Molweni nonke.
Ndakhuthazwa ukuba ndibhale eli nqaku lifutshane ngengxabano malunga nokukhethwa kweTV.
Ngoku kule ndawo - kunye nakwi "megapixels yeekhamera" - kukho i-bacchanalia yokuthengisa ekufuneni izisombululo: I-HD Ready sele ithathelwe indawo yi-Full HD, kunye ne-4K kunye ne-8K sele ithandwa kakhulu.
Masiyiqonde - yintoni esiyifunayo ngokwenene?
Ikhosi yejiyometri yesikolo kunye nolwazi olusisiseko oluvela kwiWikipedia luya kusinceda kule nto.
Ngoko, ngokutsho , iliso lomntu oqhelekileyo sisixhobo esikhethekileyo esikwaziyo ukujonga ngaxeshanye indawo kwi-engile ye-130 Β° -160 Β°, kunye nezinto ezihlukeneyo kwi-engile ye-1-2β² (malunga ne-0,02 Β° -0,03 Β°) . Apho Ukugxila ngokukhawuleza kwenzeka kumgama we-10 cm (abantu abancinci) - 50 cm (uninzi lwabantu abaneminyaka engama-50 nangaphezulu) ukuya kwi-infinity.
Kubonakala kupholile. Enyanisweni, akukho lula ngolo hlobo.
Ngezantsi intsimi yokujonga iliso lasekunene lomntu (ikhadi le-perimetric, amanani kwisikali ngamadigri angama-angular).
Indawo e-orenji yindawo ebonisa i-fundus eyimfama. Intsimi yombono weso ayinayo imilo yesangqa esiqhelekileyo, ngenxa yokunciphisa ukujonga ngempumlo kwicala eliphakathi kunye neenkophe ngaphezulu nangaphantsi.
Ukuba siphakamisa umfanekiso wamehlo asekunene nasekhohlo, sifumana into enje:
Ngelishwa, iliso lomntu aliboneleli ngomgangatho ofanayo wombono kuyo yonke indiza kwi-angle ebanzi. Ewe, ngamehlo amabini siyakwazi ukubona izinto ezingaphakathi kwe-180 Β° phambi kwethu, kodwa sinokuzibona njenge-dimensional ezintathu kuphela ngaphakathi kwe-110 Β° (ukuya kwindawo eluhlaza), kwaye njengombala ogcweleyo - ngokulinganayo. uluhlu oluncinci malunga ne-60 Β° -70 Β° (ukuya kwindawo eluhlaza okwesibhakabhaka). Ewe, ezinye iintaka zinombono ophantse ube ngu-360Β°, kodwa sinayo into esinayo.
Ngaloo ndlela sifumana oko umntu ufumana umfanekiso ophakamileyo womgangatho kwi-angle yokujonga malunga ne-60 Β° -70 Β°. Ukuba ukhuselo olukhulu luyafuneka, siyanyanzeleka ukuba "siqhube" amehlo ethu emfanekisweni.
Ngoku - malunga neeTV. Ngokungagqibekanga, qwalasela iiTV ezinomlinganiselo odumileyo wobubanzi ukuya kubude njenge-16:9, kunye nescreen esicaba.
Oko kukuthi, kuvela ukuba W: L = 16:9, kunye no-D yi-diagonal yesikrini.
Ke ngoko, ukukhumbula uMthetho wePythagorean:
Ke, kucingwa ukuba isisombululo sithi:
- HD Ready 1280x720 pixels
- IHD epheleleyo ineepikseli eziyi-1920x1080
- I-Ultra HD 4K ineepixels ezingama-3840x2160,
sifumanisa ukuba icala le-pixel li:
- I-HD ilungile: D/720,88
- I-HD epheleleyo: D/2202,91
- I-Ultra HD 4K: D/4405,81
Ukubalwa kwala maxabiso kunokufumaneka apha
Ngoku makhe sibale umgama ofanelekileyo kwiscreen ukuze iliso ligubungele wonke umfanekiso.
