Yintoni iSigaba sokuFumana i-Autofocus Isebenza njani iPDAF
Yintoni iSigaba sokuFumana i-Autofocus Isebenza njani iPDAF

ISigaba sokuFunyaniswa kwe-Autofocus, iPD Autofocus kwii-smartphones, i-Drawbacks ye-PDAF, Isebenza njani i-PDAF (iSigaba sokuQala i-Autofocus), Yintoni iPDAF -

Iikhamera zakhiwe ngezixhobo zoluvo, inkqubo yolawulo, kunye nenjini. I-Autofocus yeza emfanekisweni ukusombulula umba womfanekiso omfiliba obangelwe yimilinganiselo engachanekanga. Itekhnoloji ye-Autofocus ilungisa umfanekiso ogxininise kakubi ngokuthembeka kwi-sensor ukufumana ugxininiso oluchanekileyo.

Uninzi lwezinto eziye zaqanjwa kamva, i-Autofocus yahlulwa kwi-active, passive, kunye ne-hybrid AF (Autofocus) izinzwa. Isigaba somcuphi we-Autofocus (PDAF) sakhiwe ngokusekwe kwi-Autofocus sensor.

Ngokuchasene ne-AF esebenzayo usebenzisa, amaza e-infrared okanye i-ultrasound ukulinganisa umgama wesifundo, i-Autofocus esebenzayo isebenzisa ukubonwa kwesigaba, i-sensor sensors, okanye zombini. Nangona kunjalo, bambalwa abasebenzisa isibane se-infrared xa kungekho kukhanya okwaneleyo.

Uninzi lwee-smartphones zanamhlanje kunye neekhamera ze-DSLRs zixhotyiswe ngobu buchwepheshe kwaye zikholelwa ngakumbi okanye ngaphantsi njengezona teknoloji zikhawulezayo ezilinganisa into ekugxilwe kuyo.

Makhe sibone ukuba iteknoloji yePDAF isebenza njani!

Isebenza njani iPDAF (Phase Detection Autofocus)?

Ngophuhliso lwetekhnoloji yokufota, iimbono ezintsha azipheli nto leyo iphakamisa amathandabuzo ebantwini. Ukuba umntu kufuneka aqonde ngendlela elula ukuba iPDAF isebenza njani, masigrumbe kubuchwephesha be-DSLR.

  • Iikhamera zixhotyiswe ngezibuko ezibini kunye ne-microlenses ezimbini.
  • Isibuko sokuqala sisipili esiphambili se-reflex kwaye esesibini sisipili esincinci sesibini.
  • Ukukhanya okubanjiweyo ukusuka kwelinye icala le-microlenses ezimbini kungena kwisibuko esikhulu, esibonakaliswa kwisibuko sesibini.
  • Iinzwa zePDAF ziza kudlala emva kokuba ukukhanya kudlule kwisibuko sesibini.
  • Ukukhanya okuvela kwisibuko sesibini sibhekiswe kwi-PDAF sensor, eqondisa kwiqela leenzwa.
  • Ngokuqhelekileyo, abenzi boluvo ababini bafakelwa kwindawo enye ye-AF. Imifanekiso evela kuluvo ngoko ivavanywa yikhamera.
  • Ukuba imifanekiso efunyenweyo ayifani, i-PDAF sensors iyalela i-lens yekhamera ukuba ilungelelanise ngokufanelekileyo.
  • De ugqaliselo oluchanekileyo luqwalaselwe, le nkqubo iphinda iphindwe kaninzi.
  • Ngokukhawuleza ukuba ugxininiso oluchanekileyo luphunyeziwe, inkqubo ye-AF iyayibona loo nto kwaye ithumela isiqinisekiso sokuba into elandelwayo igxile.

Imiba ye-Autofocus ivela ukuba umgama phakathi kwe-lens mount kunye nekhamera yekhamera kunye nomgama phakathi kwe-lens mount kunye neenzwa azifani. Nangona ingcaciso yoku inde, konke oku kwenzeka kwiqhezu lesekondi kwaye kungoko kujongwa njengeyona teknoloji ikhawulezayo.

IPDAF kwii-smartphones

Nangona ubuchule bePDAF busetyenziswa kakhulu kwii-DSLRs, iibrendi ezininzi ze-smartphone ziye zasebenzisa oku kusebenza kwii-smartphones zazo.

Kuthatha malunga nemizuzwana eyi-0.3 ukuthelekisa imifanekiso edlula kwilensi. Ngelishwa, ii-smartphones azikwazi ukuxhotyiswa ngeenzwa ezimbini zePDAF. Yiyo ke iza nento eyaziwa ngokuba 'Iifotodiodes'.

Iifotodiode zigqunywe ngesigqubuthelo ukuvumela ukukhanya ukusuka kwicala elinye kuphela lelensi enika i-smartphone imifanekiso emibini ukuthelekisa kunye nokugxila. Ukuba umfanekiso ofunyenweyo awugxininisi ngoko abenzi boluvo benza i-lens yenze utshintsho oluyimfuneko.

Ukungaphumeleli kwePDAF:

  • Umba wolungelelwaniso lwenzwa yingxaki enkulu ukuba abavelisi abayifakanga isoftware yePDAF ukusukela oko abenzi boluvo ke ikhamera yemiyalelo yomntu ukwenza utshintsho oluyimfuneko.
  • Imiba yokukhanya okuphantsi inokungavumeli abenzi boluvo bePDAF ukuba bagxile kumfanekiso ngokuchanekileyo.
  • Kutya ixesha ngelixa uzama ukwenza ilensi igxile usebenzisa imikrolo ebanzi.

Yonke into enye, iPDAF isebenza kakuhle ngokumangalisayo ngelixa izama ukubamba isihloko ngentshukumo njengoko ikhawuleza kakhulu. Ivumela ukufota imifanekiso kunye nokufota ubomi ngendlela engakholelekiyo. Lilonke, ubhaqo lweSigaba iAF ikhawuleza kwaye ichaneke ngakumbi kunochaso lwemveli lwe-AF.

Ngokufota kwe-smartphone njengento entsha yokuzonwabisa, abantu abaninzi baya kwiifowuni eziza ne-PDAF sensors.