Kunzwisisa Digital Pixels muKutevedza
Kana iwe ukatarisa zvido zvekambani imwe digital kamera iwe uchaona maviri mazita ekuverengwa kwepikeleri: inobudirira uye chaiyo (kana yakakwana).
Sei kune nhamba mbiri uye zvinorevei? Mhinduro yemubvunzo iwoyo yakaoma uye inowanikwa zvakanaka, saka regai titarise mumwe nomumwe.
Chii chinonzi Effective Pixels?
Digital camera image sensor ine mapekisi akawanda , anounganidza photons (magetsi emwenje wechiedza). Idiodhidhiode inozoshandura photoni mumutengo wemagetsi. Pixel imwe neimwe ine photodiode imwe chete.
Mapiksesi anobudirira ndiwo mapikiseli ari kunyanya kuunganidza dhidhiyo yemifananidzo. Izvo zvinobudirira uye nedudziro, nzira dzinobatsira "kubudirira mukugadzira chido chaunoda kana chikonzero chinotarisirwa." Aya ndiwo mapikiseli ari kuita basa rekutora mufananidzo.
Chimwe chinhu chinowanikwa mukati mekuda, somuenzaniso, 12MP ( megapixel ) kamera ine nhamba yakaenzana yakaenzana yemapikiseli anoshanda (11.9MP). Nokudaro, mapikiseli anoshanda anoreva nzvimbo ye sensor iyo mapikisi 'anoshandisa' anovhara.
Pane dzimwe nguva, haisi mapiksesi ose e sensor anogona kushandiswa (somuenzaniso, kana lensi isingagoni kuvhara rutsanga rwenzwi rose).
Chii chiri Actual Pixels?
Iko chaiyo, kana kuti yakazara, pixel kuverenga yesenera yekhamera inosanganisira iyo (inenge) 0.1% yepiksesi yakasara shure mushure mekuverenga mapikiseti anoshanda. Zvinoshandiswa kugona miganhu yechifananidzo uye kupa ruzivo ruvara.
Izvi zvinosara mapikisa zvinotenderera kumucheto wechitarisiko chemufananidzo uye zvinodzivirirwa kubva pakugamuchira chiedza asi zvichiri kushandiswa sezvenhare iyo inogona kubatsira mukuderedza ruzha. Vanogamuchira chiratidzo chinoudza sensor kuti yakawanda sei 'yerima' yakagadziriswa panguva yekutsvaga uye kamera inogadzirisa izvozvo kuburikidza nekugadzirisa kukosha kwemapikiseli anoshanda.
Izvi zvinorevei kwauri ndezvekuti nguva yakareba, yakadai seye inotorwa usiku, inofanira kuderedzwa muhuwandu hwemheremhere munzvimbo dzakadzika dzepakati yemufananidzo. Paiva nemabasa akawanda ezveshutse apo huvharo yekamera yakanga yakazaruka, iyo yakaita kuti idzi pixels dzakatarisa dzishandise, dzichiudza sensor kamera kuti pave nemimwe nzvimbo yemumvuri inofanira kuva nehanya nazvo.
Chii chinonzi Interpolated Pixels?
Chimwe chikonzero chokufunganya nemakonikisi emakera ndechokuti mamwe makamera anogona kukwanisa kuverenga nhamba yemapiksesi esero.
Somuenzaniso, 6MP kamera inogona kukwanisa kubudisa 12MP mifananidzo. Muchiitiko ichi, kamera inowedzera mapikiseti matsva pedyo nemaegapixels 6 ayo akabatwa kuti aumbe ma megapixel 12 emashoko.
Iyo faira yefaira inowedzera uye izvi chaizvoizvo zvinogadzirisa mufananidzo uri nani kupfuura iwe kana iwe uchizopindira mumifananidzo yekugadzira software nokuti kuburitsa kunoitwa kusati kwaitwa JPG kudzvinyirira.
Zvisinei, nguva dzose inokosha kuyeuka kuti kududzirwa hakugoni kuumba dambudziko risina kutorwa panzvimbo yekutanga. Kusiyana kwehutano pakushandisa kuburitsa mukamera kune marginal.