Chithunzi cha bitmap (kapena raster) ndi chimodzi mwa mitundu ikuluikulu yojambula (yowonjezeramo). Zithunzi zojambulidwa ndi bitmap zili ndi pixels mu gridi. Chombo chilichonse kapena "bit" mu chithunzi chili ndi zambiri zokhudza mtundu woti uwonetsedwe. Zithunzi za Bitmap zili ndi chigwirizano chokhazikitsidwa ndipo sichikhoza kusinthidwa popanda kutaya khalidwe lachifanizo. Ndicho chifukwa chake:
Mpikisano uliwonse pa skrini yanu ndi, mwachidule, mawu "aang'ono" a mtundu wa mtundu womwe umagwiritsidwa ntchito kusonyeza chithunzi pawindo. Mpukutuwo ukhoza kukhala waung'ono ngati wa pa Watch Apple kapena waukulu ngati Bokosi la Pixel lomwe linapezeka ku Times Square.
Pamodzi ndi kufunikira kudziwa mitundu itatu- Red, Green, Blue- ikugwiritsidwa ntchito kwa pixel ina "bit" ya chidziwitso ndikuti, ndendende, pixel ili mu fano.Zipisipelezizi zimapangidwa pamene chithunzicho chatengedwa. Kotero ngati kamera yanu imagwira chithunzi pa pixel 1280 kudutsa ndi 720 pixelisi pansi pali pixel 921,600 pachithunzi ndipo mtundu wa pixel aliyense ndi malo ayenera kukumbukiridwa ndi kuperekedwa. Ngati mukuphatikiza kukula kwa fano, zonse zomwe zimachitika ndi ma pixel akukula ndipo kukula kwa fayilo kumawonjezeka chifukwa nambala ya pixel yomweyi ili panopa. Palibe pixelisi yowonjezedwa. Ngati mumachepetsa kukula kwa chifanizirocho, nambala ya pixel yomweyi ili m'dera laling'ono ndipo, monga choncho, kukula kwa fayilo kumachepetsa.
Chinthu china chimene chimakhudza bitmaps ndicho chisankho. Chisankhocho chimakhazikitsidwa pamene chithunzichi chimalengedwa. Makamera ambiri amakono amakono, mwachitsanzo, akujambula zithunzi ndi kuthetsa ma dpi 300. Zonsezi zikutanthauza kuti pali ma pixelisi 300 mu inchi iliyonse ya chithunzi. Izi zikufotokozera chifukwa chake mafano amamera a digito akhoza kukhala aakulu kwambiri. Pali pixel tani zambiri zomwe zimapangidwa ndi mapu ndi zamitundu kuposa momwe zimapezeka pamakompyuta ambiri.
Zowonongeka zochokera ku bitmap ndi JPEG, GIF, TIFF, PNG, PICT, ndi BMP. Zithunzi zambiri za bitmap zingasandulike ku mawonekedwe ena a bitmap mosavuta. Zithunzi za Bitmap zimakhala ndi ma fayilo akuluakulu kuposa mafilimu a vector ndipo nthawi zambiri zimakanikizidwa kuti zichepetse kukula kwake. Ngakhale maofesi ambiri a zithunzi ndi bitmap-based, bitmap (BMP) ndi mawonekedwe owonetsera ngakhale ntchito yake lero ndi yosawerengeka.
Kuti mudziwe zambili za bitmaps, kufotokozera kwathunthu kwa pixel ndi momwe zikugwirira ntchito yamakono yamakono, mungafune kufufuza kuti mudziwe zambiri za mafayilo osiyanasiyana ojambula omwe amagwiritsidwa ntchito pojambula kuti mungafunenso kuti muwerenge Ndondomeko Yotani Yemene Fomu Ndi Yabwino Kwambiri Yogwiritsira Ntchito Liti?
Kusinthidwa ndi Tom Green.
Zolemba Zithunzi
Komanso: raster
Zina zapadera: mapu a mapu BMP