Yini aI-Fisheye Lens?Ilensi ye-fisheye iwuhlobo lwelensi yekhamera eklanyelwe ukudala umbono obanzi wesigcawu, ngokuhlanekezela okubonakalayo okunamandla kakhulu nokuhlukile.Amalensi e-Fisheye angathwebula indawo yokubuka ebanzi kakhulu, ngokuvamile efika ku-180 degrees noma ngaphezulu, okuvumela umthwebuli wezithombe ukuthi athwebule indawo enkulu kakhulu yesigameko ngeshothi eyodwa.

Ilensi ye-fisheye

Amalensi e-Fisheye aqanjwe ngomphumela wawo ohlukile wokuhlanekezela, odala isithombe esiyindilinga noma esimise okomgqomo esingaba ihaba futhi senziwe isitayela.Umphumela wokuhlanekezela ubangelwa indlela i-lens eyenza ngayo ukukhanya njengoba idlula ezintweni zengilazi ezigobile zelensi.Lo mphumela ungasetshenziswa ngobuhlakani abathwebuli bezithombe ukuze bakhe izithombe ezihlukile neziguqukayo, kodwa futhi kungaba umkhawulo uma kufunwa isithombe esibukeka ngokwemvelo.

Amalensi e-Fisheye eza ngezinhlobo eziningana ezihlukene, okuhlanganisa amalensi e-fisheye ayindilinga, amalensi e-fisheye ayindilinga, kanye namalensi efisheye anohlaka olugcwele.Ngayinye yalezi zinhlobo zamalensi e-fisheye inezici zayo ezihlukile futhi ifanele izinhlobo ezahlukene zezithombe.

Ngokungafani namalensi e-rectilinear,amalensi ezinhlanziazibonakali ngokugcwele ngobude bokugxila nokuvuleka kukodwa.I-engeli yokubuka, ububanzi besithombe, uhlobo lokuqagela, nokumbozwa kwenzwa konke kuyahlukahluka ngaphandle kwalokhu.

Izinhlobo zokusebenzisa ifomethi

Amalensi e-fisheye ayindilinga

Uhlobo lokuqala lwamalensi e-fishsheye athuthukisiwe kwakungamalensi “ayisiyingi” angakha isithombe esiyindilinga esinomkhakha wokubuka ongu-180-degree.Zinobude bokugxila obufushane kakhulu, ngokuvamile obusuka ku-7mm ukuya ku-10mm, okubenza bakwazi ukuthwebula umbono obanzi kakhulu wendawo yesehlakalo.

Zungeza ilensi yefishi

Amalensi e-fisheye ayindilinga aklanyelwe ukukhiqiza isithombe esiyindilinga kunzwa yekhamera noma endizeni yefilimu.Lokhu kusho ukuthi isithombe esiwumphumela sinesimo esiyindilinga esinemingcele emnyama ezungeze indawo eyindilinga, okwenza umphumela oyingqayizivele "we-fishbowl".Amakhona esithombe se-fisheye esiyindilinga azoba mnyama ngokuphelele.Lobu bumnyama buhlukile ekukhanyeni kancane kancane kwamalensi ama-rectilinear futhi kuqalisa kungazelelwe.Isithombe esiyindilinga singasetshenziswa ukudala izingoma ezithokozisayo nezokudala.Lezi zine-engeli yokubuka engu-180° eqondile, evundlile kanye ne-diagonal.Kodwa futhi kungaba umkhawulo uma umthwebuli wezithombe efuna i-aspect ratio engunxande.

Isiyingiamalensi ezinhlanzizivame ukusetshenziswa ezithombeni zobuciko nezobuciko, njengokuthwebula kwezakhiwo, ukuthwebula izithombe ezingabonakali, kanye nezithombe zezemidlalo ezeqisayo.Angaphinde asetshenziselwe izinhlelo zokusebenza zesayensi nezobuchwepheshe lapho kudingeka khona ukubuka okubanzi, njenge-astronomy noma i-microscopy.

Amalensi e-diagonal fisheye (aka uhlaka olugcwele noma unxande)

Njengoba amalensi efisheye ethola ukuduma ekuthwebuleni izithombe okuvamile, izinkampani zamakhamera zaqala ukukhiqiza amalensi efisheye anendingilizi yesithombe enwetshiwe ukuze amboze lonke uhlaka lwefilimu elingunxande.Abizwa ngokuthi ama-diagonal, noma ngezinye izikhathi "unxande" noma "uhlaka olugcwele", amehlo ezinhlanzi.

