Cov xim muaj peev xwm ntawm Landa li cas?
Landa digital printing khoom siv nano number case technology, uas muaj qhov zoo ntawm ultra-me me pigment particle size, tsuas yog kaum ntawm nanometers, piv rau cov particle loj ntawm ib txwm inks ntawm txog 500nm. Cov xim nanoscale pigment tuaj yeem nkag mus zoo dua thiab ua raws li qhov sib txawv ntawm cov substrates, tsim cov duab tuab ntawm tsuas yog 500nm. Qhov tuab no tsawg dua li ib nrab ntawm cov duab offset number case. Lub sijhawm no, tus cwj mem tsuas yog ua raws li qhov chaw ntawm lub substrate thiab tsis nkag mus rau sab hauv, thiab xim saturation thiab clarity ntawm daim duab luam tawm yog qhov zoo heev. Landa cov cuab yeej luam ntawv tuaj yeem ua tiav 4 ~ 8 xim luam ntawv los ntawm inkjet luam ntawv ntawm 600dpi lossis 1200dpi daws teeb meem, ntawm cov khoom siv ntawv txhawb nqa txog 7 xim (CMYK + OGB) thiab cov khoom siv teb txhawb txog 8 xim (CMYK + OGB + dawb). Raws li cov ntaub ntawv raug cai, 4-xim CMYK teeb tsa tuaj yeem npog 84% ntawm Pantone xim gamut, thaum 7-xim CMYK + OGB teeb tsa tuaj yeem npog txog 96% ntawm Pantone xim gamut.
Daim ntawv no tso siab rau Landa sheetfed digital printing khoom ntawm Shenzhen Jiuxing Printing thiab Ntim Group Co., Ltd. los kuaj thiab tshuaj xyuas nws cov xim muaj peev xwm tsim tawm ntawm cov ntawv dawb nrog lub peev xwm ntawm 300g / m2. Ua ntej, cov khoom siv yog linearized los ntsuas qhov saturation thiab gradation uniformity ntawm nws cov monochrome, thiab tom qab ntawd cov ntaub ntawv ICC ntawm cov cuab yeej raug tshuaj xyuas los ntsuas nws cov xim gamut kev ua tau zoo thiab qhov chaw xim xim.
Kev soj ntsuam ntawm cov txheej txheem tseem ceeb ntawm cov xim luam tawm ntawm 7-xim digital luam ntawv system
01
Hom thiab cov qauv ntawm linearization algorithms
Linearization ntawm cov cuab yeej luam ntawv digital yog ib qho tseem ceeb thev naus laus zis los ua kom muaj kev sib raug zoo ntawm cov khoom siv tawm tswv yim thiab cov teeb liab tawm. Lub 7-xim channel linearization muaj cov txheej txheem tseem ceeb ntawm kev sib piv nrog cov tsoos CMYK 4-xim. Thawj yog qhov nce ntawm cov xov tooj ntawm cov channel, los ntawm 4 mus rau 7 txhais tau hais tias qhov loj ntawm cov lus nrhiav tau nce exponentially. Feem ntau linearization algorithms suav nrog 4 hom hauv qab no:
(1) Polynomial haum algorithm yog qhov yooj yim tshaj plaws linearization txoj kev, uas paub linearization los ntawm haum polynomial curves ntawm cov tswv yim thiab cov ntaub ntawv tawm. Qhov zoo ntawm cov algorithm no yog cov kev suav yooj yim thiab tsis tshua muaj qhov tsis zoo, tab sis qhov tsis zoo yog tias nws muaj peev xwm ua qauv rau cov kev sib raug zoo tsis sib xws.
(2) Lub rooj saib (LUT) algorithm yog txoj kev siv linearization ntau tshaj plaws hauv kev luam ntawv digital . 1D LUTs yog daim ntawv yooj yim tshaj plaws uas tsuas yog ua ib qho channel ntawm daim duab, txhais cov nqi tso tawm rau txhua qhov kev tawm tswv yim (0 txog 100). Lub ntsiab lus ntawm 1D LUT yog lub rooj saib hauv ib qho - qhov chaw seem, thiab txhua qhov kev tawm tswv yim yog "repositioned" los ntawm LUT kom tau txais tus nqi tawm tshiab, nthuav tawm ib qho - rau - ib qho kev sib raug zoo. Ib tug raug ICC tshuab luam ntawv profile configures 1D lookup rooj (1D LUT) raws li tus naj npawb ntawm cov xim raws ntawm lub ntaus ntawv, thiab ces siv ib tug 3D lookup rooj (3D LUT) kom tiav cov xim gamut mapping thiab xim hloov.
