Pali zambiri kwa chithunzi chojambula kuposa chiwerengero cha pixelisi.
Chojambula chajambula mu camcorder (kapena kamera ya digito) ndicho chimene chimaika "digito" kukhala kamjakitala kamakono. Mwachidule, chithunzithunzi chajambula chimasintha kuwala komwe kamagwidwa ndi lens yanu ya camcorder ndikusandutsa chizindikiro cha digito. Kuunika kumeneku kumapangidwanso ndikusungidwa kukumbukira kwa camcorder monga fayilo ya vidiyo yadijito imene mungayang'ane pamakompyuta kapena TV. Pafupi ndi disolo lokha, chojambula chajambula ndicho chinthu chofunikira chomwe chimatsimikizira kanema wabwino.
Pali mitundu iwiri ikuluikulu ya makina ojambula zithunzi ( CCD) ( CCD ) komanso CMOS (complementary metal oxid semiconductor). Mitundu iwiri ya makina opanga mafano ali ndi zikwi mazana kapena mamiliyoni a pixelesi. Ganizirani za pixel ngati kabichi kakang'ono kamene kamatengera kuwala ndikusandutsa chizindikiro cha magetsi.
Momwe CMOS & amp; CCD Sensors zosiyana
Mu cCD sensor sensor, pixels amatha kuwala ndikuyendetsa kumbali ya chip kumene amasandulika chizindikiro cha digito. Mu sensa ya CMOS, kuwala kumatembenuzidwa pa pixel yokha - palibe mabotolo ogwiritsira ntchito magetsi. Kusiyana kwachinsinsi kumeneku ndikofunika: chifukwa chizindikiro cha kuwala sichiyenera kutumizidwa kumapeto kwa chip kuti chitembenuzidwe, chojambulira cha CMOS chimafuna mphamvu zochepa kuti zigwire ntchito. Izi zikutanthawuza kuti, zonse zofanana, kamcorder ndi capsenti ya CMOS idzapereka moyo wabwino kwambiri wa batri kuposa wina ali ndi CCD. Zoonadi, zinthu sizingakhale zofanana, kotero musangoganiza kuti camcorder ya CMOS ili ndi moyo wabwino kwambiri wa batri kusiyana ndi njira ya CCD.
Kwa zaka zambiri, masensa a zithunzi za CCD ankaonedwa kuti ndipamwamba luso lamakono monga khalidwe la zithunzi ndi kanema. Komabe, masensa a CMOS awonjezeka kwambiri mu dipatimenti imeneyi ndipo tsopano akupezeka pa kuchuluka kwa camcorders phindu lonse. Sony, mwachitsanzo, pakali pano amagwiritsa ntchito masensa a CMOS pamwamba pake pamtundu wa camcorder, HDR-XR520V.
Choncho, pamene maselo a CMOS ndi CCD amasiyana, sachita mwanjira yomwe iyenera kukhala yopindulitsa kwa ogulitsa ambiri. Muyenera kulipira pang'ono mtundu wa sensa mu camcorder yanu ndi kumvetsera kwambiri kuwerengera kwa pixel ndi kukula kwake kwa sensa.
Malingaliro a Pixel
Mukamayang'anitsitsa zizindikiro za camcorder, nthawi zambiri mumawona ziwerengero ziwiri zomwe zasankhidwa ndi sensa: chiwerengero cha pixel chowerengeka ndi chiwerengero cha pixel chogwira ntchito. Chiwerengero chonse chikuimira chiwerengero cha pixels pa sensa, koma ikukuthandizani momwe angapangire pixel angapo panthawi yogwiritsa ntchito kanema kapena zithunzi. Choncho, mvetserani kuwerengera kokhala ndi pixel pamene mukuyang'ana chisankho cha kanema yanu.
Kuwerengera kokwanira kwa pixel n'kofunika pa chifukwa china: zimakuthandizani kudutsa mumalonda. Tengani Camcorder A. Ikunena kuti ikhoza kutenga chithunzi cha megapixel 10 (mwachitsanzo chithunzi ndi pixel 10 miliyoni mmenemo). Koma pamene muyang'ana chiwerengero cha ma pixel opambana pachithunzi chake chajambula, mukuwona kuti ndizomwe zimakhala ndi segapixel 4. Kodi chithunzithunzi cha zithunzi-majapixel 4 chimatenga chithunzi cha megapixel 10? Zatha kupyolera mu ndondomeko yotchedwa interpolation. Monga mwachidziwitso, muyenera kuchotsa khalidwe la zithunzi zomwe zimapangidwa kupyolera pamagulu. M'malo mwake, gwiritsani ntchito nambala ya ma pixel ogwira mtima pamsewu wa kamera monga chitsogozo cha kuthetsa kwenikweni kwazithunzi zanu.
Kufunika kwa Sensor Sensor Size
Chiwerengero cha ma pixeleri pa chojambula chojambula si chokhacho chomwe chimakhudza ubwino wa kanema yomwe yatengedwa. Kukula kwa thupi kumatanthauzanso. Makina akuluakulu a zithunzi angatenge kuwala kwambiri kuposa zing'onozing'ono, ngakhale ali ndi pixelsi zochepa. Ndichifukwa chakuti, ngakhale kuti ndi owerengeka, ma pixel awa ndi akulu ndipo amatha kuwunikira kwambiri.
Ichi ndi chifukwa chake muwona camcorders amalengeza osati nambala ya pixels pajambulira fano, koma kukula kwa sensa yokha (nthawi zambiri mu magawo a inchi). Muli bwino kugula camcorder ndi chojambulira chithunzi chachikulu ngakhale chiri ndi pixel zocheperapo kusiyana ndi mpikisano wokhala ndi mpikisano ndi mapilosi ambiri.