Ukuqonda Ukuxhuma ku-Digital Photography
Uma ucindezela inkinobho ye-shutter bese uthatha isithombe, isithombe asigcini ngokugcina umemori kumemori khadi. Ikhamera yedijithali, kungakhathaliseki ukuthi i-lens imodeli ehleliwe, i- ILC engenasipiliyoni , noma i-DSLR, kufanele idlule uchungechunge lwezinyathelo ngaphambi kokuba isithombe sigcinwe kwimemori khadi. Enye yezingxenye eziyinhloko zokugcina isithombe kwikhamera yedijithali yisiphequluli sesithombe.
Indawo yokugcina isitoreji esithombeni sekhamera ibalulekile ekunqumeni ukusebenza komsebenzi kwanoma iyiphi ikhamera, ikakhulukazi uma usebenzisa imodi yokudubula eqhubekayo. Ukuze ufunde kabanzi mayelana nesikhumbuzi sekhamera nokuthi ungayisebenzisa kanjani ngokuvumelana nokwenza ngcono ikhamera yakho, qhubeka ufunda!
Ukubamba idatha yedatha
Uma urekhoda isithombe ngekhamera yedijithali, inzwa yesithombe ivuliwe ekukhanyeni, futhi inzwa iyalinganisa ukukhanya okushaya pixel ngayinye enensheni. Inzwa yesithombe inezigidi zamaphikseli (izindawo zokuthola izithombe) - ikhamera ye-megapixel engama-20 iqukethe ama-receptors wesithombe esizigidi ezingu-20 esithombeni sesithombe.
Inzwa yesithombe inquma umbala nokuqina kokukhanya okushaya pixel ngayinye. Inqubo yesithombe ngaphakathi kwekhamera iguqula ukukhanya kwedatha yedijithali, okuyisethi yezinombolo ikhompyutha ezingayisebenzisa ukudala isithombe esikrinini sokubonisa. Le datha iyasetshenziswa ekhamera bese ibhalwa ekhadini lokugcina. Idatha efayeleni lesithombe ifana nanoma iyiphi enye ifayela lekhompyutha ongayibona, njengefayela lokucubungula igama noma ispredishithi.
Ukuhambisa idatha ngokushesha
Ukuze usize ukusheshisa le nqubo, i- DSLR kanye namanye amakhamera adijithali aqukethe umshini wekhamera (ohlanganisa imemori yokufinyelela okungahleliwe, noma i-RAM), okwenza imininingwane yedatha okwesikhashana ngaphambi kokuthi ihadiwe lekhamera liyibhalele kwimemori khadi. Ikhamera enkulu yesithombe sekhamera ivumela izithombe eziningi ukuthi zigcinwe kule ndawo yesikhashana, ngenkathi zilinde ukubhalwa kwimemori khadi.
Amakhamera ahlukene namakhadi eememori ahlukene anezilinganiso ezihlukene zokubhala, okusho ukuthi bangasula isampuli sekhamera ngesivinini esihlukile. Ngakho-ke enendawo yokugcina enkulu ekhamera yekhamera, ivumela ukugcina izithombe ezingaphezulu kule ndawo yesikhashana, okwenza ukusebenza okungcono uma usebenzisa imodi yokudubula eqhubekayo (ebizwa nangokuthi i-burst mode). Lemodi ibhekisela ekutheni ikhamera ikhono ukuthatha izibhamu eziningana ngokushesha emva komunye nomunye. Inombolo yamashothi angathathwa ngesikhathi esifanayo kuncike ngobukhulu bebhokisi lekhamera.
Ngenkathi amakhamera angabizi anezindawo ezincane ezincane, ama-DSLR amaningi anamuhla aqukethe ama-buffers amakhulu avumela ukuthi uqhubeke ukudubula ngenkathi idatha isetshenziswe ngemuva. I-DSLRs yangempela yayingenayo i-buffers nhlobo, futhi kwadingeka ulinde ukudubula ngakunye ukuze kusetshenzwe ngaphambi kokuthi uphinde udubule!
Indawo ye-Image Buffer
Ikhamera yekhamera ingatholakala ngaphambi noma ngemuva kokucubungula isithombe.
- Ngaphambi kokuthi kusetshenziswe i-Image Buffer. Idatha ye-RAW esuka enzwa ifakwa ngqo ku-buffer. Idatha isetshenziselwa bese ibhalwa ekhadini lokugcina ngokuhlanganyela neminye imisebenzi. Emakhamera naloluhlobo lwe-buffer, ukudubula okuqhubekayo akunakwandiswa ngokunciphisa usayizi wefayela.
- Ngemuva kwe-Image Processing Buffer. Izithombe zicutshungulwa futhi ziphenduke zibe yifomethi yazo yokugcina ngaphambi kokuthi zibekwe ku-buffer. Ngenxa yalokhu, inani lezibhamu ezithathwe kwimodi yokudubula eqhubekayo zinganda ngokunciphisa usayizi wefayela wesithombe.
Amanye ama-DSLRs manje asebenzisa ukukhwabanisa kwe- "Smart". Le ndlela ihlanganisa izici kokubili ngaphambi nangemva kwemibukiso. Amafayela angaphenduliwe agcinwa ku-buffer yekhamera ukuvumela ama-"ozimele aphezulu" ngesilinganiso "(fps)". Bese bahlelwa ngendlela yabo yokugcina babuyiselwe ku-buffer. Amafayela kamuva angabhalwa kumakhadi okugcina ngesikhathi esifanayo njengoba izithombe zicutshungulwa, ngaleyo ndlela zivimbela umgogodla.