isiZulu
I-Rolling Shutter vs Global Shutter kuzeMidlalo Analytics: Yikuphi Okufanele Ukuhlaziywa Kokusebenza Kwakho?
Kwadalwa ngo 01.16
Emhlabeni osheshayo wezokuhlaziya ezemidlalo, wonke umphumela wesibili kanye ne-pixel ngayinye ibalulekile. Abaphathi, abahlaziyi, kanye nabathuthukisi bokusebenza bathembele kudatha yevidiyo esezingeni eliphezulu ukuze bahlaziye ukuhamba kwabathakathi, baphucule amasu, futhi bathole ithuba lokuncintisana. Kodwa ngemuva kwezithombe ezicacile kanye nemibono esebenziseka, kukhona ukukhetha okubalulekile kwezobuchwepheshe: i-rolling shutter noma i-global shutter?
Nakuba zombili izinhlobo ze-shutter zithatha ulwazi olubonakalayo, umehluko obalulekile ungakha noma uphule ukunemba kwezibalo zezemidlalo—kungakhathaliseki ukuthi ulandelela ubude besinyathelo somgijimi, ukulawula ibhola komdlali webhola likanobhutshuzwayo, noma ukuphakama kokugxuma komdlali webhola likanobhutshuzwayo. Kulo mhlahlandlela, sizodlula kwezichazamazwi zobuchwepheshe eziyisisekelo ukuze sihlolisise ukuthi i-rolling shutter ne-global shutter zithinta kanjani izimo zokuhlaziya ezemidlalo emhlabeni wangempela. Sizokusiza futhi ukuthi unqume ukuthi yikuphi okuhambisana nezinjongo zakho ezithile zokuhlaziya, isabelomali, kanye nokuhlelwa kwemishini yakho.
Okokuqala: Iziqalo—I-Rolling Shutter vs I-Global Shutter Ichazwe Kalula
Ngaphambi kokungena ezimweni ezithile zezemidlalo, ake sikhanyise umehluko oyinhloko phakathi kwalezi zimbili zobuchwepheshe be-shutter. Zombili zisetshenziswa kumasensori wezithombe (amasensori e-CMOS, ajwayelekile kakhulu kumakhamera ezemidlalo zanamuhla) ukuze ziguqule ukukhanya kube idatha yedijithali, kodwa zihluke ngendlela ezithatha ngayo ama-pixel phezu kwesensori.
Iyini i-Rolling Shutter?
I-rolling shutter ithwebula isithombe ngendlela elandelanayo, “umugqa-ngomugqa”. Cabanga upenda isithombe kusukela phezulu kuye phansi, ucezu olulodwa ngesikhathi—yile ndlela i-rolling shutter esebenza ngayo. I-sensor ihlola indawo umugqa ngomugqa (kungaba ngokuvundlile noma ngokwehlisa) isikhathi esifushane, kunokuba ithwebule ifremu yonke ngesikhathi esisodwa.
Lokhu kuhlola okulandelanayo yikho okwenza i-rolling shutter ivame ukutholakala kumakhamera ajwayelekile, amakhamera ezenzo (njenge-GoPros yokuqala), namanye amakhamera ezemidlalo aphakathi. Kuncane ukukhiqiza, kusebenzisa amandla amancane, futhi kuvumela ukulungiswa okuphezulu namazinga amafreyimu kumadivayisi amancane. Kodwa-ke, lokhu kubambezeleka phakathi kokuhlola umugqa wokuqala nowokugcina we-sensor kudala isici sayo esikhulu esibi: ukuhlanekezelwa kwe-rolling shutter (okubizwa nangokuthi “umphumela we-jello”).
Yini i-Global Shutter?
I-Global shutter, ngokungafani, ithwebula ifremu yonke ngesikhathi esisodwa. Cabanga ngayo njengokuthatha isithombe ngekhamera yefilimu yakudala—yonke ipikseli esenzweni irekhoda ukukhanya ngesomzuzwana ofanayo. Ukuthwebula okufanayo kususa ukubambezeleka phakathi kokuskena izingxenye ezahlukene zesenzwa, kwenza i-global shutter ifanele ukuthwebula izinto ezihamba ngokushesha ngaphandle kokuhlanekezela.
