Saor in Aisce Nollag Biongó Cártaí An príomh modh de dath foriomlán ceartú do scanóirí

Saor in Aisce Nollag Biongó Cártaí An príomh modh de dath foriomlán ceartú do scanóirí

 

Mar táimid go léir tá a fhios % 2c an bunúsach eilimintí de clóite meáin táirgí tá grafaicí % 2c an is mó tábhachtach le haghaidh an íomhá de dath priontáil táirgí % 2c mar an priontáil próiseas % 2c an pictiúr scanadh dath scaradh is a an eochair nasc in an réamhphreas obair % 2c an scanóir is an tábhachtach uirlis le haghaidh an ionchur de réamh-phreas íomhánna. Ag present, the scanners used are both high-end networking of electronic color separators, and high-grade drum scanners evolved from electrical extension, as well as various flatbed scanners, the process of color correction involves involves more links, control and operation are often complex, here only the main methods of color correction are isteach.

 

1. Scan an bunleagan lámhscríbhinn

Mar gheall ar an leap in dath bainistíocht teicneolaíocht % 2c inniu % 27s ard-deireadh scanadh trealamh % 2c mar mar ICG370HS 2c SCREEN8060PII nó ard-deireadh líonrú síneadh % 2c mar fada mar tá sé i gceart oibriú i gceart 2c it beidh a bheith sásta leis an scanadh cáilíocht . Mar fada mar an oibreoir de ard-deireadh scanadh trealamh seo a leanas prionsabail áirithe agus go domhain tuiscint an téama léirithe in an pictiúr % 2c it can get a good image effect.

 

I fact, the quality bottleneck reflected in prepress scanning is mainly focused on the quality of the scanned manuscript. The quality of the scanned manuscript directly affects the quality of the final printed matter, but different manuscripts must take different scanning processing methods. Éagsúla bunaidh grianghraif % 2c priontaí% 2c Sínis pictiúir % 2c watercolors agus ola pictiúir léiriú téamaí éagsúla 2c mar sin tá sé is gá chun achoimre na rialacha agus próiseáil pointí in an próiseas de scanadh agus cóipeáil de réir na na saintréithe de an bunaidh bunaidh 2c agus bunú scanadh curves do éagsúla bunaidh saintréithe tar éis go leor cleachtais chun feabhas a chur ar cáilíocht de scanadh dath scaradh. In the identification of the original, the non-applicable manuscript should be corrected or processed, and the original that cannot be copied should be replaced, so as not to affect the overall quality of the final print.

 

2. Tagarmharc socrú agus coigeartú de scanóir

Cuimsíonn an caighdeán calabrú de an scanóir focal fad coigeartú % 2c gile % 2c codarsnacht % 2c bán cothromaíocht agus dath coigeartú . An calabrú de an scanóir is chun a chinntiú go an íomhá íomhá liath cothromaíocht % 2c mogalra baint% 2c dath bias% 2c méid agus sharpness freastal an tacar rialú riachtanais. An ról de bán cothromaíocht ceartú is chun choigeartú an uasmhéid aschur obair voltas de an scanadh ceann trí cainéil (R% 2c G% 2c B ) photomultiplier agus cothromaíocht an comhartha de na trí cainéil (R% 2c G% 2c B). Tá an roghnú pointí de bán cothromaíocht de éagsúla cineálacha de lámhscríbhinní difriúil, an bán iarmhéid de transmission lámhscríbhinní is in the clean area of the roller, and the white balance of reflection manuscripts is in the white area of the manuscript or on the white coated paper.

 

An setting of resolution has a great influence on the quality of the scanned image. When scanning images, if the resolution setting is too low, the scanned image particles are rough, the image edges are jagged, and the quality is poor. Más rud é the resolution is set too high, it will make unnecessary details in the original manuscript, spots on the picturesque surface, wrinkles, and other background around the image stand out, and will make the storage space of the scanned image too large, affecting the scanning speed. Dá bhrí sin, the resolution of the scanned image must be set correctly to get a clear image. Ós rud é the scanning resolution {{0}} plus the number of network lines × magnification × Quality Factor, when the scanner is determined, choosing the appropriate quality factor is crucial to the output image quality, in order to ensure the output image quality, the quality factor is often 2.0.

