Akanema amabereka moyo wanu kudijito ...
Inde, pali mitundu yambiri ya ma scanner, koma ambiri mwa iwo (kupatulapo, mwina, makina opangira ma drum omwe amagwiritsidwa ntchito mu makampani osindikiza) data "catch" -kulemba malemba, bizinesi, kapena zithunzi, kuphatikizapo filimu, poyera, slide , ndi zolakwika-njira yomweyi, yomwe ndi mutu wa nkhaniyi. Kodi chojambulira chimatenga tsamba lolimba bwanji, kubweretsanso zomwe zilipo, ndikusintha deta yanu pa fayilo ya kompyuta yomwe iwe ndi ine tikhoza kuchita nayo monga tikukondera?
Chida Chophatikiza-Chipangizo (CCD) Chigawo
Ngakhale makanema ali ndi zigawo zosiyanasiyana, monga magalasi, lenses, magalimoto, ndi zina. Pazinthu zamakono zamakono, komabe, chigawo chachikulu ndizojambulidwa pothandizira (CCD). Miyala yosavuta kumva yomwe imatembenuza photons (kuwala) kwa magetsi, kapena magetsi, ma diode amadziwika kwambiri monga photosites .
Zojambulajambula zimagwirizana ndi kuwala; kuunika kukuwunika kwambiri kuposa magetsi. Malingana ndi chitsanzo cha scanner, fano kapena mawonekedwe ake akupita ku CCD gulu kudzera mndandanda wa lens, filters, ndi magalasi. Izi zigawozi zimapanga mutu wachingwe . Pulogalamu yojambulira, mutu wajambulidwa waperekedwa pa chandamale (chinthu chomwe chikuwonedwa).
Malingana ndi scanner, ena ndi osakwatira ndipo ena amatha kupititsa, zomwe zikutanthauza kuti amatenga chinthu chomwe chikujambulidwa podutsa limodzi kapena atatu, motero. Pa pulogalamu ya katatu, penti iliyonse imatenga mtundu wosiyana (wofiira, wobiriwira, kapena wa buluu), ndiyeno pulogalamuyi imagwirizananso njira zitatu za RGB, kubwezeretsa chithunzi choyambirira.
Masiku ano, ma scanner ambiri ndi osakwatira, ndi lens yomwe imakhala yosiyana kwenikweni ndi njira zitatu, popanda wogwiritsa ntchito mwanzeru.
Lembani Sensor yajambula
Zina zamakono zogwiritsa ntchito zamakono zamakono kuti zitheke posachedwapa ndizojambula zithunzi (CIS). CIS imalowetsa mbali ya CCD, ndi makonzedwe a magalasi, mafayilo, nyali, ndi lens, ndi mizera yofiira, yobiriwira, ndi ya buluu (RGB) yowala yomwe imatulutsa ma LED (LEDs). Pano, mawonekedwe a mawonekedwe a mawonekedwe amakhala ndi masensa 300 mpaka 600 omwe amawonekera m'lifupi la mbale kapena sopo. Ngakhale kuti chithunzi chikujambulidwa, ma LED akuphatikiza kupereka kuwala koyera, kuunikira chithunzi, chomwe chimagwidwa ndi masensa.
Ma scansiti a CIS samapereka mlingo womwewo wa khalidwe ndi chisankho chomwe chimaperekedwa ndi makina a CCD-based, koma omwe poyamba amakhala ochepa, owala, ndi otsika mtengo.
Kusintha ndi Kuzama Kwambiri
Ndondomeko ziti zomwe muyenera kuzijambulira zimadalira komwe mukukonzekera kugwiritsa ntchito fanolo. Mapulogalamu a makompyuta, mapiritsi, ndi mafoni a m'manja sangathe kusonyeza malingaliro opitirira 72 mazenera pa inch (dpi), ndi omvera a HD omwe amathandiza 96dpi. Chinthu chokhacho chimene chimachitika mukasanthula fano pamasinthidwe apamwamba kusiyana ndi momwe angasonyezedwe, deta yapadera imangothamangitsidwa, yomwe, ndithudi, imatenga nthawi.
Zithunzi m'mabuku anu okwezeka kwambiri ndi zowonjezera, ndizosiyana. Kuti mupeze zotsatira zabwino, nthawi zonse muyenera kuzifufuza pa 300dpi, ndi apamwamba, apamwamba kwambiri, ngati n'kotheka-pokhapokha ngati mukufunika kukulitsa chithunzicho pakusintha.
Kuzama kwa maonekedwe kumatanthauzira chiwerengero cha mitundu mtundu winawake (kapena kujambulira) uli ndi. Zowonjezereka ndizomwe zili 8-bit, 16-bit, 24-bit, 36-bit, 48-bit, ndi 64-bit, ndi mawonekedwe oyambirira, 8-bit, othandizira 256 mitundu kapena mithunzi ya imvi ndi 64 bili wothandizira mabiliyoni mitundu-yochuluka kuposa momwe diso la munthu lingakhoze kuzindikira.
Mwachiwonekere, mwa kulingalira, zolinga zapamwamba ndi kuya kwakuya kumapangitsanso khalidwe lajambuzi, ndi chifukwa, ndithudi. Mitundu, khalidwe, ndi tsatanetsatane ziyenera kukhalapo musanayese . Ziribe kanthu momwe mungapangire bwino, zingathe kuchita zozizwitsa.