Kev Xaiv Tshiab Tshiab Txog Kev Dag Ntaus - Cov Vig Nyiaj
Peb yog ib lub lag luam loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv nyuaj, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
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Daim nqi yuav hais tau tias yog ib feem ntawm cov ntaub ntawv zoo sib xws nyob rau tib neeg lub neej txhua hnub. Los ntawm cov siv nyiaj ntau dua, daim ntawv tso nyiaj, cov ntawv ua lag luam thiab cov ntawv them se, cov khoom lag luam, cov tshev, cov ntawv muag, cov thwj cim thiab cov pib ua ntau yam, thiab lwm yam. Daim nqi tsis yog ib daim voucher xwb, tab sis kuj muaj qhov tshwj xeeb sau nqi ntawm cov khoom lag luam. Nrog rau kev tsim duab zoo tshaj plaws thiab cov khoom siv zis, tshwj xeeb tshaj yog qhov tshwm sim ntawm cov xim thaij duab khawm, laser printers thiab cov koob yees duab zoo siab xim, cov tswv lag luam tau yooj yim txhuam, splicing, ci ntsa iab, qhov sib txawv, thiab xim kho ntawm cov ntaub ntawv. Ntxiv cov kev hloov rau tom qab thiab cov ntawv nyeem ua rau nws yooj yim los ntaus cov luam ntawm cov tshev thiab lwm cov nuj nqis. Cov khoom siv ua lag luam los tiv thaiv kev ua lag luam tsis tuaj yeem ua raws li qhov kev thov. Yuav kom tiv thaiv tej teeb meem no, cov nuj nqi tau muab tso rau hauv kev siab dua rau kev siv cuav rau kev tsim thiab tsim khoom.
Lub tshuab fais fab tshiab tiv thaiv kev lag luam yuav tsum xub ua tshwj xeeb, yog li ntawd lub tshuab coj los siv tsis tau los ntawm lwm qhov; tsis tas li ntawd, cov cuab yeej siv yooj yim los ntaus ua ke. Cov kev siv watermarking yog ib txoj hauv kev zoo, uas yog ib qho tseem ceeb ntawm txoj kev tshawb fawb txog cov ntaub ntawv nkaum technology. Cov kev siv tshuab fais fab (digital watermarking) yuav tsis hloov cov duab pom ntawm daim nqi, thiab tuaj yeem tsim kom muaj tswv yim zoo dua rau cov kws tshaj lij fab. Tib lub sij hawm, nws muaj lub ntiaj teb zoo tshaj plaws, muaj kev ruaj ntseg thiab feem ntau tshaj tawm tsam cov qauv kev phem.
Ua ntej, qhov xwm txheej tsis zoo ntawm daim nqi
Tuam Tshoj tus qauv luam tawm tshuab luam ntawv muaj ntau lub tswv yim, xws li optics, chemistry, electromagnetism, computer technology, spectroscopy, thiab technology code nraaj. Nws yog qhov kev kawm ua ntu zus. Cov yees siv yees tiv thaiv tam sim no muaj raws li nram no:
1 Ntawv tiv thaiv kev lag luam: Nrog rau kev loj hlob sai ntawm Tuam Tshoj lub tshuab papermaking, daim ntawv nrog kev tiv thaiv kev lag luam tawm tsis tu ncua mus rau cov nqi ntawm cov khoom siv, xws li cov xov xwm, cov ntawv pom thiab pom cov ntawv xov xwm, kev ruaj ntseg xov ntawv, lwm yam. peb cov sawv daws. Kev siv dav dav siv los tiv thaiv kev lag luam, ntxiv rau cov ntawv luam tawm, thaum peb paub cov technologies no, qee qhov yuav pom ncaj ncaj ntawm lub qhov muag, muaj qee qhov yog siv los ntawm cov twj paj nruag, thiab lwm cov neeg muaj kev paub meej. Cov no yog thawj kab kev tiv thaiv kev lag luam, kev tiv thaiv kab mob thib ob thiab cov kab thib peb los tiv thaiv kev lag luam hauv kev lag luam.