(3) Lub zos linear regression algorithm ua tau zoo hauv kev tswj cov xim, tshwj xeeb tshaj yog nyob rau hauv me me thiab nruab nrab-cov qauv piv txwv uas kwv yees los ntawm digital printing lookup tables, thiab nws cov kev ua tau zoo dua li neural networks, polynomial regression thiab spline functions. Lub tswv yim tseem ceeb ntawm lub algorithm yog siv cov txheej txheem hauv zos linear regression teeb ntawm cov ntsiab lus hauv zej zog rau txhua qhov kab sib chaws kom haum rau cov kab sib chaws hyperplane los ntawm qhov hnyav tsawg tshaj plaws squares, thiab kwv yees txhua qhov tso zis xim sib cais.
(4) Kev kawm tob algorithms sawv cev rau kev txhim kho tshiab tshaj plaws ntawm kev siv tshuab linearization. Cov thev naus laus zis niaj hnub no tau paub txog cov qauv linearization ntawm cov xim luam tawm raws li kev sib sib zog nqus kev kawm sib txuas, thiab nrog rau online feedforward multi-dimensional nonlinear colour density pay method, nws tuaj yeem ua tiav cov xim gamut dav, siab linearity, thiab cov ntawv luam tawm tsis tu ncua thiab ruaj khov.
02
Ntau -channel xim tswj algorithms
Ntau-channel xim tswj rau 7- cov khoom siv xim xav tau kev txhawb nqa tshwj xeeb algorithm. Hauv cov txheej txheem 4-xim CMYK, kev tswj xim feem ntau tsom rau qhov sib npaug ntawm plaub xim: xiav, magenta, daj, thiab dub, thaum lub 7-xim system yuav tsum xav txog kev sib cuam tshuam ntawm 7 xim tib lub sijhawm. Hauv 7-xim system, txhua xim tuaj yeem cuam tshuam nrog lwm yam 6 xim, thiab qhov kev sib raug zoo ntawm cov xim sib txawv no yuav tsum tau ua cov qauv lej ntau dua los piav qhia. Hauv cov txheej txheem CMYK ib txwm muaj, cov xim dub feem ntau yog siv rau kev sib npaug ntawm cov xim grey thiab txuag tus number case, thaum nyob rau hauv 7-xim system, qhov sib ntxiv ntawm txiv kab ntxwv, ntsuab, thiab xiav ua rau cov xim sib xyaw ntau dua. Feem ntau siv xim sib cais algorithms suav nrog ob hom hauv qab no:
(1) Composite Neugebauer qauv yog cov cuab yeej tseem ceeb rau kev ua ntau yam -xim luam ntawv. Cov qauv no yog cov qauv dav dav ntawm Neugebauer qauv uas faib tag nrho XYZ xim qhov chaw rau hauv ntau qhov ntim ntim, kwv yees cov xim tivthaiv qhov hnyav hauv qhov muab faib, thiab ua haujlwm los txiav txim siab XYZ qhov tseem ceeb ntawm peb cov xim yooj yim rau qhov muab faib. Txoj kev no tuaj yeem ua haujlwm zoo rau kev sib raug zoo ntawm cov xim sib txawv hauv 7-xim system.
(2) Cov ntau-channel xim qhov chaw hloov pauv algorithm yuav tsum xav txog kev sib raug zoo ntawm cov xim sib txawv. Thaum hloov los ntawm cov khoom siv xim qhov chaw (CMYKOBG) mus rau qhov chaw xim xim (xws li CIE Lab), koj yuav tsum tsim kom muaj kev hloov pauv hloov pauv. Cov kev tshawb fawb tau pom tias nws yog ib txoj hauv kev zoo los tsim kom muaj kev sib raug zoo ntawm qhov chaw ntaus ntawv thiab CIE XYZ qhov chaw los ntawm peb - qhov kev sib raug zoo, thiab kom ua tiav cov xim sib cais los ntawm kev siv peb - linear interpolation ntawm qhov tseem ceeb ntawm cov lus saib thiab kab lus.
