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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Įrenginio „XEROX DOCUCOLOR 5000“ ir „CONICA MINOLTA BIZHUB PRO 6500“ palyginamasis technologinių galimybių tyrimas / Comparison research of technological possibilities of “XEROX DOCUCOLOR 5000” and “CONICA MINOLTA BIZHUB PRO 6500” mechanism’s

Žuromskas, Povilas 01 July 2010 (has links)
Darbe ištirtos ir palygintos dviejų elektrofotografinių mašinų „Xerox DC5000“ ir „Conica Minolta 6500“ spalvų reprodukavimo galimybės. Tyrimas buvo atliekamas dviem spaudos mašinomis po tam tikro spaudų skaičiaus atspausdinant kalibracinį testą (lapą su specialiai spektrofotometrui paruoštais vienodo dydžio įvairių atspalvių kvadratėliais, kuriuose yra skirtingas visų keturių CMYK spalvų rastrinių taškų skaičius), kurio spalvų intensyvumas buvo matuojamas spektrofotometru „Efi ES–1000“. Nustatyta, kad spaudos mašinos „Xerox“ reprodukuojamų spalvų sodris didesnis lyginant su „Minolta“, tai lemia spaudo padengimas laku, kuris sukelia veidrodinį efektą, eliminuojama patenkanti į matavimo prietaisą išsklaidyta šviesa. Nustatytas savikalibracinės sistemos netobulumas bei abiejų mašinų spaudų skaičius, po kurio mašina turi buti kalibruojama. Darbą sudaro 7 dalys: įvadas, literatūros apžvalga, tyrimų metodika, rezultatai ir jų aptarimas, išvados ir rekomendacijos, literatūros sąrašas, priedai. Darbo apimtis – 57 p. teksto be priedų, 3 lentelės, 33 paveikslai, 15 bibliografinių šaltinių. Darbo priedai pridedami darbo pabaigoje. / The research regarding colour reproduction possibilities of two electrographic machines “Xerox DocuColor 5000” and “Conica Minolta Bizhub pro C6500” was made. In it two stamped machines were used, which had to stamp fixed numbers of calibration test (a paper with specially made, same size and various colours quadrants for spectrofotometer, where is different number of all four CMYK bitmap colour dots), which colour intensity was measured with using spaectrofotometer “Efi ES-1000”. The results have shown that “Xerox” machine has larger colour reproduction depth comparing to “Minolta” . This condition is made because of varnish that covers stamp. It creates specular effect and eliminates resolved light that comes to measuring devices. Self calibrating system cracks were discovered as well. Also two machines have to be calibrated after fixed number of stamps. Thesis has 7 parts: Introduction, literature review, research methodology, results, results discussion, conclusion and recommendation, literature list, appendix. Thesis consist of: 57p. text without appendix, 3 tables, 33 pictures, 15 bibliographical.
2

Rašalinio spausdintuvo spalvų gamos tyrimas / Investigation of colour gamut of ink – jet printer

Šperbelis, Gediminas 21 June 2005 (has links)
It was investigated the colour reproduction on prints made in ink-jet printer. Experimentally investigated gradation characteristics of CMYK colours. It was made a 26 step strip with raster dots from 0 to 100 %. Prints were made at different printing regimes on papers with different whiteness. Zone optical densities were measured, compared with theoretical density values and gradational distortions were determined. Also were measured 100% raster strips in CIE L*a*b* coordinate system and defined the maximum reproduction of colours in ink-jet printer.

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