A halin yanzu, a cikin fasahar sarrafa launi, abin da ake kira sararin haɗin haɗin launi yana amfani da sararin chromaticity na CIE1976Lab. Ana iya canza launuka akan kowace na'ura zuwa wannan sarari don samar da hanyar siffanta "duniya", sannan ana aiwatar da daidaita launi da juyawa. A cikin tsarin aiki na kwamfuta, aikin aiwatar da canjin launi yana kammala ta hanyar "launi matching module", wanda ke da mahimmanci ga amincin canza launi da daidaita launi. Don haka, yadda za a cimma canjin launi a cikin sararin launi na "duniya", cimma asarar rashin hasara ko ƙarancin launi?
Wannan yana buƙatar kowane saitin na'urori don samar da bayanin martaba, wanda shine fayil ɗin fasalin launi na na'urar.
Mun san cewa na'urori, kayan aiki, da matakai daban-daban suna nuna halaye daban-daban yayin gabatarwa da watsa launuka. A cikin sarrafa launi, don gabatar da launuka da aka gabatar a kan na'ura ɗaya tare da babban aminci a kan wata na'ura, dole ne mu fahimci halayen gabatar da launi na launuka akan na'urori daban-daban.
Tun da sarari launi mai zaman kansa na na'ura, CIE1976Lab chromaticity sarari, an zaɓi, halayen launi na na'urar suna wakiltar wasiƙun da ke tsakanin ƙimar bayanin na'urar da ƙimar chromaticity na sararin launi na "duniya", wanda shine takaddar bayanin launi na na'urar. .
1. Fayil bayanin fasalin launi na na'ura
A cikin fasahar sarrafa launi, mafi yawan nau'ikan fayilolin bayanin fasalin launi na na'ura sune:
Nau'in farko shine fayil ɗin fasalin na'urar daukar hotan takardu, wanda ke ba da daidaitattun rubuce-rubuce daga kamfanonin Kodak, Agfa, da Fuji, da kuma daidaitattun bayanai na waɗannan rubutun. Ana shigar da waɗannan rubuce-rubucen ta hanyar amfani da na'urar daukar hoto, kuma bambanci tsakanin bayanan da aka bincika da daidaitattun bayanan rubutun yana nuna halayen na'urar daukar hotan takardu;
Nau'i na biyu shine fayil ɗin fasalin nunin, wanda ke ba da wasu software waɗanda za su iya auna zafin launi na nuni, sannan su haifar da toshe launi akan allon, wanda ke nuna halayen nuni; Nau'i na uku shine fayil ɗin fasalin na'urar bugu, wanda kuma ke ba da tsarin software. Software yana samar da jadawali mai dauke da daruruwan tubalan launi a cikin kwamfutar, sannan ya fitar da jadawali akan na'urar fitarwa. Idan na'ura ce ta firinta, kai tsaye tana yin samfura, kuma na'urar bugawa ta fara samar da fim, samfurori, da kwafi. Ma'aunin waɗannan hotunan da aka fitar yana nuna bayanin fasalin fasalin na'urar bugu.
Fayil ɗin da aka ƙirƙira, wanda kuma aka sani da fayil ɗin fasalin launi, ya ƙunshi babban tsari guda uku: taken fayil, tebur tag, da bayanan alamar tag.
·Babban fayil: Ya ƙunshi mahimman bayanai game da fayil ɗin fasalin launi, kamar girman fayil, nau'in hanyar sarrafa launi, sigar tsarin fayil, nau'in na'ura, sararin launi na na'urar, sarari launi na fayil ɗin fasalin, tsarin aiki, mai kera na'ura , Maƙasudin maido da launi, kafofin watsa labarai na asali, bayanan launi mai haske, da sauransu. Babban fayil ɗin ya ƙunshi jimlar 128 bytes.
· Tag Tebur: Ya ƙunshi bayani game da adadin suna, wurin ajiya, da girman bayanan tags, amma baya haɗa da takamaiman abun ciki na tags. Yawan sunan tags ya ƙunshi bytes 4, yayin da kowane abu a cikin tag ɗin ya ƙunshi bytes 12.