Kev sim npaj thiab kev sim
01
Cov khoom siv kuaj thiab cov khoom siv
(1) Cov khoom siv kuaj: Landa cov khoom siv luam ntawv, 7-xim nano number case (CMYK + OGB);
(2) Daim ntawv xeem: 300g / m2 Asia Pacific Symbo Yinbo dawb cardboard;
(3) Ntsuas ntsuas: X-rite i1io spectrophotometer;
(4) Test software: EFI Fiery Xim Profiler Suite (CPS);
(5) Ib puag ncig tej yam kev mob: kub 25 ± 2 degree, av noo 55% ± 5%.
02Cov txheej txheem kuaj thiab cov kauj ruam
(1) Kauj Ruam 1: Sau daim ntawv qhia linearization. Preheat lub Landa cov cuab yeej luam ntawv rau ntau tshaj 30 feeb, thiab siv EFI Fiery Color Profiler Suite (CPS) los tso tawm daim ntawv qhia tawm. Lub Landa digital printing system tau teeb tsa nrog linearization xim rooj xws li 4 xim rau 7 xim. Kab lus no siv 7 xim piv txwv. Lub rooj 7-xim muaj 54 xim rau ib channel, tag nrho 378 xim thaj ua rau thaj, nrog rau thaj tsam thaj tsam ntawm 0 txog 100%.
(2) Kauj Ruam 2: Ntsuas cov kab ntawv linearization. Tos rau daim ntawv qhia linearization kom qhuav, thiab siv CPS i1iO kom tiav cov ntaub ntawv ntsuas rau 7 xim raws.
(3) Kauj Ruam 3: Kos lub suab nkhaus. Hloov cov ntaub ntawv ntsuas nrog cov ntaub ntawv theoretical los kos lub suab nkhaus rau 7 raws. Tshawb xyuas qhov sib txawv ntawm cov ntaub ntawv ntsuas thiab cov ntaub ntawv lub hom phiaj, xaiv qhov tsim nyog linearization algorithm, thiab xam cov kab linearization nkhaus.
(4) Kauj Ruam 4: Sau cov kab kos rau kev tsim cov ntaub ntawv ICC. Siv cov linearization nkhaus ntawm Kauj Ruam 3 los luam cov kab kos rau ICC cov ntaub ntawv tsim, xws li iT8.
(5) Kauj Ruam 5: xam thiab tsim cov ntaub ntawv ICC. Tom qab iT8 daim ntawv dries, ntsuas nws nrog CPS i1iO, txuag cov ntaub ntawv, thiab xaiv qhov tsim nyog xim sib cais algorithm los tsim cov ntaub ntawv ICC. Cov ntaub ntawv ICC no sawv cev rau qhov siab tshaj plaws xim gamut rau cov cuab yeej tam sim no thiab ntawv ua ke.
Cov ntaub ntawv sau thiab tshuaj xyuas
01
Ntaus Linearization Analysis
Qhov ntsuas qhov tseem ceeb ntawm daim ntawv qhia cov ntaub ntawv linearization muaj nyob rau hauv daim duab 1 thiab 2. Daim duab 1 qhia txog kev sib raug zoo ntawm thaj chaw dot ntawm txhua qhov ntawm 7 xim raws thiab qhov sib thooj CIE Lab lightness nqi L*. Cov ntsiab lus hauv daim duab yog cov ntsiab lus piv txwv rau txhua qhov channel, thiab qhov nkhaus yog qhov haum ntawm lub quadratic spline. Lub quadratic spline haum tsis tuaj yeem qhia txog kev sib raug zoo ntawm qhov chaw hauv cheeb tsam thiab qhov pom kev; ib qho kev ua haujlwm yooj yim dua yuav tsum tau piav qhia txog kev sib tham ntawm qhov sib npaug ntawm qhov chaw sib npaug thiab pom qhov pom kev pom.
