Uma uthengela iKhamera, Kubalulekile Ukukwazi Ukuhluka
Ama-camcorders amaningi (ngisho nama-Smartphone) afaka uhlobo lobuchwepheshe bokusimama (IS) ubuchwepheshe ukunciphisa ukufiphaza kwevidiyo okubangelwa ngezandla ezithintekayo noma ukunyakaza komzimba. Okuyisisekelo kunazo zonke i-tripod kodwa kunezinhlobo ezimbili zobuchwepheshe ezithatha isinyathelo esengeziwe: optical and digital.
Ukuqiniswa kwesithombe kubalulekile kuwo wonke amakhamera, kodwa kubaluleke kakhulu kulabo abanezivinini ezincane zokuvala noma ama-zoom lens eside. Uma i- lensi isondeza ekukhuliseni kwayo okukhulu, iba yinto ebucayi kakhulu ngisho nokunyakaza kancane.
Abanye abakhiqizi babeka igama lomkhiqizo ekubuyiseleni ubuchwepheshe bokuqiniswa kwesithombe. I-Sony iyibamba iSteadyShot kuyilapho iPanasonic ibiza i- Mega OIS ne-Pentax Shake yokunciphisa . Ngamunye unama-nuances kodwa enza umsebenzi ofanayo.
Kungakhathaliseki ukuthi yikuphi, kufanele uhlale ubheka ngemuva kwe-marketing jargon bese ubheka imininingwane. Kufanele ikhombise ukuthi i-camcorder enikeziwe ine-optical noma i-digital stabilization noma kokubili.
I-Optical Image Stabilization
Ukuqiniswa kwesithombe se-optical (OIS) kuyindlela ephumelela kakhulu yokusimama kwesithombe. Ama-Camcorders ane-optical image stabilization ngokuvamile anezinzwa ezincane ezinjenge-lens ngaphakathi kwe-lens ezishaya ngokushesha izingcezu zengilazi lensiza ekuhambeni kokusetha ngaphandle kokuthi isithombe sishintshelwe kwifomu ledijithali.
Ubuchwepheshe bokuqiniswa kwesithombe kubhekwa njengokubonakalayo uma kuhlanganisa into ehambayo ngaphakathi kwe-lens.
Abanye abakhiqizi be-camcorder bakuvumela ukuthi uvule futhi uvale isithombe se-optical, noma ufake amamodi amaningana ukuze uhlawulele izinhlobo ezahlukene zokuhamba kwekhamera (noma okuqondile noma okuqondile).
I-Digital Image Stabilization
Ngokungafani nezinhlelo ze-optical, ukusimama kwesithombe se-digital (ebizwa nangokuthi ukuqiniswa kwesithombe se-electronic, noma i-EIS) isebenzisa ubuchwepheshe be-software ukunciphisa umthelela wezandla ezishisayo kwividiyo. Kuye ngesibonelo, lokhu kungafezwa ngezindlela eziningana.
Amanye ama-camcorders azobala umthelela wokunyakaza komzimba wakho bese usebenzisa leyo datha ukulungisa ukuthi yiziphi amaphikseli esithombeni sesithombe se-camcorder esetshenziswa. Isebenzisa amaphikseli ukusuka ngaphesheya kwefreyimu ebonakalayo njengesikhumbuzi sokunyakaza ukuze sibhebhezele phezu kwefrimu yokuguqula ngohlaka.
Kumakhamera wezedijithali zabathengi, ukuqiniswa kwesithombe se-digital ngokuvamile kuvame ukusebenza kunokuba ukuqina kwe-optical. Njengoba kunikezwe ukuthi, kubheka ukubuka ngokucophelela uma i-camcorder ithi ikwazi "ukuqiniswa kwesithombe." Kungenzeka kube yizinhlobo ezihlukahlukene zedijithali.
Kukhona nezinhlelo zokusebenza zesofthiwe ezingasebenzisa ukuhlunga kokuqiniswa kuvidiyo ngisho nangemva kokuba kuthathwe, ngokulandelela ukunyakaza kwephikseli nokulungisa uhlaka. Noma kunjalo, lokhu kubangela isithombe esincane esinqunyiwe ngenxa yefreyimu encane noma i-extrapolation ukugcwalisa imiphetho elahlekile.
Okunye ukuThuthukiswa kobuchwepheshe bezithombe
Nakuba ukuqina kwe-optical neyedijithali kuvame kakhulu, ezinye ubuchwepheshe buzama ukulungisa ividiyo engaqinisekile.
Isibonelo, kunezinhlelo zangaphandle ezizinzile umzimba wonke wekhamera kunokuba ube khona ngaphakathi kwekhamera yekhamera. Indlela lokhu kusebenza ngayo ngokuba ne-gyroscope ehlanganiswe nomzimba wekhamera ukwenza ukuzinza. Lezi zivame ukubonakala lapho zidweba kusuka emotweni ehambayo.
Enye i-CCD yokudlulisa i-CCD (OTCCD), esetshenziselwa ukuhlola izinkanyezi ukuze kuqinisekiswe izithombe.