I-Global shutter ijwayelekile kumakhamera ezemidlalo asezingeni eliphezulu, amakhamera asheshayo, nemishini yokuthwebula izithombe yezimboni. Ibiza kakhulu futhi idla amandla kune-rolling shutter, kodwa ikhono layo lokumisa ukunyakaza ngokunembayo kuyenza ibe yisisekelo ezinhlelweni lapho ukunemba kungadingekile. Ezokuhlaziywa kwezemidlalo, ukunemba lokhu kudlulisela ngqo kudatha ethembekile ngokunyakaza kwabadlali.
Kungani Uhlobo Lwe-Shutter Lubalulekile Ezokuhlaziywa Kwezemidlalo
Ezokuhlaziywa kwezemidlalo zincike ekukaleni nasekuchazeni ukunyakaza okunamandla—abadlali abagijima ngo-20 mph, amabhola ebhola ahamba ngo-60 mph, noma abagijimi abenza ama-flips ayinkimbinkimbi. Noma yikuphi ukuhlanekezela okuncane noma iphutha lesikhathi kungahlanekezela izilinganiso ezibalulekile: imvamisa yesinyathelo, umzila webhola, isikhathi sokuxhumana, noma ukuphakama kokugxuma.
I-rolling shutter ne-global shutter ziphathe izenzo ezishukumayo ngendlela ehlukile kakhulu. Ake sihlaziye umthelela wazo ezimeni ezintathu ezibalulekile zokuhlaziya ezemidlalo: ukuthwebula izithombe ezisheshayo, ukuhlaziya isu leqembu, kanye ne-biomechanics yomdlali eseduze.
1. Ukuthwebula Izithombe Ezisheshayo: Umphumela we-Jello vs. Izithombe Eziqhakazile
Ezemidlalo ezisheshayo—njengokugijima, umjaho, noma i-ice hockey—zicindezela imingcele yobuchwepheshe bekhamera. Lapho umdlali noma into ihamba ngokushesha esikrinini, ukuskena okulandelanayo kwe-rolling shutter kudala ukuhlanekezela okubonakalayo. Ngokwesibonelo:
• Imilenze yomgijimi ibonakala igobile noma yelulekile ngokungajwayelekile esikrinini.
• Ibhola likanobhutshuzwayo libukeka lilude esikhundleni sokuba libe yindilinga ngesikhathi sokukhahlela.
• Amasondo omuntu ohamba ngebhayisikili ayagoba abe yisimo esithi “ibhanana” kumavidiyo.
Le "jello effect" ayiyona nje into ebukwayo - iyisibulala-datha. Uma isoftware yakho yezibalo ikala i-engile yedolo lomgijimi ekunwetshweni okukhulu, ifreyimu ehlanekezelwe izonikeza ukufundwa okungalungile. Abaqeqeshi bangase basekele izinguquko zokuqeqesha kudatha enesici, okuholela ekuzilolongeni okungasebenzi kahle noma ngisho nasezingozini zokulimala.
Ishutter ye-Global ikhipha le nkinga ngokuphelele. Ngokuthwebula isithombe sonke ngasikhathi sinye, iqinisekisa ukujikeleza okusheshayo ngokunembile. I-angle leg ye-sprinter, indlela ye-ball, noma isikhungo somzimba somgibeli konke kubhalwe njengoba kukhona, kuqinisekisa ukuthi isoftware yakho yokuhlaziya ikhiqiza izilinganiso ezithembekile.
Isibonelo Sokusebenzisa: Umqeqeshi wezokugijima noMhlaba uhlaziya ukuqala kwe-sprinter ye-100m. Nge-global shutter, bangakwazi ukukala kahle isikhathi phakathi kwegunu kanye nesinyathelo sokuqala se-sprinter, kanye ne-angle ye-hip zabo nezinyawo ngesikhathi sokukhuphuka. Nge-rolling shutter, umzimba we-sprinter ungase ube nezehlakalo, okwenza kube nzima ukuthola izilinganiso ze-angle ezinembile.
2. Ukuhlaziywa Kweqembu: Ukusebenza Okuhambisanayo vs. Ukuhamba Kwezikhathi
Imidlalo yeqembu efana nebhola, ibhaskethi, kanye nerugby idinga ukuhlaziywa kokusebenza okuhambisanayo—abadlali abaningi behamba ngokuhambisana nomunye nomunye kanye nebhola. Isibonelo, umhlaziyi webhola angase afune ukulandela izikhundla zabadlali abangu-10 kanye nebhola ngaleso sikhathi esiqondile lapho kudlalwa khona ukudlulisela ukuze ahlaziye isikhala nezikhala zokuvikela.