2 Ink Anti-Counteritization: Nyob rau hauv cov luam tawm ntawm cov nqi kho mob, cov khoom siv tiv thaiv tsis zoo yuav muab faib ua cov xim fluorescent, xim tsis muaj xim, khov ntim ntawm infrared, photochromic, kub hloov, hloov tshuaj, nta nyias muaj nyias Lub tswv yim tawm tsam kev tiv thaiv tsis yog tawm tsam los ntawm thawj, ob thiab thib peb kab hais los saum no.
3 phaj anti-counterfeiting: phaj ua anti-counterfeiting yog daim ntawv thov rau qee qhov kev software rau tsim qee tus shading anti-counterfeiting, cov shading yog yooj yim kom tau theej mus rau ib yam twg, txij ntawm no kis mus cuag cov hom phiaj tiv thaiv, ntau tshaj yog: cov neeg siv cov paj, cov ntawv me me, Cov ntawv me me, Lub latent duab, xauv npo, qhov txawv ntawm qhov dav, thiab lwm yam, qhov kev tiv thaiv ntawm lub shading tiv thaiv tsis yog los ntawm cov kab, cov kab yuav tsim cov nplua nuj hloov, tuaj yeem tiv thaiv kev lag luam thiab kev thaij, ntxiv cov nqi ntawm daim nqi, ntawm chav kawm, tsim thiab tsim tawm nrog shading anti-khib nyiab Thaum lub sij hawm, cov kev cai ntawm cov computers yuav tsum yog siab. Tam sim no, nws yog ib txoj kev tiv thaiv kev tiv thaiv, uas yog siv hauv cov ntawv pov thawj, daim ntawv pov thawj, thiab cov kev nyab xeeb.
4 Kev tiv thaiv cwj pwm: Tshawb fawb kev siv luam ntawv, kev siv xov xwm tshaj tawm tiv thaiv kev sib txuam ua ke nrog cov cwj mem los tiv thaiv cov cwj mem thiab cov cwj mem los tiv thaiv kev ua lag luam thiab cov phaj ua kev tiv thaiv cwj pwm, kev siv hluav taws xob tiv thaiv kev sib xyaw nrog cov kev zoo ntawm peb anti-counterfeiting txoj kev, uas coj zoo kawg thiab teeb meem rau counterfeiting. Ntawm chav kawm, nws tus nqi ntxiv yog siab dua.
5 tawm tsam kev tiv thaiv kev ua kom muaj teebmeem thaij tawm kub thaij tshuab. Cov txheej txheem ntawm qhov chaw kub kub nyhiab yog qhov nyuaj heev. Nws yuav tsum kom lub chaw luam ntawv luam kom muaj ib qho kev tshaj tawm qhov chaw kub kub khoom. Txhua hom holographic anti-counterfeiting technologies xws li pixel holography, tseeb xim hluavtaws encryption micro-engraving embossing, thiab lwm yam yuav siv tau rau hauv daim ntawv lo lub kub stamping. Zoo heev los tiv thaiv kev txuam tawm.
6 zaj dab neeg luam tawm kev siv tshuab cuav. Cov zaj duab xis los ntawm kev siv luam yeeb ua rau luam tau ntau yam xim thiab lub caij nyoog hloov xim yog muag raws li cov luam ntawv yuav tsum ua ntawm daim nqi. Cov txheej txheem ntawm cov xim ntau tshaj plaws rau kev luam duab zaj duab xis tsis yooj yim, thiab nws tsis yooj yim pom qhov chaw ntawm cov xim ntau xim hauv cov cwj mem kua hauv daim pib. Nws tsis yooj yim rau cov neeg txhaum cai los txiav txim qhov spacing ntawm txawm yog hais tias txoj kev siv zaj duab xis los siv, ua li cas ntxiv cov nquj. Qhov teeb meem ntawm counterfeiting.
