ISampuli yeChroma 4:4:4, 4:2:2 kunye ne-4:2:0
Ukhe wawabona amanani 4:4:4, 4:2:2 kunye 4:2:0 kunye nezinye iinguqulelo, ngaphezulu kungcono akunjalo?
Ukuqonda ukubaluleka kwezi zibizo, kufuneka wazi ukuba la manani athetha ntoni kwaye ayichaphazela njani ividiyo. Kweli nqaku siphelela kwi-4:4:4, 4:2:2 kunye ne-4:2:0 ikroma i-algorithms yesampulu.
Kule posi siza kugubungela:
Luma kunye Chroma
Umfanekiso wedijithali wenziwe pixels. Ipixel nganye inokukhanya kunye nombala. I-Luma imele ukucaca kwaye i-Chroma imele umbala. Ipixel nganye inexabiso layo leLuminance.
I-Subsampling isetyenziswa kwiChrominance ukusebenzisa inani ledatha kumfanekiso ngononophelo.
Uthatha iChroma yepixel enye ukubala ixabiso leepixels ezingabamelwane. Igridi isoloko isetyenziselwa oku eqala kwiindawo ezi-4 zokubhekisela.
Ifomyula yomlinganiselo we-Chroma subsampling
I-chroma subsampling iboniswe kwifomyula yomlinganiselo ilandelayo: J:a:b.
J= inani elipheleleyo leepixels kububanzi bepateni yebhloko yereferensi
a= inani leisampulu zechroma kumqolo wokuqala (phezulu).
b= inani leesampulu zechroma kumqolo wesibini (osezantsi).
Jonga lo mfanekiso ungezantsi nge-4:4:4 chroma subsampling
4:4:4
Kule matrix, ipixel nganye ineenkcukacha zayo zeChroma. I Codec ayifuni kuqikelela ukuba ixabiso le-Chroma kufuneka libe yintoni kuba irekhodwa kwi-pixel nganye.
Oku kunika owona mfanekiso ubalaseleyo, kodwa ubekelwe iikhamera ezikwelona candelo liphezulu kakhulu.
Ukuqalisa ngezakho iibhodi zamabali ezishukumayo
Bhalisa kwincwadana yethu kwaye ufumane ukhuphelo lwakho lwasimahla ngeebhodi zamabali amathathu. Qalisa ngokuzisa amabali akho ephila!
Siza kuyisebenzisa kuphela idilesi yemeyile yethu kwincwadana yethu kwaye siyihloniphe eyakho wabucala
4:2:2
Umqolo wokuqala ufumana isiqingatha solu lwazi kwaye kufuneka ubale intsalela. Umqolo wesibini nawo ufumana isiqingatha kwaye kufuneka ubale intsalela.
Kuba ii-codecs zinokwenza uqikelelo oluhle kakhulu, uya kubona phantse akukho mahluko ngomfanekiso we-4:4:4. Umzekelo odumileyo yiProRes 422.
4:2:0
Umqolo wokuqala weepikseli usafumana isiqingatha sedatha yeChroma, eyaneleyo. Kodwa umqolo wesibini awunalo kwaphela ulwazi lwayo, yonke into kufuneka ibalwe ngokusekelwe kwiipikseli ezijikelezileyo kunye nolwazi lokukhanya.
Ngethuba nje kukho ukuchasana okuncinci kunye nemigca ebukhali emfanekisweni, oku akuyona ingxaki, kodwa ukuba uya kuhlela umfanekiso kwi-post-production, ungangena kwiingxaki.
Ukuba ulwazi lweChroma lunyamalele kumfanekiso, awusokuze ulufumane kwakhona. Kuhlelo lombala, ii-pixels kufuneka "ziqikelele" kakhulu kangangokuba ipixels zenziwe ngamaxabiso angalunganga eChroma, okanye iipateni zokubhloka ezinemibala efanayo engahambelaniyo nenyani.
Nge Isitshixo seChroma kuba nzima kakhulu ukugcina imiphetho iqinile, singasathethi ke ngomsi kunye neenwele, idatha ilahlekile ukuqaphela imibala ngokuchanekileyo.
A 4:4:4 igridi ayisoloko iyimfuneko, kodwa ukuba ufuna ukuhlela umfanekiso kamva, kuyanceda ukuba nolwazi oluninzi kangangoko kunokwenzeka.
Sebenza ngeyona milinganiselo iphakamileyo yesampulu kangangexesha elide, kwaye uguqulele kuphela kwixabiso elisezantsi lesampulu ngaphambi kokupapashwa kokugqibela, umzekelo kwi-Intanethi.
Molo, ndinguKim, umama kunye nomthandi we-stop-motion onemvelaphi kwindalo yemidiya kunye nophuhliso lwewebhu. Ndinothando olukhulu lokuzoba kunye noopopayi, kwaye ngoku ndintywila kuqala kwihlabathi le-stop-motion. Ngebhlog yam, ndabelana nawe ngokufunda kwam.
