An yi shi cikin dadi? Sana'a duk a cikin cikin dadi a detail

Ni shi na so?

Autofocus (ko AF suna daidai) ya ci gaba a cikin kamera ne, ya saita daga wannan kamera a matsayi mai wani abin da aka samu shirin. Ya amfani da rubutu na hanyar tafiya mai binciken da aka samu tafiya na hanyar tafiya mai binciken da aka samu daga abubuwa, ya fuskata su daga kompiyuta, kuma ya soke motor mai gabatarwa daidai don gabatarwa. Kamar mai tsawo Kamarar Compact sunantakasun so Autofocus, kuma kamara SLR digital kuma kamara mirrorless suna iya hada Autofocus don latsa asali.

Gaskiya mai tsawon Autofocus

Saddarwar AF ya kasance masu gaskiyar da aka samfafa don gabatarwa saboda hanyar gabatarwa, kuma yanzu ne gaskiyarsa:

• AF Sensor: mai matakan Autofocus, ya kawo gabatarwa da idaka da idashin da aka samu daga abubuwan scene don kawo Autofocus kamara gabatarwa optimal.
• Processor kamara: yanayi data don wuce da AF sensor yanayi da kuma shigar da aiki na rubutu suna ke nufin aikawaƙe masanar rubutu don labari focus. tsarin da alamar rubutun yaɗa zai iya fadi a cikin aikacewa da dama autofocus.
• Mechanism Tsaye Rubutu: Yana gabatarwa don kawo optics a cikin rubutu don labari focus. tsarin da dama da aikacewa wannan mechanism yana lalci don labari fast da smooth autofocus.

Kuna same, wannan components suna yi sabon gida don aikacewa autofocus system, da aka samfara suka yi aikacewa don kamera ya yi automatically da fast focus don variety of shooting scenes.

Tatsuniya na AF types

Autofocus systems suna zaɓi a matsayin biyu na farko da scenario na wani ayyuka da suka so da suka amfani da su:

• contrast detection autofocus
• Phase Detection AF

Sani mai tabbatarwa su don hanyar bellow.

Contrast Detection AF

Saita na dama AF ya kira saita ne bari da yana soya masu hanyar sauka. Suna suna wannan suna, suka sami da saita ta tafiya wanda ya zua cikin gaba, ya kamata ake sami da wasu saukon saita. Saita ne kan yi amfani da shirin saita daidai don sauka daidai (misali, rubutun, shirin photography) kuma suna sami da shirin saita daidai. Kamar mutum, a cikin hanyar gabatarwa ko a cikin abubuwan mataki, Saita na Dama AF ya kamata ake sami da wasu gabatarwa, kuna faruwarwa suka soya suka sami da saita daidai.

Phase Detection AF

Saita na Phase Detection AF suka iya amfani da sensor na phase detection kuma don sami da masu hanyar rana bayan kamera. Wannan saita ya kira saita na karatu daidai, ya kamata ake amfani da shirin daidai don sauka a cikin hanyar dinamiki (misali, sports, wildlife photography). Saita na Phase Detection AF ya kira amfani da shirin daidai don sami da mataki mai duba da ke sami da saita daidai, kuma ya kamata ake sami da gabatarwa a cikin wasu hanyar gabatarwa.

Tsanfinsa na system autofocus

Girma step don autofocus ya ci gaba aikin object detection, waccen AF sensor ya samu scene da ya fahimta areas na high-contrast daya shi ne potential focus points. Da fatan wannan, algoritam na kamara ya kawo mai haduwa ga abubuwan object yadda user ya son fahimta.

Kunna suna potential focus point ya fiema, AF system ya yi measurement na distance. Don Contrast Detection AF, system ya samfinsa change na contrast a scene don suke amfani da optimal focus position. Phase detection AF, da fatan, ya kawo distance bayan target da kamara don suka samfinsa images daga cewa positions na sensor. Bayan measurement na distance, lens drive mechanism ya adjust optics a lens don suke rubuta focal length. Wannan process ya so daidai game da predetermined contrast ko phase state ya fiema, don suke baya image a sharpest focus.

Autofocus a system na kamara different

Digital Single Lens Reflex (DSLR) Kamara

Kamarar DSLR yana iya aikatawa systemin autofocus ta rubutuwa, daga kuma rubutun sensoran rubutuwa na phase detection a cikin kamarar. Suna suna masu rubutuwa da masu hanyar bayanin alamannan gaba-gaban kamarar, ya ke yi amfani da sabon wadannan rubutuwar daidai. Systemin autofocus na kamarar DSLR yana iya aikatawa mai tsarin photography, misali photography na sports, wildlife photography, wannan ne, kuma zai iya aikatawa dai dai tracking na abubuwan.

Kamarar Mirrorless

Kamarar mirrorless yana iya samun systemin contrast-detection autofocus, mai tabbatar da shugabanci na viewfinder na electronic. Wannan systema yana iya samun contrast na irayen aiki domin samun fadi na focus don focusing daidai. Systemin AF na kamarar mirrorless yana iya aikatawa mai tsarin photography, misali photography na portraits da landscapes, kuma zai iya samun rubutuwar daidai.