Nyob rau hauv xyoo tas los no, Tuam Tshoj tau ua kom muaj kev vam meej hauv kev loj hlob ntawm cov khoom siv tiv thaiv kev tiv thaiv thiab kev tiv thaiv kev siv tshuab luam yeeb. Piv txwv, tshwj xeeb tiv thaiv kev lag luam luam tawm cov nqi hluav taws xob, DNA kev tiv thaiv kev lag luam tawm thiab cov tshuab luam ntawv ntawm cov tshuab luam tawm me me tau luam tawm cov ntaub ntawv luam tawm. Nyhuv.
Qhov thib ob, cov ntsiab lus ntawm cov kev ua luam dej
Lub tswv yim tseem ceeb ntawm cov kev siv tshuab (watermarking) yog siv cov ntaub ntawv qhia txog (xws li cov ntaub ntawv xov xwm, cov xov tooj, cov ntawv tso cai, cov ntawv tseem ceeb, thiab lwm yam) rau ntau hom xov xwm xws li cov duab, cov suab lus, thiab cov yeeb yaj duab kom ua tiav cov lus qhia. Txoj kev no tsis cuam tshuam rau kev siv cov ntaub ntawv tseem ceeb, tsis hloov pauv cov ntaub ntawv tseem ceeb, thiab tsis hloov cov ntaub ntawv tseem ceeb.
1. Cov cwj pwm cwj pwm tsis zoo ntawm kev ua luam dej
Lub qhov muag tsis pom ntawm cov xov xwm digital txiav txim tias nws tuaj yeem ua ke nrog rau lwm cov khoom siv yees tawm. Lub digital watermark luam tawm anti-counterfeiting tshuab yog txawv ntawm cov txwm luam anti-counterfeiting tshuab. Nws ua tiav cov tswvyim tshiab ntawm kev luam tawm los tiv thaiv kev dag thiab muaj cov cim hauv cov kev lag luam tawm tsam ntawm cov teeb meem luam tawm.
1 lub tshuab tshwj xeeb. Cov ntaub ntawv embedded thiab embedded ntawm cov watermarks yog random. Cov ntaub ntawv pov thawj uas muab zais los ntawm txhua hom luam tawm tuaj yeem sib txawv, thiab qhov chaw txuas ntxiv ntawm watermark kuj yog qhov qub. Xws li cov kev coj xaiv thiab kev hloov variation ua rau nws tsis yooj yim rau counterfeiters rau counterfeit.
2 kev lag luam tawm tsam kev lag luam tawm me me thiab pheej yig. Cov neeg siv cov kev siv watermark tau ncaj nraim rau cov ntaub ntawv tiv thaiv tawm tsam teeb meem los ntawm kev siv lawv tus kheej lub ntim thiab tsim los ntawm digital watermarking software. Tsis tas yuav hloov qhov kev tsim tawm los sis luam ntawv, tsis muaj cov ntaub ntawv tshwj xeeb, tsis xav kom muaj kev luam ntawv ntxiv, luam tawm cov nqi thiab hloov tus qauv tsim thawj.
3 hloov khoom dua tshiab yog ceev ceev. Raws li tus yam ntxwv ntawm cov khoom, txawv software tsim rau kev sib txawv thiab yooj yim rau kev hloov tshiab, yog li ntawd qhov sib piv luam tawm los tiv thaiv kev lag luam yuav tuaj yeem upgraded.
4 siab ceev. Ntxiv nrog rau nws tus kheej thiab unidirectionality, thiab raws li cov lus cog tseg hauv kev tshaj tawm, digital kev siv technology kuj muaj peev xwm ua ke nrog cov cim cryptographic thiab pej xeem yuam kev kuaj pom, uas yog ntau tshaj lwm yam yees.