Ukusuka kumfanekiso kucacile ukuba
Ekubeni iparameter enkulu yobude kunye nobubanzi bomfanekiso bububanzi - kwaye iliso lifuna ukugubungela ububanzi bonke besikrini - masibale umgama ofanelekileyo kwisikrini, sithathela ingqalelo ukuba, njengoko kubonisiwe ngasentla, i-angle yokubukela. akufunekanga idlule i-70 degrees:
Yiyo i: Ukuze iliso ligqume bonke ububanzi beskrini, kufuneka sibe kumgama ungasondeli ngaphezu kwesiqingatha sediagonal yesikrini.. Ngaphezu koko, lo mgama kufuneka ubuncinci ube yi-50 cm ukuqinisekisa ukugxila okukhululekile kubantu bayo nayiphi na iminyaka. Masikhumbule oku.
Ngoku makhe sibale umgama apho umntu aya kwahlula iipikseli kwiscreen. Lo ngunxantathu ofanayo kunye ne-tangent ye-engile, ngu-R kuphela kulo mzekelo ubungakanani bepixel:
Oko kukuthi: kumgama omkhulu kunobukhulu beepikseli ezingama-2873,6, iliso aliyi kubona iinkozo. Oku kuthetha ukuba, kuthathelwa ingqalelo ukubalwa kwecala le-pixel elingasentla, kufuneka ube kulo mgama usezantsi ulandelayo ukusuka kwesikrini ukuze umfanekiso ube wesiqhelo:
- I-HD ilungile: D/720,88 x 2873,6 = 4D, oko kukuthi, iidiagonal ezine zesikrini
- I-HD epheleleyo: D/2202,91 x 2873,6 = 1,3D, oko kukuthi, malunga nediagonal yesikrini esinesiqingatha esingaphantsi kancinci
- I-Ultra HD 4K: D/4405,81 x 2873,6 = 0,65D, oko kukuthi, ngaphezu kwesiqingatha sesikrini sediagonal
Kwaye ngoku konke okukhokelela kuyo-
Izigqibo:
- Akufanele uhlale kufuphi ne-50 cm kwisikrini - iliso aliyi kukwazi ukugxila kumfanekiso ngokuqhelekileyo.
- Akufunekanga uhlale kufutshane ne-0,63 ye-diagonal yesikrini - amehlo akho aya kudinwa kuba kuya kufuneka ajikeleze umfanekiso.
- Ukuba uceba ukubukela iTV kumgama omkhulu kune-diagonals ezine zesikrini, akufanele uthenge into epholileyo kune-HD Ready - awuyi kuwubona umahluko.
- Ukuba uceba ukubukela iTV kumgama ongaphezulu kwe-diagonal yesikrini enye enesiqingatha, akufuneki uthenge into epholileyo kune-Full HD - awuyi kuwubona umahluko.
- Ukusebenzisa i-4K kucetyiswa kuphela ukuba ujonga isikrini kumgama ongaphantsi kwe-diagonal enye enesiqingatha, kodwa ngaphezu kwesiqingatha se-diagonal. Mhlawumbi ezi luhlobo oluthile lweemonitha zokudlala zekhompyutha okanye iiphaneli ezinkulu, okanye isitulo esimi kufutshane nomabonwakude.
- Ukusebenzisa isisombululo esiphezulu akunangqiqo - mhlawumbi awuyi kubona umehluko kunye ne-4K, okanye uya kuba kufuphi kakhulu nesikrini kwaye i-angle yokujonga ayiyi kugubungela yonke indiza (jonga inqaku le-2 ngasentla). Ingxaki ingasonjululwa ngokuyinxenye ngesikrini esigobileyo - kodwa izibalo (ezintsonkothileyo ngakumbi) zibonisa ukuba le nzuzo iyathandabuzeka kakhulu.
Ngoku ndincoma ukulinganisa igumbi lakho, indawo yesofa oyithandayo, i-diagonal yeTV kunye nokucinga: ngaba kunengqiqo ukuhlawula ngaphezulu?
umthombo: www.habr.com