Kamarar Compact

Kamara ta dadi daidai, kuma wani a cikin kamara ta gabatar daidai na uso daidai, suna yi hakuri daidai na auto fokus. Hakuri na auto fokus haka ya kamata shirya contrast-detection da phase-detection techniques don labarar fokus daidai a cikin wani tsarin samfoti. Kamara ta dadi na auto fokus suna guda daidai don samfoti ta gabatar daidai daidai kuna yanzu kuna ne kan zuciya da kawai daidai.

Fannun daidai a cikin wannan ilimin taimaka

AF system daidai ya fiye masu taimaka kuma ya fiye masu wannan ilimin taimaka. A taimakon binciken, contrast da detail ta gabatar daidai ya yi hakuri daidai don AF sensor ya fara gabatar daidai da lock on to target, kuma hakuri na contrast detection da phase detection AF system suna yi hakuri daidai da sauran.

Da fatan suna daidai, tafiyar gaba a cikin kuma yana gabatar daidai don hanyar tsarin waniya. An yi shi daga wannan, AF ta gabatar daidai don hanyar tsarin waniya ya gabatar daidai. AF Phase Sensor, an yi amfani da sensor mai wucewa daga cikin, ya soya, amma kuma performance-ishi ya gabatar daidai.
Kadai da suka samu rubutu na farko, misali latsa da idon gaskiya zuwa idon labari, ko a cikin rubutu na samun abubuwa, system AF bane duba da aka samu sabunta da rubutu na farko. Kamera modernin daidai suka ne alamar daidai ake zama AF system don rubutu na farko daidai.

Ina ce AF mode

AFs different dai dai suka ne amfani daidai a cikin scenarios different dai dai da applications, da ke fitowa masu understanding don ina ce AF mode (AF) mai saiti:

• AF-S: Rubutu AF-S yana kewaye daga cikin aikacewa na shirin kuma rubutun da ke so daidai. Daga cikin rubutun haka, kamera ya taimakon wannan lokacin idan aka gabatar da rubutun fayil mai wuya gaba-gaban, kuma ya lock focus idan ya samu taimako. Rubutun haka yana kewaye daga cikin aikacewa na farko, rubutun na sabon rana, kuma rubutun na shirin karen sunaƙi a matsayin ita.
• AF-C: Rubutu AF-C yana bayyana daga cikin aikacewa na tsarin da ke so daidai. Daga cikin rubutun haka, kamera ya taimakon lokacin da aka samun samar daidai, ya kawo suka yi amfani da rubutun haka daga cikin aikacewa na spoots, rubutun na hayawan saba, kuma daga cikin aikacewan ne daga cikin ke so daidai.
• AF-A: Rubutu AF-A yana rubutun labari da aka samun samar daidai daga AF-S to AF-C depending daga cikin scene. Rubutun haka yana kewaye daga cikin masu aiki ne daga cikin kebira idan aka zuba rubutun fayil mai wuya gaba-gaban, kuma daga cikin scene ne daga cikin kebira idan rubutun fayil mai wuya gaba-gaban ya fara wataƙen samun samar daidai.

Fankan AF

Kuma suna daidai, ayyukan AF ya kawo shirin rubutuwa a cikin ayyuka na daga suka yi amfani da rubutun, hanyar, da wanda ya kamata AF. An yi amfani da rubutunai na idon daidai yana samiwa masu amfani da wannan rubutunai.

Yadda za'a zuba abincin: Yadda za'a zuba abincin ya kawo kamera ya taimaka da ya gabatar da abinci mai tsallakawa, kamar yanzu kuma kuma abinci ya baya da aka gabatar. Wannan ya saukar daidai ga user don amfani da sabon fayil.

Fokusin Gaba: Algoritam mai shirin ya fi ma'anin gaba da ya gabatar da gaba mai abin da ya kamata da wannan, don ya fara da gaban jikinsu aiki. Kuma ya ta'adda don portaits.

Fokusin Labari: Ya kawo amfani da labari mai AF don amfani da labari da aka gabatar don amfani da rubutunai na labari daidai da wadannan scene, kuma ya ta'adda don rubutunai na landaikan da makiyan da aka gabatar da labari.

Rubutunku don amfani da AF

Don gaba daidai a cikin amfani da performance ta systeman autofocus, mutane ake son saita suna kuna kan techniques don suka yi imaging tambaya da wuce.

1. Bincika mode ya focus na gaba
2. Amfani da feature na jinsi mai gabatarwa - Multi-point focusing.
3. Amfani da focus lock
4. Daidaita hankali hankali
5. Amfani da Predictive Focus

Da fatan da rubutu na wannan, kana amfani da systeman autofocus bincika da ke yi imaging hanyar wuce.

Kuma tabbatar da yanzu, idan kuna aka makashewa koma shigar da masu samunna , Sinoseen, don labari. Sinoseen ya kasance 10 saduwar tafiya a cikin application daga embedded vision, da ke sabunta sabon fahimta a cikin systeman autofocus, da ke develop da kowane modules kameras na autofocus don industries daidai, don kuma zanace su ne karatu. Sinoseen ya kasance 10 saduwar tafiya a cikin application daga embedded vision da ke develop da kowane modules kameras na autofocus don industries daidai.