Yuav ua li cas puas muaj tus cai duab ntaub ntawv nyob rau hauv lub computer?

Nyob rau hauv nruab nrab ntawm lub xyoo pua xeem, vim qhov yuav tsum tau rau ib tug yeeb yam uas sawv cev ntawm cov ntaub ntawv, pib los mam coding duab ntaub ntawv. Niaj hnub no, peb twb peb tsis tau xav txog tej yam muaj ib lub computer tsis muaj ib tug tag nrho-fledged loj glossy screen. Niaj hnub nimno cov ntxaij vab tshaus thiab computer saib yog sib txawv heev los ntawm nws cov predecessors: cov duab no yog ntau npaum li cas cov yeeb yuj thiab tseeb tiag, sib sib zog nqus thiab nplua nuj xim - cov kev kawm yog tshwm tag. Yuav ua li cas, ces, muaj yog coding duab ntaub ntawv? Raws li ib tug duab tso tawm kom pom ntawm qhov screen? Yuav kom to taub qhov no, nws yog tsim nyog los xyuas lub hauv paus ntsiab lus ntawm converting cov ntaub ntawv mus rau hauv cov hom ntawv thiab lawv tom ntej ntsoos ntsoos.
Raws li peb paub, cov cai ntaub ntawv - qhov no yog ib tug heev lub sij hawm-siv, tab sis tsim nyog cov txheej txheem, txij thaum lub computer tsuas ua haujlwm nrog lub tshuab codes. Video, ntawv nyeem, dluab - tag nrho cov nyob rau hauv ib cov hom ntawv yog hloov dua siab tshiab rau hauv ib tug ua ke ntawm zeros thiab sawv daws yuav. Yuav ua li cas yog tus cai duab ntaub ntawv?

Yog hais tias koj saib nyob rau hauv lub monitor nrog ib tug tenfold nce, peb yuav pom tau hais tias nws muaj ib tug plurality ntawm lub los yog yeej hlwb, grouped nyob rau hauv peb, hu ua pixels. Nws hloov tawm hais tias hauv daim duab ntawm qhov screen yog tsis tshua ib daim, nws yog tawg rau hauv cov pob me me hais, txheej txheem ntawm nyob rau hauv kab. Xws li ib tug duab no yog hu ua ib tug bitmap. Pixels yog tej yam xim: liab, ntsuab thiab xiav (RGB-hom). Lwm yam xim yog ua thaum tov. Ib tug pixel yuav yog zes los yog tsis (1 los yog 0). Tsis tas li ntawd, ib tug Hawj txawm tej zaum yuav txawv nyob ntawm seb lub luminescence siv rau qhov no tseem ntxiv faib khoom. Tus nqi ntawm cov ntaub ntawv faib rau ib tug pixel, hu ua xim tob (k). Los ntawm cov nqi no yog nyob ntawm tus xov tooj ntawm cov xim uas yuav muab tso tawm kom tau ntawm qhov screen (n). Muaj yog ib tug qauv rau nws txhais: n = 2 k. Yeej, nraaj ntaub ntawv sawv cev nyob rau hauv 8, 16, 24 los yog 32-ntsis version, nyob ntawm seb lub PC kho vajtse pab kiag li lawm.
Niaj hnub nimno LCD cov ntxaij vab tshaus yog tau mus ua si ntau tshaj 4 billion xim. Kev sib piv, ib txhia peb caug los yog plaub caug xyoo dhau los, ib lub computer yog ib tug palette ntawm 16 xim!

Cov duab zoo rau qhov kev tshuaj ntsuam nyob tsis tau tsuas yog nyob rau hauv lub xov tooj ntawm cov xim tso tawm, thiab cov kev tshuaj ntsuam kev daws teeb meem, tab sis kuj nyob rau hauv daim duab nrog rau cov ntawv "dpi" - tus xov tooj ntawm pixels ib chav tsev cheeb tsam. Tus me no tus nqi, tus "grainy" tau daim duab.

Coding duab ntaub ntawv kuj tso cai rau koj yuav hloov ib tug duab rau hauv ib tug vector hom. Vector duab - ib txoj kev ntawm uas sawv cev rau cov khoom siv yooj yim geometric duab: cov ntsiab lus, cov kab, curves, polyhedra. Lawv txoj hauj lwm rau qhov kev tshuaj ntsuam yog txhais los ntawm coordinates, xim kuj muab kho, thiab lub thickness ntawm cov txheej kab. Vim hais tias ntawm nws cov qauv, ntau pab kiag li lawm tsim los ua hauj lwm nrog bitmaps, ces tus graphics nyob rau hauv vector sawv cev, feem ntau yog nyob rau hauv ua ntej, ua ntej cov zaub yog ua los ntawm kev kawm tshwj xeeb.

Binary cai duab ntaub ntawv nyob rau hauv phau ntawv daim ntawv yog ua li cas nyob rau hauv tib txoj kev raws li cov video encoding thiab duab.