Makamera ambiri omwe ali pamsika ali ndi makamera apamwamba kwambiri, makamera odziwika bwino,kotero wkusiyana pakati pa makamera a SD ndi HD? Kudzera mu kanema wolunjika komanso kusiyana kwa ma pixel, pali kusiyana kwa ma pixel, ndipo ndi kamera yodziwika bwino pa 96W ndi kupitirira apo.
Tanthauzo
Kodi HD Streaming ndi chiyani?
Mawu akuti HD amatanthauza High Definition, ndipo HD Streaming amatanthauza HD quality video resolution yomwe imawonetsedwa pa intaneti kuti igwiritsidwe ntchito. Izi zitha kuchitika pogwiritsa ntchito mitundu yosiyanasiyana ya makanema, kuphatikiza MPEG kapena streaming yosalala ya kanema.
Makanema owonera pa HD adzakupatsani kumveka bwino komanso tsatanetsatane kuposa kanema wa SD, womwe nthawi zambiri umawoneka pa YouTube ndi mawebusayiti ena. Mudzawona ma pixel ochepa mu makanema apamwamba chifukwa ali ndi ma pixel owirikiza kawiri pa chimango chilichonse (1920×1080) kuposa makanema wamba pa 1280×720. Zithunzi zapamwamba izi zimakhalanso ndi utoto wabwino komanso kuyenda bwino chifukwa cha liwiro lawo la chimango mwachangu.
Kanema wowongoka
1.SD ndi mtundu wa kanema wokhala ndi resolution yooneka pansi pa 720p (1280*720). 720p imatanthauza kuti resolution yoyima ya kanemayo ndi mizere 720 yowunikira pang'onopang'ono. Makamaka, imatanthawuza mawonekedwe a kanema "standard definition" monga VCD, DVD, ndi mapulogalamu a pa TV okhala ndi resolution ya mizere pafupifupi 400, ndiko kuti, standard definition.
2.Pamene resolution ya thupi ifika pa 720p kapena kupitirira apo, imatchedwa high-definition (Chingerezi cha High Definition) chomwe chimatchedwa HD. Ponena za miyezo yapamwamba, pali miyezo iwiri yodziwika padziko lonse lapansi: resolution yoyima ya kanema imapitirira 720p kapena 1080p; chiŵerengero cha kanema ndi 16:9.
Kanema wa High Definition (HD) si watsopano m'dziko la zamagetsi komwe kwasintha kwambiri kuchoka pa Standard Definition (SD) kupita ku HD yowoneka bwino kwambiri.
Mu gawo la kuwunika mafakitale, kusinthaku kwakhala kochedwa koma sikungapeweke. Ngakhale kuti makina ambiri owunikira ndi makamera omwe alipo pamsika akadali Standard Definition, akatswiri akulosera kuti HD idzakhala ukadaulo wofunikira pofika chaka cha 2020.
Zithunzi zamitundu zimapangidwa ndi madontho ang'onoang'ono otchedwa ma pixel, ndipo resolution ikutanthauza chiwerengero chonse cha ma pixel mu kanema kapena chithunzi. Tanthauzo la kanema wa SD limayamba pa 240p ndipo limatha pa 480p, pomwe resolution ya 1080p ndi full-strength HD (ndi chilichonse choposa apa chimaonedwa kuti ndi Ultra-HD).
Zambiri zowonjezera:
Momwe kamera imagwirira ntchito:
1. Kamerayi imapangidwa ndi lenzi, chogwirira lenzi, capacitor, resistor, infrared filter (IP Filter), sensa (Sensor), circuit board, image processing chip DSP ndi reinforcement board ndi zina.
2. Pali mitundu iwiri ya masensa, imodzi ndi sensa yolumikizidwa ndi chaji (CCD) ndipo inayo ndi sensa yachitsulo ya oxide conductor (CMOS); ma circuit board nthawi zambiri amakhala ma circuit board osindikizidwa (PCB) kapena ma flexible circuit board (FPC).
3. Kuwala kwa malo kumalowa mu kamera kudzera mu lenzi, kenako kumasefa kuwala kwa infrared komwe kumalowa mu lenzi kudzera mu fyuluta ya IR, kenako kumafika pa sensa (sensa), yomwe imasintha chizindikiro cha kuwala kukhala chizindikiro chamagetsi.
4. Kudzera mu chosinthira chamkati cha analogi/dijito (ADC), chizindikiro chamagetsi chimasinthidwa kukhala chizindikiro cha digito, kenako chimatumizidwa ku chipangizo chosinthira zithunzi cha DSP kuti chigwiritsidwe ntchito, ndikusinthidwa kukhala RGB, YUV ndi mitundu ina yotulutsira.
Nthawi yotumizira: Mar-03-2023
