasi sparnai 6,(6)Hz dažniu, taigi jei yra 3 ašmenys ir mes naudojam 20fps gaunasi kad ties kiekvienu kadro darymu rotorius pasisuka 1/3 rato ir ašmenys atsistoja į tas pačias vietas.

    Dar turbūt reikėtų paminėti, kad malūnspranių ašmenys paprastai sukasi labai tiksliu RPM ir negali labai smarkiai nukrypt, tačiau manevrai ir daromi keičiam RPM tais keliais leistinais %. Taigi todėl šitam video ir atrodo, kad manevruojant jie šiek tiek pasisuka, nes nebepataiko į fps.

  9. Lamūnsparnis :D

  10. hmm o galinis sraigtas matosi sukasi matyt jo kitoks periodas nei pagrindinio sraigto

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