Modeli opisa rastertonske slike

undergraduate thesis

• Author: Marijana Martinac
• Mentor: Vesna Džimbeg-Malčić (mentor)
• Committee member: Ivan Budimir (član povjerenstva)
• Committee member: Vesna Džimbeg Malčić (član povjerenstva)
• Committee member: Damir Modrić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2014-9-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

Rastertonska slika se sastoji od niza točaka umjesto punog tona. Te točke mogu biti različite veličine, boje, pa čak i različitog oblika. Veće točke se koriste za tamnije, gušće tonove slike, dok se manje točke koriste za svjetlija područja. Za vrijeme proizvodnog procesa dolazi do promjene u veličini rasterskog elementa, odnosno stvarna veličina rasterske točke na papiru veća je od njenog digitalnog originala. Ova pojava naziva se prirast rasterske točke. Prirast rasterske točke može utjecati na tonske vrijednosti stvarne slike. Ovo se događa dijelom zbog prodiranja bojila na i unutar papira, što se naziva mehanički prirast, a dijelom zbog raspršenja svjetlosti unutar papira, što se naziva optički prirast. Jedan od najvažnijih parametara kvalitete tiska je definiranje prirasta RTV-a koji se mora uskladiti s postojećim standardima. Cilj ovog završnog rada je prikazati i objasniti modele kojima se opisuju te promjene unutar papira, a to su Murray-Daviesov i Yule-Nielsenov model.

Abstract (english)

A halftone image is made up of a series of dots rather than a continuous tone. These dots can be different sizes, different colours, and sometimes even different shapes. Larger dots are used to represent darker, more dense areas of the image, while smaller dots are used for lighter areas. During the printing process, we have some changes in the size of the halftone print, in other words, the printed dots appear bigger than the dots in the original digital bitmap. This phenomenon is called dot gain. Dot gain can affect the tone characteristics of a printed image. This is partly because of the spreading and penetrating of the ink on and in the paper, called physical dot gain, and partly because of the diffusion of the light in paper, which is referred to as optical dot gain. One of the most important parameters of the printing quality is defining the increase of TVI, which has to be synchronised with current standards. The goal of this final work is to show and to define models that are used to describe these changes that happen within paper, the Murray-Davies model and the Yule-Nielsen model.

• Keywords: prirast rasterske točke; raspršenje svjetlosti; RTV - rastertonska vrijednost; Murray - Daviesov model; Yule - Nielesenov model
• Keywords (english): dot gain; light scattering; TVI - tone value increase; the Murray - Davies model; the Yule - Nielsen model
• Language: croatian
• URN:NBN: urn:nbn:hr:216:812533
• Study programme: Title: Printing technology, course Technical - technological; Course: Graphic technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka grafičke tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-04-16 18:02:26