Lissafin girman hoto na dijital bashi da rikitarwa. Koyaya, akwai yawancin sharuɗɗa masu alaƙa tare da hotunan dijital kuma wani lokacin Abu ne mai sauki ka rikita daya da dayan. Kafin sanin yadda za'a lissafa girman, yana da mahimmanci a bayyane game da wasu ra'ayoyi, kamar menene hoton dijital ko bambanci tsakanin girman dijital ko nauyi da girman jiki. A cikin wannan sakon Zamu kawo karshen wadannan shakku da zamu koya muku yadda ake kirga girman hoto na dijital Karka kasala!
Menene hoton dijital
Hoton dijital shine wakilcin hoto mai fuska biyu ta hanyar ragi. A bit shi ne karami naúrar bayanai, yawanci ana yin su ne da sifili. A bayyane, hoto na dijital shine dayawa da sifiri (bayani) cewa idan aka hada su zasu samarda hoto.
Muna kiran wannan nau'in hotunan, wanda aka kafa ta lambar binary bitmaps. Ana kiran su haka, saboda a zahiri sune sakamakon haɗuwa da adadi mai yawa ko pixels. A zahiri, idan ka je shirin gyara, kamar Photoshop, kuma ka faɗaɗa hoto sosai, zaka iya rarrabe waɗannan pixels ɗin. Kowane pixel an yi shi ne da ragowa.
Abubuwan da yakamata ku bayyana a yayin magana game da hotunan dijital
Zurfin launi
La zurfin launi yana nufin yawan ragowa da ake bukata don sanyawa da ajiye bayanin game da launi na kowane pixel. Misali, idan ya zama 1 bit, launuka 2 ne kacal za a iya kewayawa; amma idan yakai 24, za a iya ajiye launuka miliyan 16,7 daban.
Yanayin launi
Yanayin launi shine iyakar adadin da aka kayyade na bayanan launi wanda za'a iya adana shi. Misali, a yanayin launi na RGB, ana iya adana duka launuka miliyan 16 (zurfin launi 24-bit), yayin da idan muka yi aiki tare da yanayin monochrome, launuka biyu ne kawai za a adana (zurfin launi 1-bit).
Girman hoto na dijital
An bayyana girman hoto na dijital azaman samfurin llambar pixels da wannan hoton yake da su a faɗi ta lambar pixels sama. Girman hoto na dijital, wanda aka fi sani da nauyin hoto, ana yawan auna shi ta baiti, MB, ko KB da kar a rikita shi da girman jiki (wanda yawanci ana auna shi cikin cm). Ana iya buga hoto iri ɗaya a girman jiki daban-daban, kamar yadda za a iya buga hotuna masu nauyin daban a girman jiki ɗaya. Abinda ke tantance girman dijital hoton shine ingancin sa: mafi girman girmansa, ma'ana, gwargwadon pixels ɗin da yake ƙunshe da shi, mafi girman ingancinsa. Idan muna da hoto wanda ya ƙunshi pixels kaɗan, ƙimar za ta ragu kuma waɗancan pixels ɗin za su kasance a bayyane.
Misali, idan na buga hotunan dijital guda biyu daban-daban a cikin girman jiki, wanda yake da mafi yawan pixels (hoto na 1) yana da kyau mafi kyau daga ɗayan (hoto 2).
Yanke shawara
La Ana kuma san ingancin hoto na zamani azaman ƙuduri. Ta hanyar fasaha, ƙuduri shine nauyin pixels, ma'ana, lambar pixels a inci 1 (dpi).
Azancin, thearancin hoton yana da nauyi, ƙananan pixels zasu ƙirƙira shi kuma ƙananan pixels ɗin za'a kasance a cikin kowane inch. Sakamakonsa zai zama mafi muni fiye da na hoto mai nauyin nauyi wanda aka buga a daidai girman jikin.
Lokacin da ka tantance menene ƙuduri zaku buga, ppi 200 ko 300 ppi, misali, ba ku canza girman dijital na hoton ba, abin da kuka gyara shine girman jiki. Idan ka buga a ppi 200 zaka sami hoto mafi girma tare da ƙananan ƙuduri. Idan kun ɗaga ƙudurin zuwa 300, hoton zai zama ƙarami a zahiri, saboda kuna tambaya cewa adadin pixels da yawa zai kasance cikin kowane inch, kuma don cimma wannan girman girman jikin ya ragu saboda girman dijital ya kasance koyaushe.
Yadda ake lissafa girman hoto na dijital
Don lissafta girman hoto na dijital a cikin baiti, kawai dai mu ninka yawan jimlar pixels wannan yana da hoton (pixels high x pixels wide) ta nauyin kowane pixel.
Don gano nauyin kowane pixel, dole ne kuyi la'akari da yanayin launi. Misali, idan hoto ne na RGB, abin da za mu yi shi ne raba rago 24 zuwa 8, saboda 1 bit daidai yake da baiti 8. Idan kana son sanin girman a KB, kawai zaka raba sakamakon zuwa 1024.
Koyaya, akan kwamfutar, ta hanyar samun damar dukiyar fayil ɗin zaka sami girman hoton ba tare da wata matsala ba Abin da ya fi rikitarwa shine sanin irin girman da yakamata ku buga hoton dijital don ƙudurin yayi kyau, Na kawo muku a zamba hakan zai ceci ranka. Kuna iya samun dama wannan kalkuleta mai girman kan layi don shirya ayyukanku don bugawa da kunna shi lafiya.