Yintoni zesimo? isampula frequency

Yintoni lenguqu, namhlanje uyazi nayiphi zobungcali kwinkalo nokufota yedijithali. Noko ke, abantu abaninzi ekuqaleni nje ukuba baqhelane nale ndawo, asazi iimpawu yayo ephambili, ukuze ukwazi ukuphepha iimpazamo ezithile.

Yintoni na?

Yintoni zesimo? Le ndlela ezingathandekiyo, nto leyo ekhokelela ukuba umgangatho mfanekiso ngokuphawulekayo yonakale. Lo mkhwa kufuneka ezinxulumene nasiphi na isixhobo okanye inkqubo, apho ulwazi wohlulwe iisampuli eziliqela ezahlukeneyo. Kulo mzekelo, isampulu zingathathwa njenge uhlobo ipateni uphazamiseko, ukuba kukho unxulumano ethile phakathi rhoqo isenzeko kunye nesakhiwo ngamaxesha ibonakele idatha.

Iliso lomntu rhoqo izama ukuqinisekisa ukuba bebona kukho umlinganiselo othile njengento umzekelo uphazamiseko ukuba ayicacanga eyona ntsingiselo umfanekiso. Ukuqwalasela umzekelo ukuba isampuli, kukubonelela ngokomfuziselo moire, nto leyo ichanekile kakhulu ukusebenza kwayo, kodwa kusenokuba kubonisa indlela umntu ukulahlekiswa kwimeko xa zintlu zimbini zithi sebeqala ukuba basebenzisane kunye namanye, wakha wesithathu.

Yintoni moiré?

Moire na indlela Akukwazi esimfaneleko, apho ekuqaleni wayengekho ngalo mbandela. Le effect Inokuba kwenzeke kwi Imifanekiso eyahlukeneyo efunyenwe ngokusebenzisa izixhobo zedijithali. Kwaye ingxaki apha kukuba indlela into enyanzeliswa phezu indlela yokubekwa pixel isizalo, apho kukho wesithathu, leyo ibizwa ngokuba moire.

Advantageously uninzi amatyala oku kwenzeka xa umahluko eneenkcukacha imifanekiso ephakamileyo musa ne lizakuya kusombululo boluvo ekuqaleni ihleliwe. Ngokukodwa, ingafunyanwa rhoqo kwimeko isusiwe izinto ezifana iinwele okanye ilaphu, kwakunye iziza, leyo zinika inani elikhulu ungamalungu phindo. Ngokufuthi, moire akafumaneki kwindalo, njengoko livela kwi imifanekiso, ezo zifunyenwe ngokusebenzisa ikhamera yedijithali okanye scan kamva kakubi.

Lidla iikhamera digital namhlanje, ukuze sinciphise koku, sebenzisa icebo lokucoca ekhethekileyo woqondo ephantsi-pass, ngoko ke ukuba ngenene uza ukusebenza ngobungcali kufota, kulo mzekelo, kufuneka basoloko becinga malunga uhle nalo msebenzi, apho baya kukwazi ukunika umgangatho eyaneleyo ngokuxhomekeke kwiimeko eziziisekondari.

Discretization lekhamera mihla

Kwizixhobo namhlanje digital, isiphumo isampuli kungenxa yokuba ulwazi yahlulwe iisampuli eziliqela rhoqo. Ngokukodwa, enye iipateni kulo mzekelo i indawo ye pixel isizalo, indlela yesibini na izinto kulo mfanekiso, nto leyo kuphindwa phezu kwindawo enkulu okanye abo batshintsha emva inani elithile ipixels kwi ezinqamlezayo okanye kwicala longitudinal.

Kwabo ukuqonda ukuba ngubani na yintoni na isampulu kwaye xa khona, unako ukunika umzekelo ethile. Xa kukho nokufumaneka zaneleyo inani lee-pixel ukuba adlulisele ingcaciso echanekileyo yomfanekiso, kukowuphi umzekelo apho ayikho arcade games. Xa version standard bekuya kwanela nje ukuba ukhethe isigqibo ephakamileyo, ukuqinisekisa ulondolozo inani elifunekayo pixels ukuba iinxalenye ukudluliselwa kwifoto kunye nokuchaneka ethile, ukuba ungabi inani pixels bekuya ezaneleyo, sabona nje inani elincinane izinto zalo mfanekiso.

Noko ke, enyanisweni oku akuyonyaniso. theory yesampulu ithi ukuba ngenene le meko imbi kakhulu, yaye ukuba akayi kuba nani ngokwaneleyo pixels ukuze enze umfanekiso othile, ngoko ke umgangatho umfanekiso ziya kugxagxiseka ngokuqhubekekayo.

Zingaphi pixels oyifunayo?

Thatha imeko umzekelo xa kukho umfanekiso imigca abamnyama nabamhlophe nje 20 ngalinye ukuba ububanzi pixels-5. Kulo mzekelo, ukuba ubuncinane omnye pixel enikwa kwilayini nganye, umfanekiso esinoshicilelwa. Ngokuqhelekileyo, ukuba pixels akukho kuwa kakuhle embindini kumgca ngamnye, kulo mzekelo, pixel nganye iya uyibone, ongekho mhlophe okanye lube mnyama, kwaye komthunzi walo sele ngqo iya kuxhomekeka kwindlela pixel leyo ikwindawo kuthelekiswa kwemigca.