Daim duab 1 Kev sib raug zoo ntawm thaj chaw dot thiab qhov ci ci
Daim duab 2 qhia txog kev hloov pauv xim thiab qhov siab tshaj plaws saturation ntawm cov xim hauv rau xim raws. Nyob rau hauv daim duab, cov xim liab thiab magenta channels qhia qhov tseem ceeb khoov nrog nce saturation, qhia tias cov xim sib xws ntawm ob pawg xim no tsis zoo. Ntawm chav kawm, xim tsis sib xws kuj muaj feem xyuam rau qhov sib xws ntawm CIE Lab xim qhov chaw. Rau cov kab daj thiab txiv kab ntxwv, chroma uas tsis yog- tsis sib xws kuj pom tseeb heev. Piv txwv li, nyob rau hauv cov kab daj, qhov sib nrug ntawm cov ntsiab lus sib xws hauv qab ab * tus nqi ntawm 50, tab sis saum toj 50 qhov sib nrug nce; cov txiv kab ntxwv channel coj zoo ib yam li cov kab daj, thiab nyob ib ncig ntawm 40, taw tes sib tshooj kuj tshwm sim, ua rau muaj qhov sib txawv. Yog li ntawd, phenomena xws li hue bending thiab chroma non{10}}uniformity yuav ua rau kom cov complexity ntawm linearization thiab xim sib cais algorithm txoj kev loj hlob.
Daim duab 2 Xim Saturation thiab Hue Performance ntawm Txhua Channel
Los ntawm kev sib txuas ntawm daim duab 1 thiab daim duab 2, qhov pom cov xim saturated ntawm lub cuab yeej tuaj yeem txiav txim siab. Table 1 qhia qhov sib tw ntawm qhov siab tshaj plaws chroma ntawm 300g / m2 dawb cardboard siv nyob rau hauv txoj kev tshawb no thiab chroma ntawm hom 8 ntawv raws li ISO 12647-2.
Table 1 Sib piv ntawm Chromaticity thiab Chroma Ntawm Landa Digital Printing System thiab ISO 12647-2 Hom 8 Ntawv
Cov ntaub ntawv 1 qhia tau hais tias, tshwj tsis yog rau magenta, nws chroma qis dua li ISO 12647-2 CD1 daim ntawv, chroma ntawm thawj xim ntawm Landa digital printing system tuaj yeem npog tag nrho cov chroma ntawm 8 hom ntawv teev tseg los ntawm ISO. Yog li ntawd nws tuaj yeem raug suav hais tias Landa cov tshuab luam ntawv digital tuaj yeem ua tau zoo nrog cov qauv luam tawm offset ntawm ISO 12647-2 los ntawm kev hloov kho ntxiv, thiab tau kawg, nws kuj tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawv pov thawj xws li G7 thiab C9.
02
Device Gamut Analysis
Tom qab linearization, cov tsim ICC profile qhia txog cov yam ntxwv xim tam sim no ntawm cov tshuab luam ntawv digital. Raws li pom hauv daim duab 3, nws yog qhov sib piv ntawm qhov gamut ntawm Landa digital printing system thiab Adobe RGB (1998) gamut. Lub gamut ntawm Landa digital printing system thiab Adobe RGB (1998) tsis muaj kev sib raug zoo yooj yim. Nyob rau hauv nruab nrab brightness ntau los ntawm xiav mus rau ntsuab, thiab nyob rau hauv tsawg brightness ntau los ntawm liab mus rau xiav, lub Landa digital printing system gamut muaj cov Adobe RGB (1998) gamut; whereas nyob rau hauv siab brightness ntau ntawm ntsuab mus rau daj, thiab los ntawm liab mus rau daj, nws yog muaj nyob rau hauv lub Adobe RGB (1998) gamut.
Daim duab 3 Kev sib piv ntawm Landa Digital Printing System nrog Adobe RGB (1998) Xim Gamut
Qhov teeb meem no qhia tau hais tias thaum siv cov kev sim dawb cardstock ua ke nrog Landa digital printing system rau siab -fidelity printing processes, lub reproduction muaj peev xwm rau saturated daj, txiv kab ntxwv, thiab ntsuab tones yog me ntsis weaker. Yog tias siv daim ntawv nrog cov xim dawb dua, nws tuaj yeem txhim kho.
