Kodi Phase Detection Autofocus ndi chiyani PDAF imagwira ntchito
Kodi Phase Detection Autofocus ndi chiyani PDAF imagwira ntchito

Phase Detection Autofocus, PD Autofocus mu Mafoni Amakono, Zovuta za PDAF, Momwe PDAF (Phase Detection Autofocus) imagwirira ntchito, PDAF ndi chiyani -

Makamera amapangidwa ndi masensa, makina owongolera, ndi mota. Autofocus idabwera pachithunzipa kuti ithetse vuto lachithunzithunzi lomwe lidabwera chifukwa cha miyeso yolakwika. Tekinoloje ya Autofocus imakonza chithunzi chomwe chimayang'ana molakwika pokhala odalirika pa masensa kuti apeze komwe akulunjika.

Zambiri zomwe zidapangidwa pambuyo pake, Autofocus idasiyanitsidwa ndi masensa achangu, osagwira ntchito, komanso osakanizidwa a AF (Autofocus). Phase Detective Autofocus (PDAF) idapangidwa kutengera sensor ya Autofocus.

Mosiyana ndi AF yogwira ntchito pogwiritsa ntchito, mafunde a infrared kapena ultrasound kuyeza mtunda wa phunzirolo, Autofocus yokhazikika imagwiritsa ntchito kuzindikira kwa gawo, masensa osiyanitsa, kapena zonse ziwiri. Komabe, ndi ochepa omwe amagwiritsa ntchito kuwala kwa infrared kulibe kuwala kokwanira.

Mafoni am'manja amasiku ano ndi makamera a DSLRs ali ndi ukadaulo uwu ndipo amakhulupirira kuti ndiukadaulo wachangu kwambiri womwe umayesa chinthucho.

Tiyeni tiwone momwe ukadaulo wa PDAF umagwirira ntchito!

Kodi PDAF (Phase Detection Autofocus) imagwira ntchito bwanji?

Ndi kusinthika kwaukadaulo wojambula zithunzi, malingaliro anzeru samatha zomwe zimadzetsa kukayikira mwa anthu. Ngati wina akuyenera kumvetsetsa m'mawu osavuta momwe PDAF imagwirira ntchito, tiyeni tifufuze zaukadaulo wa DSLR.

  • Makamera ali ndi magalasi awiri ndi ma microlens awiri.
  • Galasi loyamba ndi galasi lalikulu la reflex ndipo lachiwiri ndi galasi laling'ono lachiwiri.
  • Kuwala kotengedwa kuchokera mbali ina ya ma microlens awiri kumalowa mu galasi lalikulu, lomwe limawonekera pa galasi lachiwiri.
  • Masensa a PDAF amalowa mu sewerolo kuwala kumadutsa kuchokera pagalasi lachiwiri.
  • Kuwala kochokera pagalasi lachiwiri kumalunjika ku sensa ya PDAF, yomwe imatsogolera ku gulu la masensa.
  • Nthawi zambiri, masensa awiri amayikidwa pa mfundo imodzi ya AF. Zithunzi zochokera ku masensa zimawunikidwa ndi kamera.
  • Ngati zithunzi zomwe zapezedwa sizili zofanana, masensa a PDAF amalangiza mandala a kamera kuti asinthe moyenera.
  • Mpaka kuyang'ana koyenera kukhazikitsidwa, njirayi imabwerezedwa kangapo.
  • Pomwe kuyang'ana koyenera kukwaniritsidwa, dongosolo la AF limazindikira izi ndikutumiza chitsimikiziro kuti chinthu chomwe chikutsatiridwa chikuyang'ana.

Nkhani za Autofocus zimachitika ngati mtunda pakati pa phiri la lens ndi sensa ya kamera ndi mtunda pakati pa phiri la lens ndi masensa sali ofanana. Ngakhale kuti kufotokozera kwa izi ndi kwautali, zonsezi zimachitika pang'onopang'ono pa sekondi imodzi ndipo motero zimatengedwa kuti ndizo zamakono zamakono.

PDAF mu Mafoni Amakono

Ngakhale njira ya PDAF imagwiritsidwa ntchito kwambiri mu DSLRs, mitundu ingapo ya mafoni a m'manja agwiritsa ntchito izi pama foni awo.

Zimatenga pafupifupi masekondi 0.3 kuti mufananize zithunzi zomwe zikudutsa mu lens. Tsoka ilo, mafoni sangathe kukhala ndi masensa awiri a PDAF. Chifukwa chake zimabwera ndi chinthu chodziwika kuti 'Zithunzi za zithunzi'.

Ma photodiode amaphimbidwa kuti alole kuwala kuchokera mbali imodzi yokha ya lens kupatsa foni yamakono zithunzi ziwiri kuti zifananize ndi kuyang'ana. Ngati chithunzi chomwe chapezedwa sichikuyang'ana ndiye kuti masensa amathandizira mandala kuti asinthe zofunikira.

Zoyipa za PDAF:

  • Sensor mayikidwe vuto ndi vuto lalikulu ngati opanga alibe anaika mapulogalamu PDAF popeza masensa ndiye malangizo a munthu kamera kusintha koyenera.
  • Kuwala kocheperako sikungalole masensa a PDAF kuyang'ana chithunzicho moyenera.
  • Zimatenga nthawi mukuyesera kuti ma lens ayang'ane pogwiritsa ntchito ma apertures akulu.

Zonse mwazonse, PDAF imagwira ntchito modabwitsa poyesa kujambula mutuwo mukuyenda momwe imathamanga kwambiri. Imakulolani kujambula zithunzi ndikujambulabe moyo m'njira yodabwitsa. Ponseponse, Kuzindikira kwa Gawo AF ndikofulumira komanso kolondola kuposa AF yachikhalidwe.

Ndi kujambulidwa kwa mafoni a m'manja ngati chinthu chatsopano, anthu ambiri akufunafuna mafoni omwe amabwera ndi masensa a PDAF.