Raster images da kuma aiki tare da su

Lokacin aiki tare da biyu-girma graphics, yana da matukar muhimmanci a fahimci kayan yau da kullum na da tsarin da kuma ka'idodin waɗanda za a canza, a wata kalma, to wakiltar, kamar yadda gani da kwamfuta. Na biyu main iri images - vector da raster -each sami aikace a wannan yanki, kuma ma yana da nasa abũbuwan amfãni.

Raka'a wanda da bitmaps ne pixels. Wadannan su ne kananan murabba'ai na duba, wanda kawo da kuma aika da da launi bayanai. Tare da su taimako bitmaps folded kamar mai wuyar warwarewa, kuma ana tsinkayarsu a matsayin dukan. Quality duba nuna wadannan hotuna dogara da yawan pixels da inch. M duk zamani kwakwalwa suna kerarre da wani ƙuduri na 72 ko 96 pixels da inch (darajar dabam dangane da sigogi na allo).

Raster images za a iya sauri bambanta daga vector ta hanyar kallon su size. Mafi na kowa tsare-tsaren raster - a .GIF, .BMP, .PNG, .jpeg, .psd da sauransu.

Raster images ake samu ta hanyar samar da wani fayil a Adobe Photoshop amfani da asali kayan aikin, kazalika da Ana dubawa da kowane abuba. Bugu da ƙari, duk hotuna na wannan irin biyu-girma graphics. Saboda haka, ba tare da canza format na wadannan iri fayiloli a cikin tsari, za ka iya kauce wa ingancin asara da kuma murdiya da launuka. Kuma buga hotunan ta amfani da firinta, kamar yadda wani bitmap image.

Translation raster image a cikin wani vector ne fairly sauki da kuma kawai na bukatar a graphics edita cewa, goyon bayan da iri images. A wannan yanayin, a lokacin da ka ajiye hoton kawai nuna wani vector graphics format. Duk da haka, wannan hanya ba ko da yaushe ba mai kyau sakamakon. Shi ne safest da hannu redraw da bitmap image a cikin wani vector, amma shi yana bukatar mai kyau da basira a cikin aiki tare da vector graphics edita.

Saboda haka, bari mu jaddada babban wuraren da bitmap image a kan allon - a pixel Grid, da ingancin wanda ya dogara a kan ƙuduri da ka duba. Irin wannan graphics za a iya tuba a cikin wani format. Bayan kusa jarrabawa daga wadannan haihuwarka ne a cikin nau'i na hotuna polyline na line segments wanda su ne iyakokin pixels.

Raster images ne, babu shakka, su drawbacks da kuma gazawa, wanda kuma ba za a iya watsi da. Ba kamar vector graphics, irin hotuna da iyakoki da karuwa da sauran manyan canje-canje. Tare da wani gagarumin karuwa a sikelin da a bitmap, shi ne wata ila don rasa kudi. Saboda haka, ajiya na pixel images of manyan size rufe, bi da bi, da kuma da yawa daga kwamfuta memory. Bugu da kari, da raster graphics kusan ba ya goyon bayan gaskiya Properties. Kawai hotuna a .GIF kuma .PNG suna dauke da wannan siffa, kuma saboda haka suna da ingancin wani sabon matsayi.

Raster format ne mafi dace wa waɗanda suke a cikin ni'imar da samar da hotunan da hadaddun idon basira inuwõyinsu, da kuma sauran uku-girma illa da kuma laushi. Kuma, ba shakka, da masu daukan hoto da sarrafa hotuna a Photoshop, ya nuna ne kawai a bitmap irin hoto.