Daim duab 4 qhia txog kev sib piv ntawm cov xim gamut ntawm kev sim Landa digital printing system nrog GRACoL2006_Coated gamut. Daim ntawv sib piv qhia tau hais tias Landa digital printing system cov xim gamut yeej suav nrog GRACoL2006_Coated gamut. Tshwj xeeb, qhov nruab nrab -brightness xiav- mus rau -ntsuab thiab liab-rau- xiav cheeb tsam tag nrho npog GRACoL2006_Coated gamut; Txawm li cas los xij, nyob rau hauv siab heev -brightness ntsuab- mus rau - cheeb tsam daj, GRACoL2006_Coated gamut yog me ntsis loj. Qhov xwm txheej no qhia tau tias kev sib xyaw ua ke ntawm kev sim dawb cardstock thiab Landa digital printing system muaj peev xwm rov tsim cov xim ntawm ISO 12647-2 offset printing. Yog tias daim ntawv uas siv cov xim dawb me ntsis, cov xim luam tawm hauv qhov chaw ci ntsa iab yuav zoo dua.
Daim duab 4 Kev sib piv ntawm Landa Digital Printing System nrog GRACoL2006_Coated Xim Gamut
Daim duab 5 thiab 6, siv qhov chaw xim simulation muaj nuj nqi ntawm ORIS X Gamut, 统计了在色差公差 Tsawg dua lossis sib npaug rau 3和 Tsawg dua lossis sib npaug 52 种情况下Landa数字印刷系统可还原的Pantone专色色域的比例. Daim duab 5 qhia tau hais tias thaum qhov kam rau ua tsawg dua los yog sib npaug rau 3, 94.9% ntawm 2390 Pantone xim thaj ua rau thaj tuaj yeem sib phim; Daim duab 6 qhia tau hais tias thaum qhov kam rau ua tsawg dua los yog sib npaug rau 5, 98.6% ntawm 2390 Pantone xim thaj ua rau thaj tuaj yeem sib phim. Cov txiaj ntsig ntawm qhov kev sim no tau lees paub qhov tseeb ntawm Landa qhov kev lees paub tias 7-xim CMYK OGB teeb tsa tuaj yeem npog txog 96% ntawm Pantone xim gamut.
Daim duab 5 Landa digital printing system kev pab them nqi ntawm Pantone xim gamut (xim txawv qhov kam rau ua Tsawg dua los yog sib npaug rau 3)
Daim duab 6 Landa digital printing system kev pab them nqi ntawm Pantone xim gamut (xim txawv qhov kam rau ua Tsawg dua los yog sib npaug rau 5)
Hauv cov ntsiab lus, qhov kev sim no tau sim cov xim muaj peev xwm tsim tawm ntawm Landa digital printing system siv lub tuam txhab feem ntau siv 300g / m² dawb cardboard. Cov ntaub ntawv tseem ceeb tshawb xyuas thaum lub sijhawm ntes tau qhia tias: Landa digital printing system's CMYK thawj xim muaj peev xwm tuaj yeem phim ISO 12647-2 CD1 daim ntawv thiab tuaj yeem npog tag nrho xya hom ntawv; piv nrog Adobe RGB xim gamut, Landa digital printing system's 7-xim gamut yog qhov me me nyob rau hauv qhov chaw ci ntsa iab thiab loj me me hauv nruab nrab qhov ci. Yog tias kev luam ntawv siab ncaj ncees tau ua tiav siv Adobe RGB primaries, nws raug nquahu kom siv daim ntawv nrog cov xim dawb dua; lub Landa digital printing system's 7-xim gamut yeej suav nrog GRACoL2006_Coated xim gamut, tuaj yeem ua tiav raws li ISO 12647-2 xim qauv, thiab thaum xim txawv tsawg dua lossis sib npaug rau 3, nws tuaj yeem phim ntau dua 94% ntawm Pantone xim gamut.