Ukuba inani pixels kumfanekiso iza kuncipha, ngoko kulo mzekelo, ezinye zazo ziya kunikwa phakathi kwemigca, khon 'ukuze lo mfanekiso livela phezulu ngokomfuziselo eyakusoloko azifani, kuxhomekeke unxulumano na lekhefu phakathi kwemigca kunye nenani pixels. Kakade ke, lo mfanekiso akayi kuba olukhutshelweyo ngqo yokuqala, njengoko isakhiwo rhoqo wezintlu sele ngokuphawulekayo kakuhle. Yiyo le nto kuthiwa "isampuli data" ngezangqa zobungcali.

Yintoni ukwenza ntoni?

Ukusombulula le ngxaki, oko kuyimfuneko ukuze athambise umfanekiso phambi kokuba ukunciphisa inani pixels. Ngaloo ndlela, uyakwazi ngokupheleleyo kukuphelisa ekupheleni ezibukhali kumgca ngamnye, kwaye pixels ingathatha amaxabiso aphakathi. Ngamanye amazwi, umfanekiso uba lithambile, kodwa walondoloza umqondo zalo mfanekiso.

Ingaba oku kuyichaphazela njani lo mfanekiso?

Kakade ke, lo isakhiwo ngokuphindaphindiweyo kwaye rhoqo imigca ingafumaneka kakhulu ezinqabileyo emifanekisweni bezinto ezahlukeneyo zendalo - ubukho babo idla kuphela nemifanekiso izakhiwo ezahlukeneyo ngumntu ezifana izakhiwo kunye nezinto. Noko ke, kuyo nayiphi na imeko, ubunzulu isampuli kunokuba isimanga, ngoko oku lusoloko kuphetshwa wenza naziphi na izinto ukudubula.

Kukwabalulekile ukuqaphela ukuba umgangatho umfanekiso inokuba nomahluko ngokupheleleyo, nokuba sele inani elifanayo pixels. Ngapha koko, phakathi kwezinye izinto, umahluko phakathi nemifanekiso enokuthi nayo kube kanye indlela zifunyenwe. Umzekelo, ukuba kunokwenzeka, umfanekiso ukuze ndakha kudanjisiwe ngokugqithisa lokucoca yokupasa esezantsi ukufumana amaxabiso pixel eliphakathi phambi kokuba ukunciphisa ubungakanani, ngelixa eminye yemifanekiso imane zancitshiswa ubukhulu ngaphandle ngokwenza kulo mzekelo, akukho lutshintsho ezongezelelweyo kwaye anike amaxabiso esiPhakathi imida yezinto apho kukho utshintsho ngokukhawuleza kakhulu lokukhanya.

Indlela ukuhlola?

Ukuze uqonde ukuba isebenza njani, kwanele nje ukuthatha umfanekiso, uze wenze ikopi. isihluzi yoqobo xa ubungakanani kwakhonaName inketho ekuthiwa njalo-ucoco qho-cubic, efumaneka kwi-standard Adobe Photoshop. Ngoko ke, lo mfanekiso ziya ncitshiswa. Nangona ukuhla okukhulu pixel, i uhambo phakathi tonalities ezivelayo anencasa kakhulu ezifanelekileyo ukuze nani elifumanekayo of pixels.

Emva koko, senza ikopi imifanekiso unciphisa ngaphambili, yithini, ukuya kwi-30% ye ubungakanani original, esebenzisa ukhetho "elikufutshane ummelwane indawo" kwinkqubo efanayo. Ukuba lo msebenzi ekugqibeleni uya kukunika isiphumo kwesampulu, nto leyo eya kuba kubonakala.

Sample audio

Sample Audio - a ucoco yesandi otshangatshangiswayo phambi kokuba uya kusindiswa njenge fayile odiyo. Ngamanye amazwi, ifayile ekujoliswe Akukho ikopi ngqo yesandi yomtshangatshangiso, kodwa luqikelelo nje kuphela. Kwelinye icala, ukuba isampuli odiyo inika ukwehla article kwi fayile kusindiswa, kodwa kwelinye icala kukho mininzi intlokoma aphilileyo, nto leyo akunyanzelekanga ukuba zigcinwe kwi-hard disk.

Loo yokuhluza sound ebizwa ngokuba "isampuli frequency". Kubalulekile ukuphawula ukuba eneneni kuphela ngokwesimo akukho nesandi esi siphumo, nangona bembalwa ungazi nto ngaloo nto. rate yesampulu - ke ukunyanzelwa grid ethile ukuya isandi, kunye irekhodi kuphela izinto ezithile eziphambili.

Irekhodi ngokupheleleyo zonke amaza omsindo kuya kuba nzima kakhulu. Kungenxa yesi sizathu ukuba kakhulu ezininzi ingafumaneka imeko apho ijelo-ezimbini isandi ushicilelo lwenziwa kunye rhoqo ezinye 44,1 kHz. Le yokugqibela amaninzi elikhethiweyo, le yeyona ndlela ilungileyo.

Eneneni, xa sicinga ngalo inkqubo ephilileyo, kuyimfuneko ukuba anikele ingqalelo ekhethekileyo ezifana iparameters njengoko ikhowudi nobunzulu kunye nezinga isampulu, ngenxa yokuba amazinga ephakamile, kokukhona uphawu wedijithali ilingane ukuba Analog.