Ukukhanya kwe-rolling shutter kokuhlola okwenziwa ngokulandelana kudala ukulibaziseka okuncane kodwa okuthinta isikhathi phakathi kwefremu. Ingxenye ephezulu ye-fremu ibanjwa emizuzwini embalwa ngaphambi kokuthi ingxenye ephansi ibanjwe, okusho ukuthi izikhundla zabagibeli ezindaweni ezahlukene ze-fremu azihambisani ngempela. Emjimini osheshayo njengebhola, noma ukulibaziseka okungu-5ms kungaholela ekwephuleni isikhundla esingu-10cm kumgibeli ogibela ngo-20 mph.
Lokhu kulibaziseka kwesikhathi kungaphambanisa izilinganiso zamasu ezifana: ibanga phakathi kwabahlaseli nabavikeli ngesikhathi sokudlulisela; isikhathi sokuphathwa kwebhola (uma isikhundla sebholi sithathe isikhathi esincane ukuhamba uma kuqhathaniswa nabadlali); kanye nezindlela zokuhamba (isb., ukuthi umphakathi usemkhakheni ofanele ukuthola ibhola elihambayo).
Ukuthwebula okufanayo kwe-global shutter kuqinisekisa ukuthi into ngayinye esithombeni—kungaba umdlali phezulu esikrinini noma ibhola phansi—irekhodwa ngesikhathi esisodwa. Lokhu kuvumelanisa kubalulekile ekwakheni amamephu okushisa anembayo, ukulandelela izindlela abadlali abahamba ngazo, nokuhlola amasu eqembu.
Isibonelo Sokusebenzisa: Umhlaziyi webasketball ofunda ukuhlasela okusheshayo. Nge-global shutter, angabona ngokunembayo izindawo zabo bonke abadlali abahlanu abahlaselayo nabavikela lapho iphoyinti lomdlali liwela isigamu senkundla, okubavumela ukuthi babone ukuthi iqembu liyakha yini isikhala esifanele sokudlala i-layup. Nge-rolling shutter, abadlali abaphansi kwesikrini bangase babonakale bengemuva kancane esenzweni, okuholela umhlaziyi ukuthi angakwazi ukuhlola kahle isikhala.
3. Ukuhlaziywa kwe-Biomechanical: Ama-engeli we-Joint anembayo ngokumelene nokunyakaza okuhlanekelwe
Ukuhlaziywa kwe-biomechanical—ukufunda ukuhamba komjaho ukuze kugwenywe ukulimala nokuthuthukiswa kokusebenza—kuncike ekukaleni okukhulu kokunemba kwezikhala zamajoyinti, ukuvuselelwa kwemisipha, nokufakwa kwamandla. Isibonelo, umqeqeshi we-golf angahlaziya ukuhamba komjaho ukuze alungise i-wrist angle enezinkinga edala ubuhlungu bemuva, noma umqeqeshi we-volleyball angafunda ukuhamba komjaho ukuze athuthukise ukuphakama kokugxuma.
Ukuphazamiseka kwe-rolling shutter kubalulekile lapha. Ngisho nokuphambuka okuncane komzimba womjaho kungaholela eziphambukweni ezinkulu ekubalwa kwezikhala zamajoyinti. Iphutha elingu-5 degrees ekukaleni kwesikhala sekhanda ngesikhathi sokuhlala, isibonelo, lingaholela eziphakamweni ezingalungile zokuqeqesha ezandisa ingozi yokulimala kwe-ACL.
Ukuthwebula okungaphazamiseki kwe-global shutter kubalulekile ukuze kutholakale idatha ye-biomechanical ethembekile. Lokhu kuvumela abahlaziyi ukuba balandele kahle isikhundla samamaki (ama-sticker amancane abekwe emzimbeni womjaho) ngaphakathi kwesithombe, kuqinisekisa ukubalwa okunembile kwezikhala zamajoyinti nezindlela zokunyakaza.
