Qonda Indlela Yokugwema Izinguquko ezingathandeki Ezithombeni Zakho Ze-Digital
Izinto zokusebenza ze-Digital kukhona izinguquko ezingafuneki ezenzeka esithombeni ezibangelwa izici ezihlukahlukene ngaphakathi kwekhamera yedijithali. I-albhamu ingabonakala kokubili i- DSLR noma iphuzu bese idubula amakhamera futhi ibangele ukunciphisa ikhwalithi yesithombe.
Izindaba ezinhle ukuthi ngokuqonda izinhlobo ezahlukene zezithombe ezibonakalayo, zingakwazi (noma ingxenye enkulu) zigweme noma zilungiswe ngaphambi kokuba isithombe sithathwe.
Ukuqhakaza
Amaphikseli esithombeni se-DSLR aqoqe ama-photons, aguqulwa abe yi-electrical charge. Noma kunjalo, amaphikseli angakwazi ukuqoqa ama-photons amaningi kakhulu, okubangela ukuchichima kwenkokhelo kagesi. Lokhu kugeleza kungaphambanisa ngamaphikseli akhona, okwenza kube nokukhululeka ezindaweni ezithombeni. Lokhu kuyaziwa njengokuqhakaza.
I-DSLRs eminingi yanamuhla inamasango aphikisanayo okusiza ukukhipha lokhu okukhokhiswa ngokweqile.
I-Chromatic Aberration
Ukwehliswa kwe-Chromatic kwenzeka kakhulu lapho kudubula nge -lens-wide angle futhi kubonakala sengathi umbala ugoqa eduze kwamaphethelo aphezulu ahlukene. Kubangelwa i-lens engagxilanga ama-wavevel we-light ukufika eqondile efanayo. Ungase ungakuboni kusikrini se-LCD, kodwa singabonwa ngenkathi kuhlelwa futhi ngokuvamile kuzoba umdwebo obomvu noma we-cyan eceleni kwemiphetho yesifundo.
Kungalungiswa ngokusebenzisa amalensi anezicucu ezimbili noma ngaphezulu zezingilazi ezinemikhakha ehlukene yokubukeka.
Jaggies noma Aliasing
Lokhu kubhekisela emaphethelweni ebonakalayo agxile emigqeni ye-diagonal esithombeni se-digital. Ama-pixel ayikwele (akuhambanga) futhi ngoba umugqa odibeneyo uqukethe iqoqo lamaphikseli wesigcawu angabheka njengochungechunge lwezitebhisi zezitebhisi uma amaphikseli enkulu.
I-Jaggies iyanyamalala nekhamera eliphezulu yokuxazulula ngoba amaphikseli amancane. Ngokuvamile i-DSLR iqukethe amakhono okulwa, njengoba azofunda ulwazi oluvela emaceleni omabili onqenqemeni, ngaleyo ndlela ithambekele emigqeni.
Ukwehlisa ekukhiqizweni kokuthunyelwe kuzokwandisa ukubonakala kwe-jaggies futhi yingakho ukuhlunga okuningi kuqukethe isilinganiselwa sokulwa. Ukunakekela kufanele kuthathwe ukuze ugweme ukwengeza ama-anti-alias amaningi njengoba kungase futhi kunciphise ikhwalithi yesithombe.
Ukucindezela kwe-JPEG
I-JPEG ifomethi yefayili yesithombe ejwayelekile kakhulu esetshenziselwa ukulondoloza amafayela wesithombe sedijithali. Noma kunjalo, i-JPEG inikeza ukuhwebelana phakathi kwekhwalithi yesithombe nobukhulu besithombe.
Njalo uma ulondoloza ifayela njenge-JPEG, ucindezela isithombe bese ulahlekelwa ikhwalithi encane . Ngokufanayo, njalo uma uvula futhi uvale i-JPEG (noma ngabe awukho ukuhlela kukho), usalahlekelwa izinga.
Uma uhlela ukwenza izinguquko eziningi esithombeni, kungcono ukuyigcina ekuqaleni kwifomethi engaxilwanga, njenge-PSD noma i- TIFF .
I-Moire
Uma isithombe sinezindawo eziphindaphindiwe zemvamisa ephakeme, lemininingwane ingadlula ukuxazulula ikhamera . Lokhu kubangela i-moire, ebukeka njengemigqa yemidwebo ye-wavy esithombeni.
I-Moire ivame ukuqedwa ngamakhamera aphezulu. Labo abanenombolo ephansi ye-pixel bangasebenzisa izihlungi zokulwa nokuqeda ukulungisa inkinga ye-moire, nakuba behlisa isithombe.
Umsindo
Umsindo uveza izithombe njengama-specks ombala angafuneki, noma umsindo uvame ukubangelwa ngokukhulisa i- ISO yekhamera . Kuzobonakala kakhulu emathunzini nakumnyama omfanekiso, kaningi njengamaqabunga amancane obomvu, eluhlaza, nohlaza okwesibhakabhaka.
Umsindo ungancishiswa ngokusebenzisa i-ISO ephansi, okuzokwenza isivinini sizinikezele futhi yisona sizathu esiyinhloko sokuhamba ngokuphezulu njengoba kudingeke kakhulu lapho ukhetha i-ISO.