5 khoom muaj nqis ntxiv. Kev siv cov chaw thoob ntiaj teb pom tau tias muaj kev tiv thaiv tsis pub muaj kev lag luam - cov kev siv technology uas tsis muaj kev tiv thaiv, yuav ua rau cov lag luam tsis muaj dab tsi ua, kom pab tau cov neeg muaj kev ntseeg siab hauv cov neeg siv cov khoom siv thiab cov khoom siv, tsim kho thiab tuav cov neeg siv hom duab, thiab nce khoom ntxiv-ntxiv.
2. Cov tub ntxhais kawm technology ntawm digital luam ntawv
1 Cov kev tsim lub cim qub thiab kev nkaum algorithm raws li cov kabmob algorithm.
Lub vavelet sau algorithm yog siv los hloov cov ntaub ntawv teev cov ntaub ntawv ntawm cov duab cov duab rau cov sib txuas sib txuas ua ke ntawm coefficients los ntawm discrete wavelet txauv (DWT), thiab raws li hom ntaub ntawv yuav tsum tau muab zais, nws yog qhov tsim nyog encoded thiab deformed, thiab ces raws li qhov loj ntawm cov ntaub ntawv thaum. Thiab lub hom phiaj tiv thaiv kev ruaj ntseg, xaiv cov square frequency domain coefficient ib theem zuj zus. Thaum kawg, qhov sib txuam ntawm cov duab digital ntawm cov duab digital yog cov uas tau hloov mus rau hauv cov ntaub ntawv sau tseg.
2 lub tshuab fais fab pov thawj ua lag luam.
Thaum tus cuav ua ntawv tau txais ib pob ntawv luam tawm uas muaj digital watermark, nws yuav sim luam nws (xws li siv cov kev sib tw high scanner). Txhawm rau tiv thaiv cov ntaub ntawv watermark los ntawm kev luam tawm, cov xov tooj digital watermark software siv tus chromatographic sib npaug uas siv algorithm los zais cov ntaub ntawv qhia txog watermark. Txoj kev no yuav xyuas kom tus cwj pwm tsis tuaj yeem tsis hloov tus chromatographic sib npaug thaum tus txheej txheem kho qhov xim ntawm thawj daim duab, yog li fundamentally txav tias lub watermark tsis tau theej.
3 cov cuab yeej tawm tsam kev tiv thaiv.
Los ntawm cov duab los luam cov teeb meem, nws yog ib qho tsim nyog los ntawm ntau cov txheej txheem xws li phaj ua thiab luam ntawv. Cov yam ntxwv ntawm cov ntaub ntawv watermarks yuav tsum tau ua rau txhua tus txheej txheem. Yuav kom ntseeg tau tias cov teeb liab lub zog nyob hauv qhov kawg luam, digital watermark embedding software yog tsim. Cov ntaub ntawv xov xwm watermark yuav siv rau hauv lub zauv txaus lub teeb liab kom ntseeg tau tias lub teeb liab lub zog (robustness) yog qhov tseem tshuab tau zoo thaum nyeem los ntawm ntau cov txheej txheem.
4 cov ntaub ntawv watermark tshawb nyeem tshuab.
Cov ntaub ntawv xov xwm kev nyeem ntawv ua rau cov xov tooj tsis muaj kev cuam tshuam tsis pub muaj kev txhawj xeeb rau cov tib neeg, txhawm rau txheeb xyuas qhov ceev, txhim kho kev ruaj ntseg ntawm cov ntaub ntawv khaws tseg (watermark), thiab muaj peev xwm tsim tau ntau lub tsho nrog cov khoom siv tshuaj tiv thaiv kev ruaj ntseg xws li RFID, ultraviolet, magnetic strip thiab li ntawd. Cov txheej txheem cuav phem los txhawm rau txhim kho txoj kev ruaj ntseg tag nrho.