Isibonelo Sokusebenzisa: Umelaphi womzimba osebenza nomdlali wethenisi olulama ekulimaleni kwehlombe. Basebenzisa ividiyo ukuhlaziya isevisi yomdlali, begxile engela yehlombe ngesikhathi sokubuyela emuva. Ngama-global shutter, bangathola isilinganiso esiqondile sobubanzi bokunyakaza kwehlombe, baqinisekise ukuthi umdlali akadluli emikhawulweni ngesikhathi sokululama. Ngama-rolling shutter, ihlombe lingabonakala liyihlonga, okuholela umelaphi ukuthi angalungile isilinganiso sobubanzi bokunyakaza futhi adale uhlelo lokubuyiselwa emsebenzini olungasebenzi.
I-Rolling Shutter vs. I-Global Shutter: Izivumelwano Ezibalulekile Zokuhlaziywa Kwezemidlalo
Ngenkathi i-global shutter ingcono kakhulu ekuhlaziyeni kwezemidlalo okunembayo, ayihlali iyikhetho elisebenzayo. Kunezinto ezibalulekile okufanele uzicabangele, ikakhulukazi uma kukhulunywa ngesabelomali, usayizi wezinto zokusebenza, kanye nokusetshenziswa kwamandla. Ake sifingqe izinzuzo nezingalungi zazo zonke izimo zokusebenzisa ezemidlalo:
Isici | Rolling Shutter | Global Shutter |
Isici | Rolling Shutter | Global Shutter |
Ukuphazamiseka kokunyakaza | Kuphezulu (umphumela we-jello) ngokunyakaza okusheshayo | Akukho—ukuthwebula okungenasiphazamiso |
Ukunemba kwedatha | Kuncane kuye kulinganiselwe (kufanelekele ukuhlaziya okuyisisekelo) | Kuphezulu (kufanelekele i-biomechanics namamethrikhi okunemba) |
Intengo | Kuncane—kufikeleleka kumakhamera abasebenzisi nawaphakathi | Kuphezulu—imishini yobungcweti ibiza kakhulu |
Usayizi wemishini | Kuncane—kungena kumakhamera esenzo, ama-smartphone, namakhamera ahlanganisiwe | Kukhulu—amakhamera obungcweti ayasinda (nakuba kukhona izinketho ezincane ezivela) |
Ukusebenzisa amandla | Phansi—kulungele ukurekhoda isikhathi eside (isb., imidlalo yebhola eligcwele) | Phezulu—kudinga amandla engeziwe, kukhawula impilo yebhethri ukusetshenziswa okuphathekayo |
Isivinini Sokudubula/Isinqumo | Kuphezulu—kungabamba isinqumo se-4K ku-60fps noma ngaphezulu kumadivayisi amancane | Kusukela kokumaphakathi kuye kokuphezulu—amakhamera ochwepheshe ahlinzeka ngamafreyimu aphezulu, kodwa ngentengo ephakeme |
Yiluphi Uhlobo Lwe-Shutter Okufanele Ulukhethe ku-Sports Analytics Yakho?
Impendulo incike ezinhlosweni zakho ze-analytics kanye nesabelomali. Nansi imininingwane ecacile ukukusiza unqume:
Khetha i-Rolling Shutter Uma:
• Wenza izibalo eziyisisekelo (isibonelo, ukulandelela amaphethini okuhamba ajwayelekile, ukubala ukudlula, noma ukubuyekeza ifilimu yomdlalo ukuze uthole impendulo yokuqeqesha) lapho ukuhlanekezela okuncane kungathinti iziphetho zakho.
• Isabelo-mali siyisithiyo esikhulu - usebenzisa amakhamera ezinga labathengi (isibonelo, ama-smartphone, amakhamera esenzo) noma amakhamera aphakathi.
• Udinga ukuqopha okuphathwayo, okude isikhathi (isb., ukuhlela umjaho wonke we-marathon noma umdlalo wombhoxo) lapho impilo yebhethri nosayizi wezinsiza kubalulekile.
Ithiphu yePro kubasebenzisi beRolling Shutter: Nciphisa ukungahambi kahle ngokubeka ikhamera ngendlela yokuthi abadlali abahamba ngokushesha noma izinto zihambe ziqondile emkhakheni wokuhlola wesensor (ngokuvamile okuhamba phezulu). Gwema ukuthwebula ezikhungweni lapho ukuhamba kuphakathi kokuhlola (isb., umgibeli ophakeme ohamba ngqo phambili noma emuva kwekhamera).
Khetha iGlobal Shutter Uma:
• Uwenza ukuhlaziywa okunembile (isb., ukuhlaziywa kwe-biomechanical, ukuthwebula ukuhamba okusheshayo, noma ukuhlaziywa kwecebo okudingayo izikhundla ezihambisanayo zomgibeli/ibhola).