 

Tríú% 2c dath sláine ceartú

1. Ceart roghnú agus socrú de bán/black field of the original manuscript

The correct selection and setting of white and black fields in the original manuscript is the key to reproduce the color and level of the original manuscript, and is the basis for effective color and level adjustment. The correct white field and black field selection and setting should be based on the characteristics of various types of manuscripts and printability conditions, and make full use of the whiteness of the paper and the maximum density of the four-color ink overlay to achieve the best visual contrast effect. Since the printing of the photographic manuscript is a process of contrast compression, the selection and setting of the white field should make full use of the whiteness of the paper, while taking into account the high profile level; The selection and setting of the black field should fully express the level of the dark tone of the image to meet the visual habits and psychological requirements. The setting of white field/black field should expand the tone of the main body of the manuscript as much as possible and increase the intensity of contrast.

 

2% 2C uathoibríoch liath socrú agus liath cothromaíocht ceartú

Uathoibríoch liath ceartú is a tapa ceartú modh le haghaidh liath dath diall in 1% 2f4% 2c lár agus 3% 2f 4 ordú toin . Go is% 2c tar éis socrú an bán agus dubh réimsí in an réamh-scuabadh íomhá íomhá % 2c mar sin go an liath luach sroicheann an gnáth luach. Tá sé seo an- cabhrach le haghaidh dath scaradh scanadh de páirteach lámhscríbhinn.

 

Gray balance refers to the neutral gray produced by yellow, magenta and green three color plates according to different dot values. The characteristics of neutral gray depend on the characteristics of the ink, and gray balance is extremely important for color reproduction. Gray balance is the basis of any color separation method to achieve correct color reproduction, if the gray balance can not be achieved when the color separation, then the gray in the copy of the original is not gray, then other colors will inevitably produce color bias. When gray balance is corrected, CMY can be corrected for a single channel or a whole channel at the same time. Not only can the 1/4, middle and 3/4 keys be corrected, but the other keys can also be corrected in the same way by repeating the selection of points. The correction of gray balance must fully understand the color of the original manuscript in the real environment, otherwise it will cause the gray axis reflected in the picture should not be offset, seriously affecting the color quality of the overall image.

 

Ceithre% 2c dath ceartú

Is é an priontáil agus atáirgeadh próiseas de dath bunaidh lámhscríbhinn an teaglaim de dath dianscaoileadh agus dath athchóiriú de íomhá faisnéis . In an iarbhír atáirgeadh próiseas % 2c mar gheall ar go éagsúla coinníollacha nach bhfuil idéalach % 2c an ann de dath difríocht is dosheachanta . An dath difríocht thagann ó trí gnéithe % 3a

 

1. An dath diall de an bunaidh lámhscríbhinn féin mar gheall ar an próiseas grianghrafadóireachta agus ábhair agus an dath diall ba chúis leis an discoloration de an dath meán (dath maolú).

2. Dath diall ba chúis le earráidí de solas foinse % 2c lionsa % 2c dath scagaire agus photomultiplier in an próiseas de dath dianscaoileadh.

3. Color deviation caused by paper and ink errors in the process of color reduction.

 

Dá bhrí sin% 2c dath ceartú is is gá . An dath ceartú feidhm ní amháin deireadh a chur leis an thuas dath difríocht go hoibiachtúil atá ann cheana sa próiseas de dath dath atáirgeadh % 2c ach freisin an speisialta riachtanais de dath ceartú de an bunaidh lámhscríbhinn.

 

De ghnáth dath ceartú tá bunaithe ar sé dathanna % 3a Cyan% 2c Magenta % 2c Buí % 2c Dearg 2c Glas agus gorm. Le haghaidh pictiúir le a áirithe lí mar an bunúsach dath % 2c an bunúsach dath is féidir a bheith i gceart áibhéil agus tugtha go leor dath a dhéanamh a dhéanamh a priontáil éifeacht níos mó níos mó feiceálach 2c agus an méid de an os coinne dath dath . Ar an bonn de ní difear an foriomlán liath cothromaíocht de an íomhá % 2c an modh de réigiún próiseáil is féidir a úsáid chun ceart an áitiúil ábhar dath . Le haghaidh roinnt pictiúir le liath mar an príomh comhlacht 2c i gceart feabhsú an dath dath an íomhá .

 

I gearr% 2c dath ceartú is a cuimsitheach machnamh de an cáilíocht de trealamh % 2c próiseas agus oibreoirí i dath atáirgeadh % 2c agus amháin trí máistreacht a dlíthe is féidir an iarbhír riachtanais de an lámhscríbhinn agus úsáideoirí a bheith an fearr feidhmíocht .