·Bayanan abubuwan alama: Yana adana bayanai daban-daban da ake buƙata don sarrafa launi a wuraren da aka keɓance bisa ga umarnin da ke cikin tebur ɗin alama, kuma ya bambanta dangane da sarƙaƙƙiyar bayanan alamar da girman bayanan da aka lakafta.
Don fayilolin fasalin launi na kayan aiki a cikin masana'antar bugawa, masu sarrafa hoto da sarrafa bayanan rubutu suna da hanyoyi guda biyu don samun su:
·Hanya ta farko: Lokacin sayen kayan aiki, mai sana'a yana ba da bayanin martaba tare da kayan aiki, wanda zai iya saduwa da bukatun sarrafa launi na kayan aiki. Lokacin shigar da software na aikace-aikacen kayan aiki, ana loda bayanin martaba a cikin tsarin.
·Hanya ta biyu ita ce yin amfani da software na ƙirƙira na musamman don samar da fayilolin bayanin fasalin launi masu dacewa dangane da ainihin yanayin na'urorin da ake dasu. Wannan fayil ɗin da aka ƙirƙira yawanci ya fi daidai kuma yayi daidai da ainihin yanayin mai amfani. Sakamakon canje-canje ko karkata a yanayin kayan aiki, kayan aiki, da matakai akan lokaci. Sabili da haka, wajibi ne a sake yin bayanin martaba a lokaci-lokaci don dacewa da yanayin amsawar launi a wancan lokacin.
2. Watsa launi a cikin na'urar
Yanzu, bari mu kalli yadda ake yaɗa launuka a cikin na'urori daban-daban.
Na farko, don rubutun hannu mai launuka na al'ada, ana amfani da na'urar daukar hotan takardu don dubawa da shigar da shi. Saboda bayanin martaba na na'urar daukar hotan takardu, yana samar da ma'amala mai dacewa daga launi (watau ja, kore, da ƙimar tristimulus shuɗi) akan na'urar daukar hotan takardu zuwa sararin chromaticity CIE1976Lab. Saboda haka, tsarin aiki zai iya samun ƙimar darajar chromaticity Lab na launi na asali bisa ga wannan dangantakar juzu'i.
Hoton da aka duba yana nunawa akan allon nuni. Tun da tsarin ya ƙware a wasiƙun da ke tsakanin ƙimar chromaticity Lab da siginonin tuƙi na ja, kore, da shuɗi a kan nuni, ba lallai ba ne a yi amfani da ja, koren, da shuɗin kimar chromaticity na na'urar daukar hotan takardu yayin nuni. Madadin haka, daga darajar Lab chromaticity na rubutun da ya gabata, bisa ga dangantakar jujjuyawar da bayanin martabar nuni ya bayar, ana samun siginar tuƙi na ja, kore, da shuɗi waɗanda za su iya nuna daidai launi na asali akan allon, Fitar da nunin. don nuna launuka. Wannan yana tabbatar da cewa launin da aka nuna akan mai duba yayi daidai da launi na asali.
Bayan lura da daidaitaccen nunin launi na hoto, mai aiki zai iya daidaita hoton bisa ga launi na allo bisa ga bukatun abokin ciniki. Bugu da ƙari, saboda bayanin martabar da ke ɗauke da kayan aikin bugu, ana iya ganin launi daidai bayan bugu akan nuni bayan rabuwar launi na hoto. Bayan mai aiki ya gamsu da launi na hoton, hoton ya rabu da launi kuma an adana shi. A lokacin rabuwar launi, ana samun daidaitattun adadin dige bisa alaƙar canza launi ta bayanan na'urar bugu. Bayan yin RIP (Raster Image Processor), yin rikodi da bugu, bugu, tabbatarwa, da bugu, ana iya samun kwafin kwafin ainihin takaddar, don haka kammala aikin gaba ɗaya.
Lokacin aikawa: Nuwamba-23-2023