Thib peb, lub moj khaum ntawm cov kev ua luam dej
Ib hom digital watermarking qauv muaj ob lub ntsiab txheej txheem: ib qho yog txheej txheem ntawm lub watermark, thiab lwm qhov yog lub extraction los sis nrhiav kom tau tus txheej txheem ntawm lub watermark. Txhua tus tswvcuab muaj tus cim watermark, lossis tus tswv yuav ntim tau ntau lub watermarks mus rau lwm yam khoom. Cov ntaub ntawv watermark yog preprocessed thiab ntxiv rau lub cab kuj, uas yog hu ua embedding. Lub ntim ntawm ib lub watermark yuav to taub raws li kev sib kis ntawm ib lub teeb liab (watermark) los ntawm kev sib kis cov kev sib txuas lus ntawm kev sib txuas lus dua ib lub vojvoog loj (thawj daim duab). Tus qauv tsim ntawm theem ntim tsuas yog daws ob teeb meem: lub cim thiab embedding algorithm ntawm digital watermark. Extracting watermark cov ntaub ntawv los ntawm cov ntaub ntawv xa cov ntaub ntawv xa los yog nrhiav cov hav zoov ntawm cov ntaub ntawv qhia txog watermark yog hu ua watermark extraction thiab detection. Tam sim no, feem ntau watermarking schemes siv lub ntsiab thaum ntxiv thiab rho tawm, thiab tsuas yog tus neeg uas masters tus yuam sij tuaj yeem nyeem cov ntawv pov thawj.
Lub hauv paus ntawm digital watermarking technology rau daim pib tiv thaiv kev lag luam yog ib yam nkaus li ntawm cov xov tooj cua uas siv digital rau cov suab paj nruag thiab suab paj nruag, tshwj tsis yog tias txoj hauv kev ntim ntawm kev ua dej num, kev ntsuam xyuas yog yuav tsum tau, thiab nyob rau hauv txheej txheem ntawm kev ua lag luam extraction thiab kev paub tias yuav tsum muaj qhov teeb meem luam tawm. Cov ntaub ntawv nraaj yog luam, thiab muaj ib qho kev hloov ntawm analog / digital (A / D) hauv cov txheej txheem no. Qhov no yuav tsum tau hais tias algorithms raws li half-half cov kev ua haujlwm cov kev ua lag luam yuav tsum tau suav rau cov yam hauv cov khoom coj los tsim thiab nrhiav kom tau. Txoj kev ua haujlwm thiab kev rho tawm yog tshwm nyob hauv daim duab 1 thiab daim duab 2.
Xam phaj 1 Watermark txheej txheem txheej txheem hauv cov teeb meem luam tawm
Daim duab 2 Txheej txheem extraction txheej txheem los ntawm cov teeb meem luam tawm
Qeb plaub, daim ntawv thov cov ntawv luam tawm hauv tsev thiab nyob sab nrauv hauv kev nyab xeeb
Nrog rau txoj kev siv tshuab raj digital, daim ntawv thov kev pabcuam ntawm cov kev ua luam dej kuj tau nthuav dav ntxiv, los ntawm kev siv thaum ntxov siv cov suab thiab yees duab rau txhua yam ntawv tso cai, nqi, thiab lub ntim cov khoom muaj nqi xws li nto moo cov luam yeeb, cov cawv nto moo, thiab cov tshuaj muaj nqis. Kev tiv thaiv kev lag luam, cov kev ua luam dej tau siv ntau hauv kev luam tawm tsis pub luam tawm ntawm ntau daim pib.
Lub teb chaws Yelemees siv cov xov tooj cua qiv los tiv thaiv cov duab hauv cov duab, thiab ua ntaub ntawv xov xwm uas tsis yog pom hauv cov duab. Txoj kev no tuaj yeem ceev nrooj thiab tsis paub meej txog qhov tseeb ntawm daim ntawv pov thawj. Cov kev tshawb fawb ntawm MIT Media Lab ntxiv ib qho tshwj xeeb, pom cov watermark rau txhua tus duab tso tawm los ntawm lub tshuab luam ntawv xim los yog tshuab luam ntawv. Los ntawm kev txiav txim siab sai los yog tsis muaj ib lub raj ntawm cov ntawv pov thawj, nws ceev nrooj qhov tseeb qhov tseeb. Nyiv tau ntxiv cov ntaub ntawv pov thawj rau kev tuav pov hwm, thiab cov ntaub ntawv khaws qov raws li kev daws teeb meem ntawm cov duab cov duab, los txiav txim siab seb cov duab puas muaj teeb meem nrog thiab qhov uas muaj kev cuam tshuam. Signum lub VeriData software muab cov ntawv pov thawj rau cov ntawv pov thawj rau cov ntawv luam tawm, cov ntawv pov thawj, cov ntawv pov thawj, thiab cov ntawv pov thawj. , ntawv tshaj tawm thiab ntim.