Amalensi e-diagonal fisheye awuhlobo lwelensi ye-fisheye engakha ukubuka kwe-ultra-wide-engeli yendawo yesehlakalo enomkhakha wokubuka we-diagonal we-180 kuya ku-190 degrees, kuyilapho ama-engeli avundlile name mpo azoba mancane.Lawa ma-lens akhiqiza umbono ohlanekezelwe kakhulu futhi onehaba, kodwa ngokungafani namalensi e-fisheye ayindilinga, agcwalisa lonke uhlaka oluwunxande lwenzwa yekhamera noma indiza yefilimu.Ukuze uthole umphumela ofanayo kumakhamera edijithali anezinzwa ezincane, ubude bokugxila obufushane buyadingeka.

Umthelela wokuhlanekezela we-diagonali-fisheye lensidala ukubukeka okuyingqayizivele nokumangalisayo okungasetshenziswa ngobuhlakani abathwebuli bezithombe ukuze kuthwebule izithombe eziguqukayo nezidonsa amehlo.Umbono oyihaba ungakha umuzwa wokujula nokunyakaza endaweni yesehlakalo, futhi ungasetshenziswa ukudala izingoma ezingabonakali neze-surreal.

Ilensi ye-diagonal fisheye

I-Portrait noma amalensi e-fisheye ayindilinga

Umbuthano onqanyuliweamalensi ezinhlanziolunye uhlobo lwelensi ye-fisheye ekhona, ngaphezu kwe-fisheye eyindilinga kanye namalensi e-fisheye anefreyimu egcwele engikhulume ngayo ekuqaleni.Indawo emaphakathi phakathi kwe-diagonal kanye neso lenhlanzi eliyindilinga iqukethe isithombe esiyindilinga esilungiselelwe ububanzi befomethi yefilimu kunobude.Njengomphumela, kunoma iyiphi ifomethi yefilimu engesona isikwele, isithombe esiyindilinga sizonqampunwa phezulu nangaphansi, kodwa sisabonise imiphetho emnyama kwesokunxele nakwesokudla.Le fomethi ibizwa ngokuthi "i-portrait" fisheye.

Ilensi ye-fisheye eyindilinga

Lawa ma-lens ngokuvamile anobude bokugxila obungafinyelela ku-10-13mm kanye nenkundla yokubuka ecishe ibe ngu-180 degrees kukhamera yenzwa yokusika.

Amalensi e-cropped-circle eye-fisheye ayinketho ethengekayo uma kuqhathaniswa namalensi e-fisheye anohlaka olugcwele, futhi anikeza umbono ohlukile onomphumela wokuhlanekezela okuyindilinga.

Amalensi e-fisheye amancane

Amakhamera edijithali amancane, ikakhulukazi uma esetshenziswa njengamakhamera okuvikela, avamise ukuba namalensi e-fisheye ukuze akhulise ukumboza.Amalensi e-fisheye amancane, afana namalensi e-fisheye e-M12 kanye namalensi e-fisheye e-M8, adizayinelwe izinzwa zefomethi encane yezithombe ezivame ukusetshenziswa kumakhamera okuphepha.Osayizi abasetshenziswayo befomethi yenzwa yesithombe abadumile bahlanganisa 1⁄4″, 1⁄3″, kanye no-1⁄2″ .Ngokuya ngendawo esebenzayo yenzwa yesithombe, ilensi efanayo ingenza isithombe esiyindilinga kunzwa yesithombe enkudlwana (isb. 1⁄2″), kanye nohlaka olugcwele kwencane (isb. 1⁄4″).

Izithombe eziyisampula ezithwetshulwe yi-CHANCCTV's M12amalensi ezinhlanzi:

Izithombe eziyisampula ezithwetshulwe yi-CHANCCTV's M12 fisheye lens-01

Izithombe eziyisampula ezithwetshulwe yi-CHANCCTV's M12 fisheye lens-02

Izithombe eziyisampula ezithwetshulwe yi-CHANCCTV's M12 fisheye lens-03