• Ukunembileku akuvunyelwe—isb., usebenza nabagibeli abaqeqeshiwe, odokotela bezemidlalo, noma ososayensi bezemidlalo abathembela kudatha ukwenza izinqumo zokuqeqesha noma zokubuyisela emuva emathuneni.
• Unesabelomali semishini yobungcweti (isibonelo, amakhamera asheshayo, amakhamera e-CMOS ezimboni anezinzwa ze-global shutter).
Ithiphu Elibalulekile Kubasebenzisi Be-Global Shutter: Tshalani emakhamereni anezinga eliphezulu lezithombe ngomzuzwana (120fps noma ngaphezulu) ukuze nithwebule ukunyakaza okusheshayo kakhulu (isibonelo, ukujikijela ibhola le-baseball noma ukugingqika komgymnasi). Le ngxubevange ye-global shutter namazinga aphezulu ezithombe izokunikeza idatha enemininingwane kakhulu, enembayo.
Ikusasa Lobuchwepheshe Be-Shutter Kwezokuhlaziya Ezemidlalo
Njengoba ezokuhlaziya ezemidlalo ziba ngobuchwepheshe obuphezulu, isidingo samakhamera e-global shutter anembayo, athengekayo siyakhula. Abakhiqizi sebevele bathuthukisa izinzwa ezincane, ezisebenzisa amandla amancane e-global shutter ezihlanganisa isikhala phakathi kwemishini yobungcweti nemishini yabasebenzisi. Ngokwesibonelo, amanye amakhamera esenzo amasha nama-smartphone manje ahlinzeka ngezi "zindlela ze-global shutter" zokunciphisa ukuhlanekezela ezindaweni ezihamba ngokushesha.
Ngaphezu kwalokho, amathuluzi okucubungula ngemva kokusebenza anikwe amandla yi-AI ayavela angakwazi ukulungisa ukungahambi kahle kwe-rolling shutter ekukhiqizeni. Nakuba lawa mathuluzi engawona amahle (awakwazi ukubuyisela idatha elahlekile ngokuphelele), ayathuthuka ngokushesha futhi anikeza isixazululo esingabizi kubasebenzisi abangakwazi ukukhokhela amakhamera e-global shutter kodwa badinga idatha enembile kakhulu kunalokho okukhishwe yi-rolling shutter ejwayelekile.
Imicabango Yokugcina: Ungavumeli Uhlobo Lwe-Shutter Lukhawulelwe I-Analytics Yakho
I-rolling shutter ne-global shutter zombili zinomsebenzi wazo ekuhlaziyeni ezemidlalo, kodwa ukuqonda umehluko wazo kubalulekile ukuze uthole idatha ethembekile. Ukuze uthole ukuqeqeshwa okuyisisekelo nokulandelela ukunyakaza okujwayelekile, i-rolling shutter iyindlela esebenzayo, engabizi kakhulu—ikakhulukazi uma ulandela izindlela ezingcono kakhulu ukunciphisa ukuhlanekaniswa. Ukuze uthole i-biomechanics enembayo, ukuthwebula ukunyakaza okusheshayo, nokuhlaziywa kwezobunhloli okuthuthukile, i-global shutter ifanele ukutshalwa kwezimali.
Ekugcineni, uhlobo olungcono kakhulu lwe-shutter yilowo ohambisana nemigomo yakho: uma wenza izinqumo ezithinta ukusebenza noma ukuphepha komdlali, ukunemba kufanele kube yinto ebaluleke kakhulu kuwe. Uma uqala nje ukuhlaziya ezemidlalo, i-rolling shutter ingakusiza ukuthi wakhe amakhono akho ngaphambi kokuthuthukisa izinto ze-global shutter.
Kungakhathaliseki ukuthi ukhetha yiphi, khumbula ukuthi ukubekwa kwekhamera, ukukhanyisa, kanye ne-frame rate nazo zidlala izindima ezibalulekile ekuqinisweni kwedatha yakho yokuhlaziya. Hlanganisa uhlobo olufanele lwe-shutter nokulungiswa okufanele, futhi uzobe usendleleni yakho yokuthola imininingwane ewusizo enikeza iqembu lakho noma abadlali bakho inzuzo yokuncintisana.
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