Amasu Okwenza Ingcweti Ukuchayeka Okulungile

Wake wabheka isikrini se-LCD sekhamera egumbini elikhanyayo futhi wacabanga ukuthi isithombe sifiphele kakhulu noma sidaluliwe kancane?Noma uke wabona isikrini esifanayo endaweni emnyama futhi wacabanga ukuthi isithombe sidalulwe ngokweqile?Okuxakayo ukuthi ngezinye izikhathi isithombe esiwumphumela asibi njalo lokho ocabanga ukuthi sizoba yikho.

"I-Exposure" ingelinye lamakhono abalulekile wokuthwebula amavidiyo.Nakuba abasebenzisi bangasebenzisa isofthiwe yokuhlela izithombe ukuze benze izinguquko ekukhiqizweni kwangemuva, ukuphatha ukuchayeka okulungile kungasiza umthwebuli wevidiyo ukuthi athole izithombe zekhwalithi ephezulu futhi agweme ukuchitha isikhathi esiningi ekukhiqizweni kwangemuva.Ukusiza abathwebuli bevidiyo ekugadeni ukuvezwa kwesithombe, ama-DSLR amaningi anemisebenzi eyakhelwe ngaphakathi yokuqapha ukuchayeka.Isibonelo, i-Histogram kanye ne-Waveform angamathuluzi awusizo wabathwebuli bevidiyo abangochwepheshe.Esihlokweni esilandelayo, sizokwethula imisebenzi ejwayelekile yokuthola ukuchayeka okulungile.

I-Histogram

I-Histogram Scope yenziwe nge-“X-axis” kanye “ne-eksisi ye-Y.”Ku-eksisi “X”, uhlangothi lwesobunxele lwegrafu lumelela ubumnyama, futhi uhlangothi lwesokudla lumelele ukukhanya.I-Y-axis imelela ukushuba kwephikseli okusatshalaliswe kuso sonke isithombe.Lapho inani eliphakeme liphakeme, kuba namaphikseli engeziwe enani elithile lokukhanya kanye nendawo enkulu ehlala kuyo.Uma uxhuma wonke amaphuzu enani lephikseli ku-eksisi engu-Y, kwakha Ububanzi obuqhubekayo be-Histogram.

Ngesithombe esivezwe ngokweqile, inani eliphakeme le-histogram lizogxiliswa ngakwesokudla kwe-eksisi engu-X;ngokuphambene, esithombeni esingavezwa ngaphansi, inani eliphakeme le-histogram lizogxiliswa ohlangothini lwesobunxele lwe-X-eksisi.Ukuze uthole isithombe esinokulinganisela kahle, inani eliphakeme le-histogram lisabalaliswa ngokulinganayo phakathi nendawo ye-X-eksisi, njengeshadi elivamile lokusabalalisa.Ngokusebenzisa i-Histogram Scope, umsebenzisi angakwazi ukuhlola ukuthi ukuchayeka kungaphakathi kokukhanya okuguquguqukayo okulungile nobubanzi bokugcwalisa umbala.

I-Waveform Scope

I-Waveform Scope ibonisa ukukhanya namanani e-RGB & YCbCr esithombe.Kusukela ku-Waveform Scope, abasebenzisi bangabona ukukhanya nobumnyama besithombe.I-Waveform Scope iguqula ileveli ekhanyayo kanye nezinga elimnyama lesithombe libe i-waveform.Isibonelo, uma inani elithi "All Dark" lithi "0" futhi inani elithi "All Bright" lithi "100", lizoxwayisa abasebenzisi uma ileveli yobumnyama ingaphansi kuka-0 futhi ileveli yokukhanya ingaphezulu kuka-100 esithombeni.Ngakho-ke, umthwebuli wevidiyo angakwazi ukuphatha kangcono la mazinga ngenkathi eshutha ividiyo.

Njengamanje, umsebenzi we-Histogram uyatholakala kumakhamera we-DSLR wezinga lokungena kanye neziqaphi zenkundla.Kodwa-ke, kuphela abaqaphi bokukhiqiza abaqeqeshiwe abasekela umsebenzi we-Waveform Scope.

Umbala Wamanga

Umbala Wamanga ubuye ubizwe ngokuthi “Ukusiza Ukuchayeka.”Uma Umsebenzi Wombala Wamanga uvuliwe, imibala yesithombe izogqanyiswa uma ivezwe kakhulu.Ngakho-ke, umsebenzisi angakwazi ukuhlola ukuchayeka ngaphandle kokusebenzisa ezinye izisetshenziswa ezibizayo.Ukuze ubone ngokugcwele inkomba yoMbala Wamanga, umsebenzisi kufanele aqonde i-spectrum yombala eboniswe ngezansi.

Isibonelo, ezindaweni ezinezinga lokuchayeka elingu-56IRE, umbala ongamanga uzoboniswa njengombala ophinki kusiqaphi uma sisetshenziswa.Ngakho-ke, njengoba ukhulisa ukuchayeka, leyo ndawo izoshintsha umbala ube grey, bese kubaphuzi, futhi ekugcineni ibe bomvu uma ichayeke ngokweqile.Okuluhlaza okwesibhakabhaka kubonisa ukuchayeka kancane.

I-Zebra Pattern

I-“Zebra Pattern” iwumsebenzi wokusiza ekuvezeni okulula ukuwuqonda kubasebenzisi abasha.Abasebenzisi bangasetha ileveli yomkhawulo wesithombe, etholakala kunketho ethi “Izinga Lokuchayeka” (0-100).Isibonelo, uma i-threshold ileveli isethelwe ku-“90″, isexwayiso sephethini yedube sizovela uma ukukhanya kusikrini sekufinyelela ngaphezu kuka-“90″, okukhumbuza umthwebuli wezithombe ukuthi aqaphele ukuchayeka ngokweqile kwesithombe.