Tuam Tshoj tus 61,000 daim pib rau lub Tuam Tshoj 6 tuam txhab qhib rau xyoo 2005, Sichuan lub 10 lab Shenji cov ntawv xov xwm tawm los ntawm Sichuan Panda rau 2008 mascot Olympic Games, thiab daim pib rau 6th International Expo hauv Suav teb. Kev siv txoj kev vam meej ntawm lub ntiaj teb cov rooj sib txoos loj thiab kev ua yeeb yam siv cov tshuab luam yeeb uas siv digital luam tawm. Tsis tas li ntawd, Tuam Tshoj tus Olympic daim ntawv siv cov khoom siv tiv thaiv los ntawm kev lag luam los ntawm kev ua luam, uas siv cov ntsiab lus loj thiab sib txuas nrog cov nqi loj thiab cov chaw ua haujlwm yooj yim. Lub ntsiab ntawm nplooj ntawv yog siv los qhia txog lub teb chaws ntawm cov teb chaws ua si ntawm Olympic ua si, ntawm kev sib sau ua ke; tus Thawj Ciam Tus Thawj Coj sau cov ntaub ntawv xws li daim ntawv teev npe thiab kev tuaj kawm ntawv, uas yog xyuas txog qhov kev ua pov thawj. Lub koom haum tseem ceeb thiab pab pawg hauv koom haum siv digital watermark luam tawm los tiv thaiv kev lag luam los ua kom tiav qib siab ntawm kev tiv thaiv, kom paub tseeb tias cov phom sij ntawm Olympic ua si yuav tsum tau qhib rau kev muag khoom muag (tshwj xeeb tshaj yog rau cov khw muag khoom muag) raws li Olympic lag luam kev npaj tswv yim, tsis muaj kev ntshai ua phem thiab ua phem.
Cov kev siv watermarking yog lub ntsiab lus kub nyob hauv tsev thiab txawv teb chaws. Nws yog nyob rau hauv ib theem ntawm kev loj hlob sai thiab nruam, thiab daim ntawv thov yog sai expanding. Nws plays lub luag haujlwm tseem ceeb hauv kev lag luam tawm anti-counterfeiting thiab tau ua ib qho tseem ceeb ntawm kev tiv thaiv kev lag luam. Cov ntaub ntawv lag luam muaj nuj nqis tseem ceeb hauv kev sib raug zoo hauv lub neej, thiab cov hauj lwm tiv thaiv kev lag luam ntawm cov lag luam tawm yog tshwj xeeb tshaj yog. Cov cua ntawm fake daim pib tau raug txwv ntau dua. Lub tuam txhab ticketing tau txais xya hom kev tiv thaiv kev tiv thaiv ntawm ib daim pib, thiab nws tseem tsis tuaj yeem tshem tawm qhov loj tuaj ntawm cov ntawv fake. Vim li no, kev siv cov tshuab raj thaij (digital watermarking technology) los hloov cov cuab yeej los tiv thaiv kev lag luam yog cov kev coj ua txoj kev loj hlob. Nrog rau lub tshuab fais fab uas tsis muaj kev lag luam tawm tshiab, nws yog txoj hauv kev tiv thaiv rau kev tiv thaiv kev tiv thaiv ntawm lub nqi ntim, thiab yuav coj nyiaj txiag ntau thiab cov kev pabcuam.