Raster dluab thiab ua hauj lwm nrog lawv

Thaum ua hauj lwm nrog ob tug-dimensional graphics, nws yog ib qho tseem ceeb heev kom to taub cov qauv rau kev nws cov qauv thiab tej ntsiab cai nyob rau hauv uas nws yuav tau hloov, nyob rau hauv ib lo lus, sawv cev rau, raws li pom los ntawm lub computer. Ntawm ob lub ntsiab hom ntawm cov dluab - vector thiab raster -each pom nws daim ntawv thov nyob rau hauv ib tug cheeb tsam, thiab kuj muaj nws zoo.

Chav uas tus bitmaps yog pixels. Cov no yog cov me me plaub fab ntawm lub monitor, uas nqa thiab kis cov xim ntaub ntawv. Nrog lawv pab bitmaps tais li ib tug puzzle, thiab yog ntaus nqi raws li ib tug tag nrho. Zoo saib tso saib cov dluab nyob rau hauv lub xov tooj ntawm pixels ib nti. Yeej tag nrho cov niaj hnub computers yog manufactured nrog ib tug daws teeb meem ntawm 72 los yog 96 pixels ib nti (tus nqi txawv nyob ntawm seb ciaj ciam ntawm lub screen).

Raster dluab yuav ua sai sai txawv los ntawm lub vector los ntawm kev saib lawv loj. Cov feem ntau tawm tswv yim rau raster - ib tug .gif, .bmp, .png, .jpeg, .psd thiab lwm tus neeg.

Raster dluab yog tau los ntawm kev tsim ib cov ntaub ntawv nyob rau hauv tsev av Photoshop siv yooj yim cuab yeej, raws li zoo raws li PP tej ntaub ntawv. Tsis tas li ntawd, tag nrho cov duab mus rau qhov no hom ntawm ob-dimensional graphics. Yog li, tsis muaj kev hloov cov hom ntawm cov hom ntawm cov ntaub ntawv nyob rau hauv tus txheej txheem, koj yuav tsum tsis txhob zoo poob thiab distortion ntawm cov xim. Thiab sau dluab siv lub tshuab luam ntawv, raws li ib tug bitmap duab.

Neeg txhais lus raster duab rau hauv ib tug vector yog haum yooj yooj yim thiab xwb yuav tsum tau ib tug graphics editor uas txhawb ob hom ntawm cov dluab. Nyob rau hauv cov ntaub ntawv no, thaum koj txuag cov duab tsuas qhia ib tug vector graphics hom. Txawm li cas los, qhov no txoj kev tsis yeej ib txwm muab zoo tshwm sim. Nws yog tov rau manually redraw lub bitmap duab rau hauv ib tug vector, tab sis nws yuav tsum tau zoo kev txawj ntse nyob rau hauv kev ua hauj lwm nrog vector graphics editor.

Yog li ntawd, cia peb hais txog cov ntsiab lus tseem ceeb ntawm lub bitmap duab ntawm qhov screen - ib tug pixel daim phiaj, qhov zoo ntawm uas yog nyob rau kev daws teeb meem thiab koj saib. Tej graphics tau yooj yim yuav hloov dua siab tshiab mus rau lwm lub hom. Thaum los ze zog kev soj ntsuam ntawm cov circuits yog nyob rau hauv daim ntawv ntawm cov duab polyline ntawm kab theem uas yog rau ib thaj tsam ntawm pixels.

Raster dluab yog, tsis muaj nrog, lawv drawbacks thiab cov kev txwv, uas kuj yuav tsis tau ignored. Tsis zoo li vector graphics, xws duab muaj ib thaj tsam nce thiab lwm yam loj hloov. Nrog ib tug tseem ceeb nce nyob rau hauv lub scale ntawm ib tug bitmap, nws yuav ua tsis tau nyiaj. Yog li ntawd, cia ntawm lub pixel dluab ntawm loj loj npog, ntsig txog, thiab ib tug ntau ntawm computer nco. Nyob rau hauv tas li ntawd, lub raster graphics yuav luag tsis txhawb transparency zog. Tsuas yog cov duab nyob rau hauv .gif thiab .png endowed nrog no feature, thiab yog li ntawd muaj qhov zoo tshaj ntawm ib tug siab dua theem.

Raster hom ntawv yog feem ntau haum rau cov neeg uas muaj nyob rau hauv dej siab ntawm cov tsim dluab nrog complex muaj tiag ntxoov ntxoo, thiab lwm yam peb-dimensional teebmeem thiab textures. Thiab, ntawm chav kawm, cov kev pab txog uas ua koj cov dluab nyob rau hauv Photoshop, qhia tau hais tias ib tug bitmap hom duab.